"waterproofing"

The Park Plaza Hotel, Hercules House is positioned just south of Westminster Bridge overlooking the River Thames with spectacular views across London. The hotel provides high-end dining and premium facilities such as the spa, sauna and swimming pool. Within walking distance of London’s most famous attractions inclduing the London Eye, Big Ben, Westminster Abbey, the Houses of Parliament and the London Aquarium, Hercules House is the ideal place to stay in the Capital. Licata Building Systems was involved with the development of this project, providing several Licata systems, such as waterproofing and flooring systems. Licata waterproofing systems were used throughout the modern bathrooms and swimming pool facility. Licata resin flooring created a sleek and finish throughout public area of the hotel. 

Large scale Aquacrete lining installation to an underground swimming pool in a private house in London.120m2 of Aquacrete cement and quartz waterproof lining in Misty White colour was hand applied and then polished over existing mosaic tiles.

Originally designed by British architect William Young, the transformation from former Old War Office into The OWO has been overseen by the award-winning EPR Architects. Schlüter-Systems supplied a comprehensive selection of waterproofing solutions.

Teesside University’s Greig Building, named in honour of the founding father of computer science Bill Greig, is the home of the university’s Computer and Mathematical Sciences Studies department. When the aged bituminous roof coverings had shown failures including splits, blow holes and crazing, it was of paramount importance that a waterproofing solution could be provided as quickly as possible to prevent the risk of water damage and disruption.The university’s site maintenance team turned to Polyroof for a solution, which started with a detailed survey of the three roof areas totalling 750m2.The ChallengeCore tests taken at appropriate locations throughout the roof areas demonstrated that the existing warm roof build-ups were free from signs of decay. This meant that the roofs could be retained and over-coated with a new waterproofing system allowing for a rapid, minimal-disruption solution.A bespoke specification was put together based on the findings from the Polyroof Survey Report that provided a comprehensive set of recommendations, including remedial instruction for many problematic roof details. With the peace of mind and satisfaction that the various problems on the roof would be solved through Polyroof’s proposals, the client progressed with a tender process that resulted in a successful application by Polyroof Approved Contractor BBR Roofing Ltd.The SolutionPolyroof’s Protec System, a hybrid polymer liquid system with extremely fast curing and installation times was chosen as the ideal solution for the project. Due to its fully cold-applied application, the works could be carried out during the university’s term times, without having to wait for closure periods between semesters.Works began with the existing asphalt and felt coverings being made good where required, including the levelling and filling of blow holes and cracks with Polyroof Structural Repair Mortar. Next, the surfaces were thoroughly cleaned and degreased to provide a sound substrate for the new waterproofing system.Many of the roof perimeters and junctions featured parapet walls which were identified as a potential point of water ingress during the survey. The inner faces and tops were therefore boarded-over with 18mm Polyroof approved plywood which would allow these details to be fully encapsulated with the Protec System, meaning their waterproof integrity would be covered under the new system’s guarantee. Protec can waterproof vertical areas with the greatest of ease due to its thixotropic formulation, which means slumping and running is minimised during application.Polyroof’s extra-tough GRP trims were then installed to create neat and robust edge detailing for exposed perimeters before the main Protec system application commenced. After priming surfaces where required, the first coat of Protec was applied and reinforced with PolyMat 450. With its RapidCure technology, the Protec can be walked on and over-coated after only 30-60 minute after applications, meaning large roof areas can be made fully waterproofed within a matter of hours.After the second coat of Protec was applied to complete the waterproofing system, designated maintenance walkways were formed through embedding quartz sand aggregate into a third coat of Protec liquid.Completion and InspectionThe refurbishment of the roof was completed within the client’s target timeframe and budget. Following a final inspection by Polyroof Technical Services, which highlighted quality workmanship of BBR Roofing, the client received Polyroof’s trusted Accredited System Guarantee and now has the peace of mind the roof will be leak-free for decades to come.

The project had strict schedules which meant that minimal disruption to the surrounding areas was essential. A waterproofing system was required that would meet the requirements from both the public and private sectors as well as provide a contemporary, aesthetically pleasing finish.

Heslington East Campus Student Residences: Sustainable and Efficient Expansion Alongside the preservation of listed buildings, the University of York is investing in a flagship £130m development for students that promotes wellbeing, community, and sustainability. The initial phase sees 16 brand new student accommodation blocks and 2 communal hub buildings providing flexible social spaces. Surrounded by stunning lake views and natural habitats, the buildings are part of a huge initiative to expand the student accommodation offering.GOALSArchitects Sheppard Robson alongside Graham Construction sought to futureproof accommodation by incorporating multi-use buildings, including catering outlets and social hubs. Key to the brief was using the latest in safety, energy efficiency, longevity, and warranty credentials. Graham Construction’s use of modular external sandwich panels, prefabricated steel bathroom pods, and pre-assembled services distribution racks used Modern Methods of Construction with off-site construction techniques.CHALLENGESThe major challenge was to specify a roofing system that could keep up with the pace of the build, given the typical building was constructed from start to finish in circa 14 weeks.The roof deck comprised of precast concrete slabs which facilitated the works programme for speed of construction and consistency in build quality.Alumasc’s challenge was to find not only a waterproofing solution that was able to keep up with such speed of construction but also to meet a truly sustainable life cycle equalling the lifetime of the building.A key consideration in the design was the roofing materials’ thermal properties. To meet the u-value target of 0.15, Alumasc’s XPS Plus insulation was specified, providing a single layer of 175mm, which reduced the height of the overall build-up when compared traditional XPS.SOLUTIONHydrotech 6125 Waterproofing System / Derbigum Hybrid Upstands For over half a century Hydrotech Monolithic Membrane has been successfully used by architects and specifiers, ensuring some of the world’s most prestigious buildings and structures are kept watertight. With no product failures in over 50 years and guaranteed waterproofing integrity for the lifetime of the structure, Hydrotech offers a total life cycle solution for the building.Hydrotech was specified on the main roof areas for this project as it easily meets individual requirements of the buildings. In addition, the system is designed to last the lifetime of the building or structure to which it is applied, giving long-term waterproofing integrity and no future replacement costs.Applied in a hot liquid state to the deck, and including a polyester reinforcement, the bond of Hydrotech MM6125 is 100% absolute. There is no risk of water tracking below the membrane and because it is monolithic, no possibility of lap failure.DERBIGUM WATERPROOFINGDerbigum sustainable roof system was selected for the upstand areas. This hybrid solution was developed to improve the thermal efficiency in all areas to mitigate against cold-bridging with minimal insulant thickness. Derbigum bituminous membranes are high-performance waterproofing systems offering extended warranties and the highest levels of project support. The upstand zones benefited from Derbigum Mineral which is a mineral surfaced composite reinforced membrane.ROOFTOP MANAGEMENT STRATEGYIn addition to the waterproofing solution the buildings benefit from the full Alumasc rooftop management service. This included the design and supply of safety systems, accessories, and over 20 AOV smoke hatches meeting all British and European standards.Specific safe zones were designed by Alumasc Roof-Pro and positioned around all roofs for safe access. Purpose made clips for installing lightning conductor tape without roof penetration were also provided. All rooftop accessories are part of the Alumasc Roofing specification and therefore can be found back-to-back within the Alumasc 35-year system warranty.PROJECT DATACompletion: Autumn 2022 BuildingType: Student Accommodation ProductApplication: Hydrotech & Derbigum waterproofing systems Certification: BBA Approved & European Technical Approval Architect: Sheppard RobsonMain Contractor: Graham ConstructionAlumasc Registered Roofing Contractor: Tandragee Roofing

Belvedere CourtBauder Hot Melt structural waterproofing systemSynopsisThe impressive Belvedere Court 4-storey building, which was converted from a hotel into 16 prestigious residential apartments in 2008, recently underwent further development including extensions for additional accommodation, basement housing, a communal swimming pool, a theatre and an underground car park.As part of the refurbishment of the site, the failing waterproofing of the green roof on the car park roof deck needed to be removed and replaced. Bauder approved contractor, The Complete Roofing Company (TCRC), initially proceeded to remove the existing pathways and landscaping before removing the failed system and providing remedial repairs to the damaged roof.Bauder Building BoardProject:Belvedere Court​Location:Sidmouth, Devon​Roof Area:1,316m²​Specifier:The Complete Roofing Company LtdApproved Contractor:The Complete Roofing Company LtdEnvironmental Focus:Intensive green roofThe specificationWith the car park roof also being used as a recreational green roof for the residents of Belvedere Court, the Bauder Hot Melt Intensive Green Roof System was an obvious choice. The Bauder Hot Melt Bakor 790-11 EV with Polyester reinforcement creates a resistant monolithic waterproofing membrane whilst the Bauder AP2 root barrier provides resistance to the system allowing for a green roof to be installed above. As stated by BBA certificate 06/4350, this system provides a durable waterproofing solution for the service life of the structure that it is incorporated in. The resultOn completion of the waterproofing elements the roof was leak tested to ensure the roof’s integrity. The TCRC then installed the Bauder green roof components; PE foil, FSM600 protection membrane, DSE40 drainage layer, filter fleece and over 300 tonnes of Bauder intensive substrate. Finally, Rowland Gold turf was then installed with a drip line irrigation system installed under the turf. Upon final assessment, this project met the criteria to be issued a 20 year product and workmanship guarantee.System Installed1 BauderPLANT E 42Torch-on root-resistant, green capping sheet. Reinforced with spunbond polyester fleece to allow the finished product to cope with structural movement without fracture.2 790-11Hot melt rubberised bitumen asphalt with a percentage of post-consumer recycled materials that infills and fully bonds to all minor deviations in the deck.3 DeckPrimed concrete.

Low environmental impact... CHALLENGE All over the world architects and building owners are trying to create buildings with a low environmental impact. For this private house, the architect wanted to combine an aesthetical finish of a metal roof in combination with PV and hot water panels. The biggest issue for the architect was the fixing of these panels without having leak problems in the future. SOLUTION The roof was waterproofed using a RENOLIT ALKORPLAN roofing membrane that is mechanically fastened onto the supporting roof structure. Two kinds of PVC profiles were heat welded onto the waterproofing membrane: on the one hand RENOLIT ALKORDESIGN profiles (for aesthetical value only), on the other hand there are RENOLIT ALKORSOLAR profiles, which function as the base to attach the hot water and the PV panels. The gable was also finished with the RENOLIT ALKORDESIGN system.

Some of our most important public sector assets are held within the healthcare system so choosing the correct specification is critical. Often these buildings host patients or the latest medical equipment, and this centrally funded NHS project at Chase Farm Hospital was no different. This particular project hosted an array of plant and equipment for the NHS and our lightweight DANOPOL HS 1.5mm mechanically fastened membrane was chosen as the waterproofing system to be installed onto the structural metal deck. The scheme also featured a tapered insulation scheme in partnership with Kingspan Insulation designed to 1:60 falls and 0.30 w/m2 K u-value. When installed to structural metal decks, all the mechanically fastened components are mechanically fastened to the crowns only, so careful consideration must be made to ensure that any mechanical fasteners coincide appropriately. A project-specific wind uplift calculation was completed by our technical team which provided detailed instructions and fastening patterns for the mechanical attachment of both the waterproofing membrane and tapered insulation scheme. In addition to ensuring that the system will resist any applicable windload, our calculations can reduce overall frequency of fasteners, ensuring that the project is not over-engineered and ensure that the installation progresses as quickly as possible.Waterproofing Systems:DANOPOL HS 1.5mm - Light GreyConstruction Type:New BuildWarm RoofSector: Public Sector Approx. Size:2,200m2 Warranty Period: 20 Years

When developing new buildings, it is always important to consider the environmental impact. Responsible sourcing of materials is high on every priority list, along with reducing waste to landfill. But what about the local impact, such as the effects on local wildlife? A living roof/green roof system, such as the one installed by the Premier Contractor at Seaford Head Golf Club, is a very clear example of the steps that can be taken towards reducing this impact and providing an alternative space for wildlife to inhabit. A warm roof system was installed onto a structural plywood deck, after which a vapour barrier and insulation boards were mechanically fastened to provide both thermal efficiency and air leakage control. After the underlying installation had been suitably restrained in accordance with a site-specific wind uplift calculation, the roof membrane was mechanically fastened to complete the waterproofing system. Our PVC roof membranes have been tested and can be utilised without the need for additional root prevention barriers (test standard EN 13948), and because PVC is extremely lightweight, they are the perfect choice for these applications, reducing pressure on the underlying structure. In conjunction with our Living Roof/Green Roof specialists, a site-specific living roof system was supplied and installed over the completed waterproofing.Waterproofing System:DANOSA Single Ply 1.5mm - AnthraciteConstruction Type:New BuildWarm RoofSector:LeisureApprox. Size:900m2Warranty Period:20 Years

The Purple and Green MSCPs have capacity for more than 4,000 vehicles across five levels. The project’s scope involved concrete repair, structural strengthening using carbon fibre laminates, the replacement of the conduits, movement joints, drainage channels and deck waterproofing.

The five-star Cameron House Hotel is set within 400 acres of beautiful Scottish countryside on the world-famous banks of Loch Lomond. The Hotel is the prestigious home to a collection of 140 bedrooms including 24 suites. The hotel offers a variety of dining experiences, including the Michelin starred restaurant Martin Wishart at Loch Lomond.When the flat roof areas above the main kitchen and the dining area began to leak, it was imperative that a rapid waterproofing solution could be found that could be installed without disturbing operations at the restaurants below.When the flat roof areas above the main kitchen and the dining area began to leak, it was imperative that a rapid waterproofing solution could be found that could be installed without disturbing operations at the restaurants below. The roof area itself was covered with an aged felt membrane that had been treated with a variety of localised repairs which could no longer prevent water ingress. A large amount of M & E plant was present throughout the roof, and any new waterproofing system would be required to seal the numerous stanchions and plinths in a fully weatherproof condition. After researching waterproofing systems online, Cameron House Hotel contacted Polyroof Technical Services for a recommended waterproofing solution that met their stringent criteria. Following discussions, the regional technical manager carried out a detailed roof survey of the roofs. The survey report formed the basis of a bespoke specification that covered a comprehensive set of recommendations to fully solve the roof’s problems.Polyroof Approved Contractor Skyform Roofing successfully tendered the project and the refurbishment works soon began. In order to avoid disruption to the hotel’s operations the existing roof coverings were retained as a substrate for the Protec system, without the need for stripping / replacement works. Due to the complex nature of the roof, works were carried out within a phased approach with the most problematic regions being refurbished first. Loose-laid M & E plant was relocated and the felt coverings cleaned and made good as required. The remaining roof details were then prepared as necessary before being primed ready to accept Polyroof’s cold liquid-applied Protec system.A key advantage of the Protec system for phased refurbishments is its speed of application and rapid curing. Unlike moisture-curing liquid systems, Protec forms a solid, extra-tough membrane that can be walked on 30 – 60 minutes after application. Not only does this reduce labour times and keep costs down, but crucially it allows the full system to be laid in it’s entirety in a matter of hours – rather than days. With its fibreglass reinforcement, the Protec resin is able to rapidly mould around any protrusion, stanchion, plinth or upstand to quickly form a totally seamless watertight seal – without the need for any time consuming cutting or patching work. This meant that the many complex roof details were able to be rapidly made waterproof, further reducing installation times.The contract monitoring undertaken by Polyroof Technical Services allowed the contractor and manufacturer to work effectively together to ensure the roofing solution delivered on all the client’s needs. The application by Skyform Roofing was completed to a very high standard with every roof detail meticulously sealed in a fully weatherproof condition.

ROM Ltd is a specialist manufacturer of reinforcement solutions that has facilities located throughout the UK and Ireland. The waterproofing on the roof of their Sheffield manufacturing facility had exceeded its serviceable life and the main-substructure was extremely corroded leaving it unstable and requiring urgent remedial work.

Waterproofing of the 6-lane, 25m swimming pool and basement area within a new fitness and leisure complex in West Sussex, Worthing. Situated adjacent to the existing Aquarena, the centre enjoys a unique seafront view, but is also exposed to the marine conditions indicative of its location.

Cranbrook Primary SchoolBauder Total Roof System (BTRS) with Tapered insulation schemeSynopsisCranbrook Primary School in Ilford, London, was experiencing some major water ingress due to the advanced deterioration of the existing roof system. A roof survey was conducted by Stuart Parratt, Bauder area technical manager, where core test samples were taken to identify the existing roof construction to deck level and to provide an indication of the roof condition. The survey revealed that the existing waterproofing was in extremely poor condition, with extensive evidence of water ingress.  Bauder Building BoardProject:Cranbrook Primary School Location:LondonProject Type:RefurbishmentRoof Area:440m² Client:London Borough of Redbridge Council Approved Contractor:Thameside Roofing Ltd The specificationThe original waterproofing had been poorly overlaid with EPDM which had subsequently debonded. Before the installers could begin laying the new system, they had to strip the substrate back to the original asphalt. The client required a robust system that would deliver durability, value and longevity. 390m² of bitumen waterproofing, Bauder Total Roof System (BTRS), was specified for the main roof areas and 50m² of our cold applied liquid waterproofing, LiquiTEC, for an area that had limited upstands due to clerestory windows that could not be repositioned. Products appliedBauderPIR tapered insulation  A lightweight and cost effective alternative method of providing falls to a roof, whilst also providing thermal insulation. The client opted for this scheme at Cranbrook to minimise standing water on the roof. Bauder Total Roof SystemA two-layer bituminous waterproofing system robust enough to withstand foot traffic and most permanently sited plant. For use within warm and cold roof scenarios, as well as overlaying existing roofing materials. BTRS meets current UK Building Regulations Part B for external fire protection and features torch-free and safe to torch installation on combustible details. LiquiTEC Cold Applied liquid waterproofing Utilising Bauder’s PMMA cold applied liquid waterproofing on one of the roof areas ensured a fully watertight solution around rooflights and below upstands that could not be raised.  Project challengesAlthough the deck appeared to be in a reasonable condition for reuse as part of the refurbishment, there were large deflections to some areas and the existing waterproofing that overlaid the original system had been poorly installed and had pulled away from the asphalt below and so needed stripping prior to works commencing. The existing insulation was inadequate and left the building falling short of the current requirements. A thermal upgrade was incorporated into the works using a tapered insulation scheme which helped to solve the deflection issues by creating falls on the roof. To meet the minimum upstand requirements, the existing extractor vents needed to be removed to allow for the increase in the kerb height. Large continuous structural rooflights providing natural light to the building below were deemed thermally inefficient. The rooflights were upgraded during the refurbishment to meet current standards.  The resultBauder systems are only installed by Bauder approved contractors to ensure quality. The installation on this project was expertly carried out by Thameside Roofing Ltd, overseen by Dave Gregory and John White. After sign-off from Bauder site technician, Paul Osbourne, this system was awarded a comprehensive guarantee.  Systems installedBauder Total Roof System (BTRS) with Tapered insulation1 Bauder K5KHeavy duty, torch-applied SBS elastomeric bitumen capping sheet featuring a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture, and a mineral finish to provide protection against UV degradation.2 BauderTEC KSA DUO Technically advanced self-adhesive SBS elastomeric bitumen underlayer with “DUO” lap technology to ensure thorough sealing of lap joints, even in lower temperatures. 3 BauderPIR FA G16Tapered PIR Insulation board manufactured in accordance with BS EN 13165 with no facings. It is lightweight with a high compressive strength and has zero Ozone depletion potential. The product provided effective drainage as well as efficient thermal insulation.4 BauderTEC KSD FBSA technically advanced, self-adhesive SBS elastomeric bitumen air & vapour control layer, with a mica finish on the upper surface to allow easy bonding of insulation using the specified Bauder Insulation Adhesive.

The Protec System was used to waterproof the domed green roof areas of this striking, sustainable house development which was featured on Chanel 4’s Grand Designs. With an ambitious vision and a tight budget, Robert and Milla Gaukroger set about transforming a dated 1980’s house overlooking Lake Windermere into a state-of-the-art, eco-conscious home. Since the house lay in beautiful hillside surroundings, in order to blend into this setting, the domed roofs of the house were to be covered with a wildflower meadow mix to provide a green roof construction.The SolutionThe Protec System was chosen as a waterproofing membrane for the roofs as it is ideally suited for green roof applications. Lightweight, flexible and highly durable, the system can easily accommodate structural expansion movements and is tough enough to resist root penetration. The Protec system was applied to over 350m2 of domed roof to provide a long-lasting waterproofing membrane.The key reasons why Eastleigh chose Protec are the same reasons that has seen it become one of the fastest growing cold-applied liquid roofing systems in both the new build and refurbishment markets. Combined with the timber cladding to the verticals of the building, the finished aesthetics of the development blended seamlessly with the surrounding areas.A warm roof build-up that can be made waterproof at multiple stages:For larger projects the Protec system can be made temporarily waterproof at two stages prior to the application of the full waterproofing system. The first stage is upon installation of the sealed, aluminium-faced vapour barrier.The second phase follows the reinforcing of the foil-faced insulation board joints with Protec resin and taping mat. This enables a much more controlled approach to the installation with a greatly reduced chance of rain causing disruption and damage during the works.Highly flexible membrane:Regardless of the size of the roof, Protec forms a homegenous membrane, without a single joint or seam and without the need for any expansion joints.RapidCure technology for quick installation:The application of Protec as a liquid, through to the curing process where a solid, tough membrane that can be walked over, takes only 30 – 60 minutes. This enables large sections of the roof to be fully completed in a short space of time.Installing the Roofing SystemsThe Protec System provided waterproofing to all flat roof areas as well as the extensive parapet wall sections. The roof areas were made up of two designs: the Protec Warm Roof System (approx 7,500m2) and Protec applied to concrete as part of an inverted roof design (approx 1,000m2).The roof installation was carried out with a planned, phased approach that was synchronised to the wider construction schedule. For the warm roof areas, the first stage was to fill the troughs of the structural metal roof deck with acoustic insulation infills that will dampen external noise within the leisure centre. Next, the crowns of the deck were primed ready to receive the self-adhesive vapour barrier.The use of a high-performance aluminium vapour barrier not only eliminates the risk of condensation within the roof, but also provides temporary waterproofing protection, which is extremely useful on larger works such as this.The Polyroof RES Insulation boards, which comprised of a two layer system totalling 170mm to achieve a U-Value of 0.14 W/m2K, were bonded using high-performance PU adhesive to the vapour barrier. Following the wind uplift calculations it was determined that mechanical fixings were not required for this application – making for an extremely rapid installation. As you can probably imagine, fixing through 170mm of insulation into the crowns of the metal deck can be a tricky and time-consuming task.A key advantage of using a tongue and groove insulation system is that the finished surface of the roof is smooth and level without any unsightly board steps that can also lead to standing water issues. The insulation board joints were sealed using Protec resin with Polymat Taping Mat 450 which, in addition to providing additional strength to the joints, also creates a temporarily waterproof layer.For the inverted roof sections, Protec was applied directly to the primed concrete/screed surface. The membrane was inspected by Polyroof Technical Services, signed off and then covered with inverted roof components. An interesting fact when using Protec in inverted roof situations is its incredible durability performance – as tested by the BBA, Protec “can provide an effective barrier to the transmission of liquid water and water vapour for the design life of the roof in which it is incorporated”.Monitoring and CompletionThroughout the duration of the contract, Polyroof Technical Services carried out regular site visits that were reported back to Interserve as part of Polyroof’s free-of-charge contract monitoring service. This enabled the client to keep up-to-date with the progress of the roof installation in detail and also provided peace of mind that the original specification was being closely followed and implemented.Polyroof worked closely with the Roofline Group during the installation, enabling the challenges were identified and solved in an efficient and coordinated manner – saving the client time and money.

A busy recycling centre in Coedcae Industrial Estate, Pontyclun South Wales, suffered from a crippling fire that destroyed one-third of the building leaving the rest in severe disrepair from fire damage.Garland Technical Manager, Dale Thomas, was instructed by long-term partner Cushman Wakefield to assess the extent of the damage and secure the optimum waterproofing system to get the warehouse unit returned to its former glory as a hive of activity for the local area.Dale conducted a thorough condition survey and supplied a detailed written report to the client, highlighting the severity of the building damage and the poor condition of the existing roof sections and walls. Approximately 2,000 sqm were either damaged beyond repair or had fallen into a state of disrepair, meaning that a full refurbishment of all roof and wall sections was required before the optimum waterproofing system could be implemented.

As described by Eastleigh Borough Council, the £25 million facility underpins the council’s commitment to promoting a healthy borough. It incorporates a high quality design in keeping with the parkland environment and has high environmental standards. The new building will boast many facilities that are larger than at present, including an eight-lane, 25-metre swimming pool, a larger, versatile learner pool, 15-badminton court sports hall, a versatile, multi-station gym and a group spinning studio. This case study will look at the challenges and solutions of this vast project that involved insulating and waterproofing over 8,500m2 of flat roof areas.Following decades of experience using Polyroof’s liquid systems to protect buildings throughout the district, including waterproofing the original Fleming Park Leisure Centre back in the early 1990’s, Eastleigh Council specified the Protec system for the project.

Originally designed and constructed as a basement car park for the offices above, the building was renovated and converted in to a luxury hotel. The car park became a habitable space including the kitchens and associated storage. A waterproofing solution was required for both the concrete walls that were to remain and for a new replacement concrete slab.

As part of the refit, the building required a new roof as it was showing signs of wear and had started to leak. As well as a waterproofing solution, the client wanted to improve the thermal performance in line with current building regulations. For health and safety reasons, the client also requested a flame free roofing solution.

The circular building, where legends like The Rolling Stones, Jimi Hendrix and Pink Floyd began, was redeveloped and reopened in 2006. FOAMGLAS® insulation was used for the floor, the façade and the flat roof, ensuring water and vapour resistance despite the open nature of the façade. It is also non-combustible and waterproof.

Colchester’s Visual Arts Centre is a stunning, crescent-shaped building that treads lightly and shouts loudly. The elegant roof and façade are 100% waterproof thanks to FOAMGLAS® cellular glass insulation. The insulation is covered in Tecu gold sheets seamed and fixed into position, giving this architectural marvel a golden glow.

A friendly and welcoming school based in Blackburn in the North West of England, St Stephens Church of England Primary School is a place where pupils can develop their skills in a school that is proud of its Christian values and high standards of teaching. The school has been praised for its philosophy of continuous improvement by a recent ofsted inspection, providing a nurturing environment for children.Continuing the high level of teaching facilities was paramount for the school, and after discovering that the gutters and parapets of the building were aged and leaking, it was vital that a solution was found before this caused issues.The ChallengeIn coordination with Polyroof Products Ltd a survey was scheduled to take place at the site to determine the exact nature of the issues and formulate a solution. Upon inspection it was discovered that the existing waterproofing consisted of a single-ply membrane which had become aged with various leaks being reported and localised repairs carried out with not much effect. The underlying build-up consisted of a galvanised steel metal deck and had been coated in plasticol. Once the survey was complete it was clear that the gutters and capping’s would benefit from a high-performance waterproofing system installation, this would protect from further leaks occurring.The SolutionThe System of choice for this project was Protec Xtraflex. Protec Xtraflex is a highly flexible version of the Protec system designed for coating gutters. Its fast curing technology and imperviousness to standing water fulfilled the rapid solution needed to offer durable waterproofing performance for this project. Taking into consideration the information obtained from the survey, a bespoke Polyroof specification was created to combat all of the issues discovered. The chosen Polyroof Approved Contractor to carry out the work on this project was the KSD Group, a contractor with a wealth of experience in the roofing and construction sector.Once all these aspects were in place, work could officially begin. Firstly, it was highlighted that falls and drainage were already present, so the Polyroof specification made use of the existing falls, combining this with the chosen waterproofing system. During this project, there was no need to strip back any of the existing waterproofing. It was made good where required, allowing a smooth substrate for the new system to be bonded to. Once this stage was complete, the area was cleaned and prepared for the new system by removing any dirt and debris. The Protec Xtraflex system was now ready for installation. Firstly, all surfaces that required it were primed, including the single ply existing waterproofing, which required a Polyroof SP Primer 202. During this installation, all lap joints and bolt heads were applied with Polyroof Butyl Tape and Polyroof Butyl Lap Tape, reinforcing these points before application. Pre-formed high-quality Polyroof drip trims were installed to the outer edge of the metal capping, and new flashings were also installed to cover the exposed insulation at this detail.The first coat of Polyroof Protec Xtraflex was applied to the substrate. This consisted of Xtraflex resin and Polymat 450 and was allowed to cure. Due to the rapid cure technology of the system, this only took 30 – 60 minutes, allowing for quick installation. Once complete, the second coat of Protec Xtraflex Resin was installed and allowed to cure.CompletionThe project was efficiently managed by both the contractor KSD Group and regular Polyroof Technical Services visits to ensure that each aspect of the project from start to finish was carried out within the client’s specification, time frame and budget. The project was a great success showing the high-quality work from KSD Group. The customer can now be confident that this new Polyroof Protec Xtraflex membrane will last for many decades to come.

The project consisted of two similar flat roof areas totalling 1,100m2 above high-rise residential blocks in a city centre location. The existing roofs were an inverted roof design that had been waterproofed with single-ply that had failed prematurely. Numerous short-term, localised repairs had failed to stop the water ingress and leaks had been a long-term problem.It would have been impractical to remove the tons and tons of ballast and insulation from the top of the high-rise building and it was imperative to the client that removal or replacement works were not involved at all. The specific nature of this project required careful consideration, and so a survey of the roof was arranged.The SolutionA report from an independent consultant commissioned by the client identified a problematic challenge with an overlay option. The existing falls of the roof were assessed to be poor, and so standing water would be an issue for any new waterproof covering. The report concluded that this would reduce the lifespan of an overlay waterproofing system and so was advised against. The client initially thought this to be a stumbling block and that costly and impractical modifications to the roof would need to be made.Having worked with Polyroof on scores of other projects, the client turned to Polyroof Technical Services for a solution that could meet their stringent criteria. Following on from the preliminary discussions, Polyroof’s Technical Services assessed the site, taking core samples and then providing a suitable specification to overlay the roof with the Protec System.The BBA certification of the Protec system specifically covers use for zero falls (completely flat) applications, meaning the client had absolute peace of mind that standing water would not be a detriment to the integrity of the waterproofing system. The client was able to achieve the original objective of an overlay system and benefited from the associated cost and time savings. Furthermore, the BBA certificate states that when used in inverted roof scenarios the lifespan of the Protec system is as long as the design life of the roof.Work was started with J R Flat Roofing, a Polyroof approved contractor with national coverage, moving the ballast and insulation to one-side in four phases of 140m2 at a time, exposing the single-ply membrane to which the Protec system was directly applied.Due to Protec’s rapid cure and walk-on times (30-60 mins dependent on conditions), the system is ideal for larger, phased refurbishment, as specific sections of the roof can be made waterproof with the full Protec system in one day. When carrying out the next section, the new Protec membrane forms a totally seamless and watertight joint to the existing Protec-covered areas.Another objective was to reuse the original inverted insulation and ballast pebbles as this was cost saving and negated the need for the lifting logistics that would have been involved in bringing the ballast to ground level. Additionally, it made the process as environmentally compliant as possible by keeping waste to a minimum. The insulation and pebbles were re-applied in its original format and, due to the weight of the pebbles, was a mammoth task that required three miniveyors to help with the handling. A series of special aluminium breather vents were also fitted down to the concrete slab roof substrate to enable the surface to dry out over a period of 12 months.The whole job was completed in three weeks and the client was delighted with the finished work. With a 20-year insurance back-guarantee and a maintenance-free waterproof membrane that will last as long as the roof stands, the client was once again left with total peace of mind that their buildings could not be better protected.

Castlebar Government OfficesBauder Total Roof System (BTRS) and BauderThermofol PVC single ply waterproofing systemSynopsisThe roof area of this government office building was complex due to expansion joints, air conditioning units and intricate detailing requirements. Work hours had to be agreed with the client to keep disruption to other ongoing work at the site to a minimum and insulation upgrades were necessary to satisfy building regulations. The office also had to remain open throughout the works, causing some logistical challenges. All deliveries were timed so not to cause any disruption to visitors coming in and out of the facility.Bauder Building BoardProject:Castlebar Government OfficesLocation:Castlebar, Ireland​Roof Area:2,500m²Specifier:Office of Public Works​Approved Contractor:Deane Roofing & Cladding​The specificationBauder’s bituminous system, BTRS, was specified because it is durable, robust and can withstand permanently sited loads of up to 2000Kg/m². The system build-up included Bauder’s 100 mm Thermotech Glass insulation for superior thermal performance, ensuring the roof achieved the required 0.17 U-Value. Small linking roof areas were waterproofed using Bauder Thermofol PVC single ply system, which is long lasting, possessing high tensile strength of over 1100N, and allows for no physical penetrations of the roof.Products appliedBauder Total Roof SystemIntegrated bituminous waterproofing system with a life expectancy in excess of 40 years.Bauder Thermofol PVC1.5 mm single ply membrane can be guaranteed for up to 20 years depending on system type.System installedBauder Total Roof System (BTRS)1 Bauder K5KA heavy duty, torch-applied SBS elastomeric bitumen capping sheet, featuring a spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture. The mineral finish provides protection against UV degradation.2 Bauder ThermotechPIR insulation board with a coated glass tissue facing on both sides.3 BauderPIR FA-TEAn efficient PIR insulation board with aluminium foil facing on both sides. The top facing features a printed grid pattern to aid site cutting. It is lightweight and has zero ozone depletion potential.4 BauderTEC KSD FBSA self-adhesive SBS elastomeric bitumen air & vapour control layer, with a mica finish.Bauder Thermofol PVC single ply waterproofing system1 Bauder Thermofol U15 FRA 1.5mm thick, reinforced PVC waterproofing membrane. Stated within BBA certificate 06/4354, the Thermofol PVC waterproofing membranes have a service life in excess of 35 years. 2 Bauder PIR MTissue-faced flat board insulation, benefitting from a zero ODP and a Green guide rating of ‘A’.3 BauderTEC KSD FBSA technically advanced self-adhesive elastomeric bitumen air and vapour control layer with an aluminium foil facing for vapour impermeability.AdvocacyProject specifier, Tony Collins, Office of Public Works:“Bauder delivered a comprehensive roofing solution that utilised their top quality products and unrivalled technical support. Despite the design and logistical challenges encountered, the new roof system was delivered on time and to budget much to the delight of the client” 

Chelmsley Wood Shopping CentreBauderflex bituminous waterproofing systemSynopsisChelmsley Wood Shopping Centre, located in East Birmingham, was experiencing leaks with their current flat roof waterproofing system and so they needed a quick, high quality solution to remedy the situation. Although competitors had suggested the only option was to strip the roof, Bauder found a more cost-effective answer by using our in house Troxler Moisture Gauge to identify any areas of wet roof construction, removing the saturated areas and then overlaying the whole roof area.Bauder Building BoardProject:Chelmsley Wood Shopping Centre Location:BirminghamProject Type:RefurbishmentRoof Area:4500m²Specifier:Black Cat ConsultancyApproved Contractor:BBR Roofing LtdProject challengesThe works were to be undertaken in the middle of winter on the existing single ply covering which kept freezing when the operatives were drying the surface. Fixing down of the insulation boards (to the existing waterproof covering) was a noisy operation which also exposed the retail tenant below to risk of water ingress. Work had to be undertaken on a roof where ridges and valleys had to be navigated whilst managing the waterflow.The specification allowed for the removal and replacement of the saturated areas as identified by our moisture mapping survey. This operation had to be planned to ensure that the retail stores were not put at risk in terms of water ingress, but still managed to keep the works progressing to schedule. This was particularly difficult due to the exposed site and the inclement weather encountered. The resultAs a result, Large sections of cable bespoke design had to be developed with Bauder to overcome these challenging site details without the need to decant the retail tenants below. trays and handrails had to be lifted in situ so the roof works could be completed without compromising electrical or mechanical install.By working closely with the centre, a method of work was developed which fulfilled these criteria in terms of waterproofing, health and safety and business protection of the shopping centre. System installedBauderflex bituminous waterproofing system1 BauderFLEX K4EA torch applied SBS elastomeric bitumen capping sheet, featuring spunbond polyester reinforcement to allow the finished product to cope with structural movement without fracture.2 BauderTEC Sprint DUOA self-adhesive elastomeric bitumen underlayer with DUO lap technology. This product has a glass fleece reinforcement feature for stability and strength.3 BauderPIR FA-TEFlatboard insulation boards containing rigid polyisocyanurate (PIR).4 BauderTHERM DS 1 DUOA self-adhesive SBS elastomeric bitumen air and vapour control layer (AVCL) with patented “DUO” lap technology to ensure thorough sealing of lap joints, even in lower temperatures.

Combining all three types of waterproofing system (Types A, B and C) supplied by Triton Systems, at the time of construction this project was believed to be the UK’s largest domestic basement. The three storey habitable space below ground was retrofitted under the existing property, and extends beneath the new build adjacent luxury apartment blocks.

Rhepanol fk from SIG Design & Technology was chosen to waterproof five areas of roofing with a total area of 949 m2 on a residential scheme at Worcester Park, Surrey. Built by a national house-builder, the residential complex at 68-72 Salisbury Road comprises three new-build blocks of terraced-style homes.

The JG Graves Woodland Discovery Centre is being constructed in the Ecclesall Woods Sawmill as part of the Sheffield Woodlands Environment Enhancement Project.The centre runs craft courses all through the year from cider making to wood work skills. Public events in the autumn and spring celebrate Sheffield’s rich woodland heritage and demonstrates the unique facilities of the centre, as well as providing activities such as story telling, discovering nature and traditional uses of wood in the home and garden.The SolutionThe project entailed designing a center that harmoniously blended with the enchanting surrounding woodlands. The main building featured a grand ‘ski slope’ style roof, initially planned to be waterproofed using metal sheets. However, the client quickly realised that this approach would be prohibitively expensive.To meet the client’s requirements for a cost-effective alternative that maintained the intended appearance, they turned to Charlesworth Contractors—a Polyroof approved contractor with a proven track record of excellence. Recognizing the need for a swift and efficient waterproofing solution, we recommended the BBA Approved Polyroof 185 System with Lead Roll Effect trims.The first step involved fixing high-quality plywood boards onto the roof’s support beams to create the ski-slope shape. This foundation was then enhanced with GRP trims meticulously applied to replicate the appearance of traditional lead rolls. Finally, our renowned Polyroof 185 System was expertly installed, swiftly forming a seamless and highly durable waterproofing membrane.The implemented solution not only met the project’s time constraints but also exceeded expectations in terms of performance and aesthetics. With a 20-year insurance-backed guarantee, our Polyroof 185 system provided the client with peace of mind, assuring long-lasting protection for the roof. Furthermore, not only did our solution prove to be an attractive alternative to metal sheets, but it also offered significant cost savings.The successful collaboration between Polyroof, Charlesworth Contractors, and the client resulted in a waterproofing solution that seamlessly blended into the natural surroundings of the woodlands. Our advanced liquid roofing system, coupled with expert craftsmanship, delivered an outcome that was both visually appealing and economically viable. With the Polyroof 185 System, we demonstrated once again our ability to provide efficient, durable, and cost-effective solutions for even the most challenging roofing projects.

Canberra HouseBauder Cold Applied LiquiTOP SystemSynopsisCanberra House is an office facility in Swindon. The existing single ply PVC waterproofing system roof was leaking and so Bauder carried out a full site survey. The resultant report gave the client several options to rectify the leaking roof.Bauder Building BoardProject nameCanberra HouseLocationSwindonProject typeRefurbishmentRoof size985m²SpecifierRapleys LLP (Bristol)Approved contractorCentral Roofing & Building Services LimitedThe specificationThe LiquiTOP system was chosen as it can be applied directly to the prepared and primed existing single ply covering. The liquid system allowed us to get into tight spaces and without the need for any hot works.LiquiTOP is excellent on refurbishment projects where the complexity of the roof involves intricate areas to be detailed that are not easily achieved with a sheet membrane, or the actual working space on the roof is constricted.Project challengesLarge areas of plant and machinery were situated just above the roof level making access to the areas below difficult with the plant in-situ. The available budget on this project did not allow for lifting or removing the plant, stripping the existing waterproofing system, and replacing with new. Therefore, the decision was made to overlay the existing single ply membrane with a cold applied liquid waterproofing which can be installed without the need to raise any plant.To overcome drainage challenges, secondary upstands were created under the plant and fabricated channels placed underneath allowing water to flow through to the drainage points.The resultBauder was able to offer a cost-effective solution without the necessity to remove or decommission the roof mounted plant and machinery. Cost reductions were achieved for the client by overlaying the existing roof, negating any need to strip existing materials, and not having to remove or raise the plant.The works were carried out by Central Roofing who manged the project impeccably and also finished ahead of schedule.System installedBauder Cold Applied LiquiTOP System1 LiquiTOP PU cold applied liquidA moisture triggered curing polyurethane waterproofing resin; applied in 2 coats, reinforced with Bauder LiquiTOP Glass Fibre Mat.

Gowriehill Distribution Service Reservoir is located in Dundee City and managed by Scottish Water. In late 2021, part of the reservoir tank construction was discovered to have a brittle asphalt waterproofing layer over the top of a beam and block roof. Fosroc proposed a solution that was easy to apply and provided a robust watertight finish and a 20 year warranty.

The reservoir had an estimated 180 metres of cracks that needed repair, as well as the main element of the concrete that required coating to waterproof and add durability to the concrete structure. The Reservoir was taken out of commission but it needed to be returned to service as soon as possible. To do this, we looked at the order of the processes to ensure the tight time frames could be met.  

Following successful works for the London Underground, Koster were asked to design waterproofing systems for use inside live tunnels for the Glasgow Underground. Following close analysis of the structure, surrounding ground and constant use, a bespoke design was settled upon which involved an area injection system as the main form of waterproofing protection.Koster Injection Gel G4, an acrylic injection material was selected, mainly due to the fact that it has an extremely low viscosity and will not contaminate ground water or soils.When injected in a grid pattern across the substrate (through pre -installed injection ports), it will travel through the pores of the brickwork and "Gel" forming a permanently elastic mass capable of holding back the pressure of water behind the structure.The Koster Technical team become heavily involved in these types of projects, working carefully with the design team and contractors ensuring a successful project completion.For more information or for advice on a similar project, please contact the Koster Technical team on technical@kosteruk.com.

Blue-green roof solution on a London dwellingCHALLENGE8a Belmont Street comprises two unique semi-detached dwellings, which have been constructed in Chalk Farm, London by a private developer Maygrove Projects in collaboration with Martin Evans Architects. The total roof area covers only 55.03m² but features an unusual roof design; it is divided into five sections comprising two glazed roofs and three blue roof areas. For this warm roof construction, an alternative durable waterproofing was sought, suitable for blue roof application. SOLUTION Approved Roofing Contractor Gribben Solar Roofing provided an alternative blue roof solution to the original design proposed by the project architects, fully complying with their needs. Together with partner and single ply manufacturer RENOLIT they proposed a waterproofing solution for the blue roof in the form of a fully bonded RENOLIT ALKORPLAN L35A77 membrane, to be combined with the RENOLIT ALKORPLAN Green roof system. So, actually, a blue-green roof!

Den CourtBauder Thermofol single ply waterproofing systemSynopsisConstructed in 1977, Den Court is a large retirement home made up of 24 flats in the small town of Lochgelly in Fife. The regeneration of the sheltered housing by Fife Council involved the demolition of part of the building as well as replacement windows and doors, landscaping and a new car park.Bauder Building BoardProject:Den Court Care Home, CardendenLocation:Lochgelly, Fife, ScotlandProject Type:RefurbishmentRoof Area:1200m²Specifier:Fife CouncilApproved Contractor:Greenroof UKThe specificationThe client was clear that lead effect rolls were essential for this projects roof. In order to achieve this whilst keeping with the original roof of the building and with the other buildings of the area, Bauder’s Thermofol PVC system was specified and approved contractor Greenroof (UK). The resultDuring installation, the approved contractors hand-crafted over 2,000 linear meters of timber battens wrapped in the Bauder THERMOFOL U15 Fleece Back waterproofing membrane. These were then installed on to the 1200m² roof area.Thanks to the hard work and craftsmanship deployed by the approved contractor and the high-quality products used on the project, following a roof inspection from an expert Bauder Site Technician and a leak test, Bauder was able to issue a 20-year product and workmanship guarantee to the roof. System installedBauderThermofol single ply waterproofing system1 Bauder THERMOFOL U15 V FR1.5mm fleece-backed reinforced PVC membrane2 BauderPIR MTissue-faced flatboard insulation3 BauderTEC KSDElastomer bitumen air & vapour control layer, self-adhesive membrane

Fulham JettyBauder Bakor 790-11 hot melt structural system with Bauderflex waterproofing system and BauderGREEN sedum systemSynopsisFulham Wharf is a landmark regeneration scheme that began in 2013 and included the ecological enhancement of an abandoned jetty on the River Thames. This redevelopment was designed to provide the local community with an ecological education centre and bio-diverse wildlife reserve.Bauder Building BoardProject:Fulham JettyLocation:LondonRoof Area:1,000m²Specifier:FabrikApproved Contractor:Accurate RoofingProject challenges One of the major challenges for this roof was installing the central sloped section, which required exceptional levels of technical input and workmanship. This roofing area was waterproofed with the same bituminous green roof system as the upper roof; however a special timber design for retaining the substrate and sedum blanket was also needed. Since its official opening in October 2013, the lower wildflower roof has become a haven for a variety of different birds and insects.The resultThe building’s new roof swoops down to become a continuum with the jetty deck and is covered with a green habitat providing three distinct environments for wildlife; one on the flat roof, one on the slope and the third on the jetty deck. The education centre roof was waterproofed with Bauder’s root resistant bitumen membrane before then having a sedum blanket fitted. On the lower roof, 650m² of Bauder’s hot melt structural waterproofing was installed along with a wildflower blanket, providing an instant carpet of vegetation. Systems installedBauderflex bituminous waterproofing system1 BauderPLANT E 42A torch applied, SBS elastomeric bitumen capping sheet. The product features chemically treated bitumen to deliver superior root resistance which has been tested and approved by the FLL. The membrane is reinforced with 250g/m² spunbond polyester fleece to allow the finished product to cope with structural movement without fracture.2 BauderTEC SPRINT DUOSelf-adhesive bitumen underlayer with “DUO” lap technology to ensure thorough sealing of lap joints, even in lower temperatures. The product features a glass fleece reinforcement for strength and stability. The product benefits from cleaner, safer, and faster installation than traditional torch-applied membranes.3 BauderPIR FA-TELightweight, PIR flatboard insulation board with aluminium foil facing on both sides. This product has zero ozone depletion potential.4 BauderTEC KSD FBSSelf-adhesive air and vapour control layer with a mica finished upper surface to allow easy bonding of insulation using the specified Bauder Insulation AdhesiveBauder Bakor 790-11 hot melt waterproofing system1 BauderPLANT E 42Torch-on root-resistant, green capping sheet. Reinforced with spunbond polyester fleece to allow the finished product to cope with structural movement without fracture.2 790-11 with reinforcement layerHot melt rubberised bitumen asphalt with a percentage of post-consumer recycled materials that infills and fully bonds to all minor deviations in the deck.3 DeckPrimed concrete.Bauder XF 301 Sedum system1 BauderGREEN XF 301Sedum vegetation blanket instantly providing at least 90% coverage on an extensive green roof. Integrated water retention and filter layer.2 BauderGREEN AL 4040mm high perforated edge/drainage trim frames and retains the Bauder XF 301 sedum system.3 BauderGREEN SDFMulti-functional drainage and filtration layer which prevents the roots of sedum plants from becoming waterlogged.4 BauderPLANT ETorch-on root-resistant capping sheet green