"roofing membranes"

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!

Location: Canary Wharf, LondonMain Contractor: Canary Wharf Contractors LtdWood Wharf B2 is a modular construction project located on the edge of Blackwall Basin, Canary Wharf.All 279 serviced apartments were manufactured at their specialist construction site, fitted with kitchens and bathrooms and even furniture — before being transported to the site and craned into position.OBEX supplied fire-classified membranes that have been developed specifically for modular construction, including the 0400FR Class B Modular Roofing Membrane, as well as the 0223FR Class A2/W2 Breather Membrane.Storeys: 21Apartments: 279OBEX Fire-Rated products required: 4

The Durham Gateway project is a major new development at the Durham University that houses a variety of departments. Although aesthetically stunning, the concept presented several challenging issues.The project was carried out to a BREEAM ‘Excellent’ Standard and as such only used components that had minimal environmental impact. Cold-applied liquid roofing membranes, such as those manufactured by Polyroof, have been recognised by BRE to help roofing elements achieve up to an A+ rating (depending on the roof construction).Part of the works involved the construction of three curved roof areas that required a high-performance and durable waterproofing system which was to be covered by a timber shingle system. The shingles were supported by over 1,170 steel stanchions – all of which were seamlessly waterproofed with the Protec System.The main contractors of the project, Laing O’Rourke, were able to achieve the visual impact they wanted with the peace of mind that the roof was protected by a totally seamless and highly durable waterproofing membrane.

Celebrating its 50th anniversary in 2019, the iconic Bell’s Sports Centre in Perth, needed a new roof to protect the building. With the previous roof membrane nearing 30 years old the centre needed a long-term and robust roofing solution. The product of choice was the mechanically fixed Sarnafil S327-15 EL Light Grey as it is more than able to cope with all the extremes of the Scottish weather and has been certified by the BBA to last in excess of 40 years. The durability of the single ply material ensured a long-lasting solution for the project.

Family houses renovated... CHALLENGE 134 single family houses needed to be renovated to liveable conditions. The main problem for the architect and building contractors was the fact these houses had to remain occupied during the works. SOLUTION For the roof two prefabricated timber roof elements covered with the RENOLIT ALKORDESIGN roofing system were installed to replace the existing roof structure. The roofing elements consisted of a layer of OSB, a layer of 350 mm cellulose fibre insulation, another OSB plate and a 2 mm thick RENOLIT ALKORPLAN roofing membrane. The prefabricated roof element has a U-Value of 0.11 W/m². On top of the prefab roof elements hot water panels were installed. 

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

Ghent Diamond CHALLENGE The Ghent Diamond is proudly overlooking the Ghent-Sint-Pieters railway station and surrounding neighbourhood. On top of a stonelike base with a pattern inspired by the city of Ghent’s historical architecture, an impressive crystalline edifice rises. The 33m high office building has – as the name indicates – not only the brilliance, but also the shape of a gigantic, polished diamond with numerous facets. The special design makes the building unique, and that is exactly where the difficulty lies: roof surfaces with different inclines, steep and hard-to-reach slopes, kinks in the façade and a serious wind load. On the pitched roof segments connecting the glass facade, an exterior roof finish with Linius RENSON blades is to be installed. Just for aesthetic reasons! Such a finish creates a nice play of light, shadow and reflection. But this can only be achieved if the finish has been executed perfectly! But how to execute the construction so precisely, and at the same time be perfectly watertight? A true challenge for both architect and roofing contractor. SOLUTIONFor the internationally renowned New York-based architects practice Asymptote this monumental Diamond project is just another jewel in the crown. Innovative and visionary, they always pursue extreme and experimental challenges. And yes, this impressive Diamond really was a challenge, especially for the Belgian ROTEAM roof experts. The special shape, the height and the different slopes up to 47° made it a complex, gargantuan waterproofing project. On top of the steel deck structure tongue and groove insulation panels were installed. This guarantees a strong, perfectly fitting and smooth construction. After all this is very important in order to achieve this monumental task. The high wind load and shear forces were decisive for the choice of roofing membrane to be used on this difficult structure. Asymptote architects therefore opted for the mechanically fastened RENOLIT ALKORPLAN F membrane. This PVC-P roofing membrane is specifically suited for such a project, thanks mainly to its flexibility, lightweight and long life.

Passive Purple used here on timber frame as a waterproof airtight liquid vapour control membrane

Container City is an outstanding example of upcycling architecture in the London Docklands. The buildings are constructed from old shipping containers that have been refurbished and then fixed and welded together, creating an innovative modular building solution that houses offices.The roofs had been waterproofed with an EPDM membrane as part of an inverted roof design, however due to failings within the roof coverings leaks were occurring.It was also felt that the inverted roof insulation was unable to provide satisfactory thermal performance, leading to excessive fuel bills during winter. The architect responsible for finding a solution used Polyroof’s Solution Finder Tool to quickly find a recommendation for improving the thermal properties whilst providing long-term waterproof protection. Equipped with the key information needed, the architect specified the Protec Warm Roof System for the roof refurbishment works.Polyroof Technical Services carried out a full technical survey of the existing roof to identify all existing issues and provide a full set of recommendations. One of the key drivers for the refurbishment was the ability to easily access the roof membrane to carry out regular cleaning and maintenance works, so the specification included for converting the roofs from an inverted roof to a warm roof design.Polyroof Approved Contractor A R Roofing Ltd began by stripping away the old inverted roof components and the failed EPDM membrane to expose the metal roofs of the containers below. A self-adhesive vapour barrier was then laid onto the metal decks and Polyroof RES Insulation (T&G) was bonded on top using PU adhesive. Lastly, the Protec system was laid direct to the insulation boads to create a seamless, smooth and long-lasting finish that came with a 20 year insurance backed guarantee. This striking piece of upcycled architecture now has a roofing solution to match the innovation behind its creation.

refurbishment project posed particular challenges in respect of the flat roof, which consisted of a solid concrete deck, followed by screed laid to falls, a thin dense concrete layer and three bituminous membrane layers. The new roof specification required the application of new insulation to upgrade the thermal performance and a new single ply waterproofing membrane. Due to the location of this project and the presence of existing bonded layers, adhesive application was ruled out at an early stage and a mechanically fastened solution was sought.Initial pull-out tests confirmed that fixing was required through the existing screed and direct into the concrete deck. With the roof’s high exposure rating and dimensions, wind load calculations indicated that only corner and perimeter zones should be used, which demanded a high density of fasteners in these areas.the solutions provided by SFS included its TIA adjustable fastener in combination with the isoweld® 3000 heat induction welding system. This fastener system included specially coated isoweld® stress plates combined with 230mm and 300mm FI-R-20 sleeves and the 150mm long TIA fastener. These were installed through the insulation and screed layers and were mechanically fastened into the concrete substrate.The fasteners were applied through the insulation boards in a field fix grid pattern followed by the Protan SE single ply waterproofing membrane, which was then installed using the specialist isoweld® 3000 system, welding the membrane directly onto the isoweld® stress plates. This provided an extremely secure fix, without having to duplicate fasteners, and the associated drilling, and without the need to penetrate the waterproof membrane as would be necessary on seam fix systems.

Hundreds of homes have been refurbished as part of a multi-million pound revamp of housing association properties.Tristar Homes spent £8m on the scheme at Kennedy Gardens in Billingham where they carried out work on 225 properties across the three housing blocks as well as creating 12 new one and two bedroom homes which have been made available for rent.The development, completed in September 2014, includes the fitting of new windows, new bathrooms and improved living space due to the new balcony extensions.The roof area before its refurbishment had a U-value of 0.4 W/m²K. This existing build-up would not have met the requirements of the current building regulations Part L.The lower roof had been overlaid at least twice since its original construction. In all but one core sample, the existing insulation was wet through and therefore it was apparent that 90% of the existing roof build up needed stripping to the original asphalt. A further inspection was needed when the asphalt was exposed to ascertain the condition and depth of the asphalt. The asphalt was deemed in reasonable condition so the new system could be installed onto the original asphalt.IKO worked with installing contractors BriggsAmasco to refine the roof specification and recommended IKO Mach One single layer bituminous membrane system, installed to the recommendations of wind uplift calculations and performing to a 0.18U value as per requirements.IKO Mach One membranes are a robust, flame-free, single-layer roofing system with added fire-retardancy. IKO Mach One can be mechanically fastened, ballasted or bonded with polyurethane adhesive.A 20-year insurance-backedfire retardancy guarantee was issued to cover all materials, design and workmanship covering contractor insolvency.

The multi-million pound refurbishment project saw the iconic building and its landscaped gardens restored to their former glory. Axter’s cold applied liquid waterproofing systems delivered a high quality solution to this challenging refurbishment.Systems in useStarcoat® QCStarcoat® PMMAKensington Roof Gardens is one of London’s best known venues, once famous for its flamingos and celebrity guests. The Grade II listed gardens were designed by landscape architect Ralph Hancock and date back to the 1930s. The venue features one of Central London’s most famous intensive living roofs and also includes an indoor restaurant, entertainment space and elevated terracing.ChallengesThe refurbishment of Kensington Roof Gardens was technically demanding. This was due to the complexity of the waterproofing details and space restricted installation locations as well as the specific waterproofing requirements.The refurbishment of the pond and waterways required a liquid waterproofing system that is proven to be safe for aquatic life, is UV stable and meets the aesthetic requirements. In addition, the waterproofing for the elevated terraces and walkways needed to be robust, rapid curing and appropriate for high traffic areas with a high quality, anti-slip finish.SolutionsAxter’s Technical Sales Team was able to provide BBA approved liquid waterproofing specifications for both areas. Axter ensured the highest quality waterproofing installation in all areas.Starcoat QC flame free single component PU resin waterproofing was used for the pond and waterways. The system cures fast in just 4-8 hours depending on the conditions and creates a tough, seamless, elastomeric membrane. This makes it ideal for complex refurbishment projects, such as Kensington Roof Gardens, where effective bridging of cracks and resistance to structural and thermal movement is essential. The robust, solvent free membrane also simplified the waterproofing of the site’s complex details and is resistant to chemicals and root penetration.The Starcoat PMMA (polymethyl methacrylate) two component waterproofing, used on the walkways and terraces, is zero fall accredited, hard wearing and can withstand significant loading and mechanical stresses. Available in a choice of colours, traffic and anti-slip finishes, it also provides an excellent solution for complex detailing and challenging application areas.AcknowledgmentsThe refurbishment of the iconic Kensington Roof Gardens demonstrates the versatility of our Starcoat PU and PMMA liquid waterproofing systems. Working closely with our partners, we were able to provide a high-quality technical solution that benefits from a 25-year system guarantee.Phil Wilcox Moore, Managing Director at Axter

The post-industrial area of Hackney Wick has, in recent years, undergone large-scale regeneration.Sitting on the site of a dilapidated Wallis Road factory and yard space, this mixed-use development with 44 luxury loft apartments and 2000 sqm of commercial workspace retains the character of the area.SystemQuadro porcelain paving tiles in the shade ‘Crema’ were used across each of the private balconies, as well as on the roof terrace.Tiles were supported by various RYNO height-adjustable pedestals.Ease of InstallOn roof terrace areas, RynoPaveSupport RPF Adjustable Paving Pedestals were used to support porcelain tiles.RPF Pedestals raise the tiles off the roof, allowing for fast drainage and maintenance access when required. They have a large supporting base, which protects the roofing membrane.

Using materials, shades and textures that work in harmony with rural surroundings is always an important consideration for designers and planners. In Hertfordshire an ancient barn has recently been converted to provide additional accommodation for the nearby house.The new roof of the C16th barn was constructed with Cadisch Welltec perforated profiled aluminium panels over a waterproof membrane. Visible roof lights on such an ancient barn were not permitted but some light is able to penetrate through unobtrusive roof lights which are entirely covered by the perforated Welltec. The outline of the windows can just be made out in the photograph.The corrugated effect of the Welltec already lent a rustic charm to the roof and the owners needed a coating for the aluminium that would both protect the roof and also give the appearance of an old building.Taking inspiration from natural elements, EvolutionTM powder coatings allow architects and designers to achieve the look they need, together with using the most appropriate materials for the job and satisfying planning requirements on a local level.  The panels and ridge cappings totalling over 200 square metres, were pre-treated in a chrome-free system and powder coated in EvolutionTM ‘Peat fire’ at Powdertech’s Corby plant, before being delivered to site for installation. Peat fire is an earthy shade, instantly giving an aged look to the roof. It is a shade that one might expect on a weathered ‘tin roof’ – but in this case the metal stands the Evolution™ system.”  BenefitsA wide range of effects to reflect the patinas that occur naturally on metalsExcellent visual and tactile detailHigh performance weather resistanceGood edge coverageAll powders are Qualicoat 1Leaves no residue or stainTwenty-five year guarantee.

Celebrating its 50th anniversary in 2019, the iconic Bell’s Sports Centre in Perth, one of Scotland’s largest sports facilities, needed a new roof to protect the important building. With the previous roof membrane nearing 30 years old and in a state of disrepair due to the challenging Scottish weather, the centre needed a long-term and robust roofing solution.Planned by Perth and Kinross Council’s arms-length body Live Active Leisure, the £700,000 project also aimed to improve insulation and ventilation in order to enhance the venue’s environmental performance and efficiency. With the building needing to stay fully operational during the works and the added difficulties presented by weather and the domed shape of the roof, the project provided a real challenge for the contractors.Roofing:Mechanically fixed Sika Sarnafil S327-15 EL light grey over Sika Sarnatherm insulation S327-15 EL.

Furnitubes designed and manufactured a number of AKRI retaining steel wall planters with ped and tray system for rooftop scheme in in Bexleyheath, south London. AKRI’s unique ped and tray system allows the planters to be left freestanding, sitting on a layer of waterproof membrane. Decking and pergolas were installed and benches were later retro-fitted to the planters to seamlessly integrate seating, manufactured in all steel to accommodate the required A fire rating, creating stunning landscaped roof tops across both buildings in the heart of a bustling city.

As described by the Woodland Trust, Glen Finglas is a great expanse of ancient woodland, lochs and open heathland, sitting at the heart of Loch Lomond and The Trossachs National Park and home to one of the best examples of upland wood pasture in Scotland.The newly constructed Gateway Building was designed to blend in with the surrounding woodlands and featured a circular timber-clad exterior with a spiralling, curved roof. The Woodland Trust approached RTA Building Limited, a Polyroof Approved Contractor, to provide a guaranteed waterproofing solution that would complement the aesthetics of the building.After comprehensive discussions and careful evaluation, we recommended the Polyroof 185 Warm Roof System for this unique project. This system stood out due to its exceptional BBA 30-year durability rating, impressive life-cycle costing performance, and an insurance-backed guarantee that offered the client peace of mind.The implementation process involved the meticulous installation of the Polyroof membrane, which flawlessly covered the flat roof areas while seamlessly following the curved perimeters and intricate spiral design. To ensure a fully waterproof edge detail that complemented the building’s contours, we installed a bespoke GRP capping. This robust combination provided Woodland Trust with a reliable and long-lasting roofing solution.Through our collaboration with Woodland Trust, we successfully implemented the Polyroof 185 Warm Roof System, delivering a durable, and cost-effective roofing solution. Our system’s exceptional durability rating, long-term life-cycle costing performance, and insurance-backed guarantee provided Woodland Trust with the confidence that they had chosen a roofing solution that would stand the test of time. With Polyroof, Woodland Trust achieved a seamless, reliable, and environmentally conscious roofing solution for their unique project.

Following the success of the Shoreline and Ocean hotels at Butlins’ Bognor Regis Resorts, the Butlins Wave Hotel is the newest addition, with the widest range of accommodation options. All three have been waterproofed by the Roofline Group. Cefil single-ply roofing membrane covers tapered insulation, with Fixfast tube washers and fasteners holding it all in place against the prevailing sea winds."We always get good service from you guys - that's the main reason we've stayed with you all these years"Bryan Lock - Project Manager at Roofline Group Ltd

The Royal Russell School in Croydon demonstrates the vast variety of waterproofing applications with which DANOPOL membranes can be specified. From standard flat roof areas to pitched standing seam roofs, vertical applications and accessible terraces, the flexibility of specification is really showcased on this project. The most noticeable feature is the stunning standing seam roofs, which are also DANOPOL HSF+ membrane, completed with ALPHA PROFILES. These ALPHA PROFILES are raised PVC profiles made from DANOPOL materials which can be retrospectively heat welded to the surface of the completed waterproofing system. The use of Alpha Profiles is rapidly increasing as the design may be highly customised and the installed centres can be changed to suit a clients particular aesthetic preferences and are often installed to obscure any standard membrane overlaps. An advantage of selecting DANOPOL membranes over a traditional metal standing seam roof option is that at less than 3.00kg per m2 for the waterproofing membrane, the system is incredibly lightweight and may be installed onto many lightweight structural substrates. The reduced load, when compared to traditional standing seam roof options, can also translate into savings on the underlying supporting structure. Our DANOPOL+ HSF membrane was also utilised on the terrace areas, which included vertical detailing to clad the internal faces of the parapet walls, providing a fully-encompassing watertight finish to the roof areas. Waterproofing System: DANOPOL+ HSF 1.5mm - Dark GreyConstruction Type: New Build Warm Roof Sector: EducationApprox. Size: 1,300m2Warranty Period: 20 Year

Pinewood Studio in Cardiff may be the location where Dr Who regularly saves the Universe but there was no intergalactic crisis when the building’s 16,000m2 roof needed to be refurbished recently. Instead, Sika Liquid Plastics’ Sikalastic® 625 cold applied liquid membrane provided the ideal solution to protect the building from Wales’ famously wet climate while enabling a low key project that didn’t disrupt filming on the many Hollywood movies and acclaimed TV shows filmed there, which have included James Bond, Harry Potter and Sherlock. https://www.youtube.com/watch?v=ayB4ekA7FfM&feature=youtu.be

Sika Liquid Plastics has specified and supplied a roof upgrade solution for West Suffolk Hospital to renew the waterproofing membrane on multiple areas of the hospital campus and create a gradual pitch to aid drainage while enhancing the building’s thermal performance. Delivered by specialist contractor, Allard Construction, the phase four programme included seven sections of the building in a 20 week programme. The seven areas that needed work were all under heavy coverage of mechanical plant and pipework, and consequently there were large areas of restricted access, these issues made Sika Liquid Plastics the perfect choice for the project

Alumasc Rooflights provided an ideal solution to allowing natural daylight into the building from above. The unique kerb design incorporates both security and waterproofing to create a reliable, safe and secure rooflight, allowing horizontal termination of the waterproof membrane. This makes water penetration virtually impossible. The domed glazing is moulded from Marlon FSX Longlife, premium quality solid polycarbonate, which has an impact resistance up to 200 times that of glass.Technically sophisticated, Harmer AV high-performance aluminium roof outlets are chosen for this project as they guarantee a trouble-free performance and are especially suited to flat roofing applications featuring continuous membranes.Harmer AV roof outlets combine innovative product design with full industry compliance to meet the needs of rainwater drainage in any construction project, with the ability to drain up to 40% more roof area than conventional gravity outlets. Further to this, their lightweight, durable, non-corrodible design means that they will do so for up to 40 years.GX Pressed Aluminium Gutters are robust box section gutters designed for traditional wet jointing on site. They’re especially suited to applications where maximum capacity gutters are required. For the very large drainage area of the campus roof, they were perfect.Designed to fully accommodate thermal movement at every joint, they are lightweight, durable and noncorrodible, and, upholding the environmental prerequisites of this project, they are 100% recyclable.Finally, Heritage Circular Pipes are available in 4 pipe diameters and 3 pipe lengths, together with a complete range of fittings. Can be factory finished to replicate cast iron or with BBA certificated powder coatings in a range of colours.

Brand New Oasis Academy, Silvertown Leads Education Facilities by a Mile with Garden Roof Spaces, and Rooftop Sports Pitch In the heart of what is now the Royal Docklands, a former industrial zone south of Royal Victoria Dock lies a brand new carefully considered Academy. Set to serve 600 students in this emerging community, the “superblock” thrusts modern educational facilities well into the 21st century. Despite the constrained site, the building design harmoniously incorporates vantage points from outdoor social spaces at varying levels.There’s no need to worry about a gravelly all weather pitch causing havoc at your hockey match. There’s a state-of-the-art full size Multi-Use Games Area, lush planted external roof spaces, a double height sports hall, and main hall/performance area making up the core of the building inside.CLIENT BRIEF AND DESIGNRenowned in their field, regeneration experts Morgan Sindall required a single sourced end-to-end roofing solution that could deliver a full system specification underpinned by a 35-year system warranty, installation expertise and site management.Understanding the Architect’s vision at award winning Rivington Street Studio to create a transformative educational haven and maximise the potential of the outdoor roof areas helped the Alumasc Roofing team bring this roof to life.PARTNERSHIPWorking with the project teams across Morgan Sindall, Rivington Street Studio and Fenland Flat Roofing pushing the boundaries and setting the standard for the future of the built environment in the Education sector.Tim Mott, Senior Design Manager, Morgan Sindall, “Brian and the Alumasc team have been on-site with additional safety constraints and delivered high-quality regular progress reporting to achieve the deadlines for the students to move in next year and really put these fantastic facilities to use.”Brian Cottington, New Build Regional Manager - South East & London, “The original specification included warm roof build ups which utilised tapered insulation, however this was subsequently adapted and working closely together with the Architect, Morgan Sindall and Fenland Flat Roofing we implemented a universal standard build up using an inverted system, with less complexity whilst achieving the high system performance and BRoof (t4).”Richard Trew, Associate, Rivington Street Studio, “The garden roof areas and outdoor space bring this building to life and against the industrial backdrop create a nurturing school environment. It was great working with the Alumasc team solving problems and overcoming design challenges along the way.”Chris Preston, Estimator, Fenland Flat Roofing, “Working closely with the local Alumasc Roofing Site Technicians and engaging in extensive discussions agreeing the final system requirements meant the installation process ran smoothly.”ENVIRONMENTALLY FOCUSSED SOLUTIONThe high performance Hydrotech inverted roof is a special formulation of refined asphalts and synthetic rubbers with 30% recycled content. Installing insulation with exceptional thermal properties including 300mm extruded polystyrene insulation and 56mm inverted upstand insulation effectively reduces heat loss.SAFETY PERFORMANCEThe application is a one-component, hot-applied, fully reinforced, flexible, self-healing hot melt monolithic membrane, applied in a liquid state to the substrate giving a 100% absolute and seamless bond.The Academy has a 35-year warranty for the works and has a fire classification of BRoof (t4) in accordance with BS EN 13501-5.ABOUTThe Oasis Academy is set to open its doors February 2022. Images courtesy of Rivington Street StudioCompletion: Autumn 2021Main Contractor: Morgan SindallAlumasc Registered Roofing Contractor: Fenland Flat RoofingArchitect: Rivington Street Studio

The project was to refurbish the roof and improve the drainage and insulation and bring it up to current building control standards. A thermographic survey of the roof was carried out by IKO, which confirmed that it was sound enough to have an overlay of IKO UXPL bituminous membrane rather than stripping it back and rebuilding. IKO UPXL was primarily chosen by the client for the 30 year guarantee. One section of the roof to be repaired was on top of dormers. Flame-free IKO UPXL membranes were used because of the potential fire risk of the abutting pitched tiled roof.

The Strathmore Centre is an important educational facility in Teddington, West London. Soprema supplied the roofing products for this new building, working closely with single-ply specialist Rock Roofing, main contractor LIFE Build Solutions and green roof partner SkyGarden to achieve a stunning result. Steve Hatcher, Contracts Manager at Rock Roofing, greatly appreciates the reassurance that, “once you’ve installed a Soprema product, you know you have delivered top quality.”SOPREMA FLAGON PVCThe roof build-up for the Strathmore Centre project consisted of a FLAGON PVC single ply membrane with a Wildflower Blanket System from SkyGarden on top. Steve points out that, especially in this kind of scenario, the reliability of the waterproofing is key: “Soprema’s single-ply is not only easy and quick to install, it is also highly reputable. When installing a product beneath a green roof, you need to have the confidence that that product will work. That’s the reason we choose to partner with Soprema.”CLOSE COLLABORATION ON THE DESIGNRock Roofing, LIFE Build, SkyGarden and Soprema collaborated closely on some last minute changes to the specification and the design.INSTALLATION TYPEOriginally, the team at Rock Roofing had proposed a mechanically fixed roof system. Yet on-site checks revealed that a loose-laid system would be a better match for the concrete beam construction of roof. Moreover, the latter installation method would be quicker.Steve and his team checked with Soprema to ensure that the proposed change would be covered by the guarantee, and with SkyGarden to ensure that the green roof met the minimum weight requirements. “Once we got confirmation from all the parties involved, we moved forward with the new installation type”, Steve explains. “We always get good technical back-up from Soprema, making for a very easy process, even when lastminute adaptations are required.”PARAPET CAPPINGMoreover, Rock Roofing came up with a value-engineered alternative for the capping on the parapets that were supposed to be done by a third party. Steve: “We gave the main contractor an alternative parapet detail, which would speed up installation and result in significant cost savings. We proposed a smaller capping and consulted with the team at Soprema to make sure the new perimeter detail was in agreement with them, which it was.” Thus, Rock Roofing saved LIFE Build considerable time and money.A BEAUTIFUL GREEN ROOFSteve looks back with satisfaction. “We had no complications or issues and even won back some of the lost time”, he recaps. LIFE Build is very pleased with the result as well. Steve: “We got some great feedback from them. Even though they think the green roof looks amazing, they pointed out that, in a way it’s a shame it covers such a nice roof. That’s a beautiful compliment.”QUESTIONS? GET IN TOUCH.Would you like to work with Soprema for your next project? Don’t hesitate to get in touch with our experts.

Raithwaite Hall is a 5 star, 45 bed boutique hotel set in 85 acres of wooded valleys within the North Yorkshire Moors National Park. The hotel offers terraced views of the landscape and across the Whitby coastline. A new extension was designed that is built against the hillside with stepped landscaped areas around the new building and an intensive green roof terrace to help blend the structure in with the surrounding gardens.The intensive green roof terrace is installed directly above a new function and dining room and required a specialised design to accommodate the additional loading and provide the necessary drainage for the turf lawn.     By utilising a multi-purpose geocomposite roof drainage board, the green roof system could be achieved to meet the project specific requirements. The ABG Deckdrain 2540S-NW20XUV product offers a lightweight option that delivers the equivalent drainage capacity of 300mm of drainage stone in a 25mm layer that weighs over a 100 times less per square metre. The lightweight drainage layer is supplied in rolls and is fast to install and move into position. The Deckdrain layer includes an integrated filter geotextile bonded to the top of the cuspated core. This prevents the growing media layer from intruding into the drainage void and filters the soil to prevent clogging. The Deckdrain is made from a high strength HDPE core that supports the 200mm deep layer of growing media required for the intensive green roof installation with deeper root systems. The underside of the product is impermeable and provides additional protection to the liquid waterproofing membrane. A green roof surface finish further helps to prolong the lifespan of the waterproofing layer and prevent UV degradation. The large grassed area on the podium also reduces surface water run-off and the grass is protected against waterlogging via the efficient drainage board layer. The shallow drainage build-up required also reduces the height of the steps onto the terrace and the associated cost of stone flags. The completed installation encompasses a 20mm Roofdrain drainage & reservoir board to support a secondary smaller sedum roof area, as well as Deckdrain layers installed for structural drainage to the surfaces around the patio slab and retaining wall areas.ABG provided a full green roof project design, installation and maintenance service for the project.

The new flagship outlet of Pioneer Foodstore in Carlisle was built to a high specification with the aim of significantly extending their client base. The planning application had to meet the requirement for a screen to conceal the roof-top services and air-conditioning plant.Italia-80V was proposed, which could be bent to a radius, to fulfill the vision for a semi-circular end to one side of the compound. The 2950mm high steel louvre panels were welded onto appropriately shaped RSA support rails at top and bottom, which were supplied with multiple holes for fixing to the posts to ensure perfect continuity of spacing. A double-leaf gate was also seamlessly incorporated by using a front fixing design.Lang+Fulton worked closely with the architect at an early stage to advise on the fixing points for the posts which would carry the screen. This ensured that the thermal barrier and waterproof membrane could be wrapped up the footings for a neat and effective installation.

The Pride development is a £60 million investment which includes a new 122 bed hospital being built on the former Ryhope Hospital site in Sunderland. Laing O’Rourke, the main contractors of this project, specified Polyroof waterproofing systems for the flat roof areas.Barclay Roofing Ltd carried out the works, having previously worked with Laing O’Rourke on the 2013 Roofing Award Winning Durham Gateway Project.The SolutionThe roofs were of a complex nature and involved many details such as vents, level changes, handrail abutments, plant supports, protrusions, stanchion blocks, and parapet walls. It was essential that these details could be waterproofed in the most effective and rapid way possible. Protec, being liquid-applied, was dressed onto the upstands of the details without the need for lengthy and complicated ‘patching’ work, creating a totally seamless interface between the details and the flat roof membrane.The client required designated, permanent walkways for maintenance purposes. Quartz Sand & Polyfinish was used to create a durable and hard-wearing anti-slip finish, without the need for costly ancillary walkway systems. The system is capable of withstanding heavy foot traffic and is impact resistant meaning the client had peace of mind that the walkways can be used without the risk of damaging the waterproofing integrity. Some of the roof areas are to be covered with a green roof system. The waterproofing membrane that was used therefore had to be highly durable, lightweight, fully root resistant and maintenance-free. The Protec System meets all the criteria for use with green roofs and was specified as the ideal solution for the green roof areas.It was essential that health & safety and hazard risks were kept to an absolute minimum during works. Being cold applied and low in VOC content, Protec was able to satisfy the stringent requirements of this aspect of the project.Due to the size of the roof areas, structural expansion and contraction movements had to be considered. Ideally the client wanted a waterproofing system that could accommodate these movements without the need for any additional and potentially costly modifications such as expansion joints. Protec is specially formulated to be highly flexible whilst also maintain its durability and hard-wearing properties.

At Polyroof, we take pride in providing innovative liquid roofing solutions that meet the unique needs of our clients. From project conception to completion, our expertise lies in creating high-performance roofing systems that offer both durability and aesthetic appeal.This case study highlights our collaboration with Woodholm, a picturesque property located in Southerness, constrained by the Dumfries & Galloway Council Planning’s “room in the roof” design.The SolutionWoodholm’s owners were determined to create a home that would evolve organically while adhering to the council’s planning regulations. To achieve their vision, they enlisted the services of David Lamb Architectural Services to submit a Planning Application on their behalf, seeking approval for a modification from an existing apex roof design to a curved roof. After going through the rigorous process, the application successfully obtained full Planning Committee approval on 14 February 2017.To realise their desired construction, Woodholm’s owners had a preference for using wood and oak, aiming to incorporate these elements into the design. To accomplish this, they collaborated with Carpenter Oak Woodland, a renowned timber construction company known for their expertise in oak framed structures. The company skillfully designed an oak framed structure that perfectly met the owners’ requirements. By mid-November 2017, Woodholm had a stunning and aesthetically pleasing frame in place.However, finding an ideal roofing solution proved to be a challenging task for Woodholm. Initially considering a zinc roof, they encountered obstacles due to the prohibitive costs and the challenges posed by their maritime environment, as Woodholm is located directly on the shores of the Solway Firth. It was at this point that David Lamb’s initial positive impression of a roofing product caught their attention. Woodholm’s owners approached Polyroof’s simulated metal finishes with their needs and were introduced to the Polyroof technical team. The team guided them through the necessary technical specifications to meet the Scottish Building Warrant for a Warm Roof, ensuring compliance with the required standards.Fortuitously, Woodholm’s owners discovered that Polyroof would be exhibiting at the “Homebuilding & Renovating Show” from 21-22 October 2017. At the event, they had the opportunity to meet the Polyroof team as well as Contractor, Kenny Scott of LK Roofing, Lochmaben. The Woodholm team was highly impressed and reassured by the collective experience, knowledge, and technical expertise demonstrated by Polyroof and LK Roofing. Equally important, they appreciated their ability to attentively listen to and understand their concerns.Following the show, a site meeting was promptly arranged with LK Roofing, allowing all parties to discuss the project in detail. As a result, a comprehensive and competitive quotation was provided, falling comfortably within Woodholm’s budgetary requirements.By early December 2017, Woodholm’s joiner had installed the sub-decking, which served as the foundation for the roofing system. LK Roofing then expertly applied the Alutrix membrane, a high-quality waterproofing layer, providing Woodholm with a watertight working cover.Thanks to our collaborative efforts with Woodholm, the project achieved a seamless integration of their desired curved roof design, wood and oak elements, and our advanced liquid roofing system. Woodholm’s owners were delighted with the final result—a beautiful, organically evolving home that not only met their needs but also exceeded their expectations.At Polyroof, we are dedicated to providing roofing solutions that offer both outstanding performance and stunning aesthetics. The Woodholm case study is a testament to our commitment to delivering innovative products and excellent customer service, tailored to meet the unique requirements of each project.

HMS Caroline – Museum ship... CHALLENGE HMS Caroline, the last surviving vessel from the 1916 Battle of Jutland, now rests in the Titanic Quarter in Belfast. After a second life as floating Headquarters of the Royal Navy during World War II, this living legend will continue to serve the country as a museum ship. For this purpose, however, extensive restoration appeared to be essential. The key requirement on HMS Caroline was to avoid penetration of the deck surface. To safeguard its historic heritage against damage, the Royal Navy sought a reliable waterproofing solution. SOLUTION Versatile and impenetrable! What used to be the properties of this battle cruiser, happen to apply to the RENOLIT synthetic single ply roofing membranes as well. That’s why RENOLIT ALKORPLAN was heralded as the optimal solution for the refurbishment of the ship’s gun deck. The lead grey RENOLIT ALKORPLAN A provided an ideal modern day solution with an impressive finish. On top of a new layer of insulation board, the calendered and laminated fleece-backed PVC membrane was fully bonded with a combination of the RENOLIT ALKORPLUS81068 polyurethane adhesive and the universal RENOLIT DUALFIX81065 glue. RENOLIT ALKORPLAN stands out above the competition given its excellent weldability, simplicity of detailing and overall versatility. Once installed, ongoing maintenance of the membrane will be minimal with a predicted life expectancy in excess of 35 years (BBA approved). On 31st of May 2016 the freshly refurbished HMS Caroline stole the show as a fitting backdrop for a commemoration honouring its centenary. 

Cygnet Hospital, a new state of the art medical campus based in Maidstone required a waterproofing membrane for the newly installed concrete and metal decks. Proteus Waterproofing applied their Cold Melt® membrane, to provide a seamless leak protection to the inverted roof, that was then finished with Proteus Waterproofing’s Pro-Living® Green Roof. High Performance WaterproofingFirstly, the metal deck for the main roof was prepared and overlaid with Pro-Vapour Control SA, a self-adhesive bituminous waterproofing membrane that forms a barrier against vapour and gases, ready for the Proteus Pro-Therm PIR Insulation and Cold Melt® waterproofing installations.Proteus Pro-Therm PIR is stable, rot proof and will remain effective as an insulation system for the lifetime of the waterproofing covering, making it suitable for new builds. Cold Melt® waterproofing was then overlaid to the main roof and upstands. The exposed areas were covered with Cold Melt® UV Top Coat, making the waterproofing UV stable. Cold Melt® provides a seamless leak protection and is cold applied, therefore removing the risk of fire. The roof was completed with a Pro-Living® Green Roof providing ecological benefits for the building. Health and SafetyWhen working on occupied buildings, safety is of utmost importance. Proteus Waterproofing’s Cold Melt® system is cold applied and low odour, therefore meeting all necessary health and safety requirements. Cold Melt® is quick, simple and safe to apply allowing the Proteus Approved Contractor to successfully complete the project to a high standard within a short time frame, whilst ensuring the planned building works continued to run on schedule.Long Term PerformanceIncorporating recycled rubber crumb and organically grown products, Cold Melt® creates an elastomeric, seamless, cold applied waterproofing membrane. Cold Melt® system can include inverted roof insulation and, with or without insulation, can be designed as a paved, ballasted, green or brown roof. The membrane is made in the UK, does not become brittle with age and is BBA Certified to last the life of the structure.

So here we have a stunning steel framed barn conversion stripped down and retrofit with a huge hybrid timber frame panel system manufactured and installed by White Haus Bespoke Timber Frame. These panels are made up of 140mm insulated timber frame, 9mm OSB sheathing with Passive Purple External and two 50mm cross battens externally, followed by feathered edge cladding. With the internal side then adding an additional 50mm PIR insulation flowing into the joist zones with one continuous layer of Passive Purple and 25mm counter battens for services. This 326mm wall build up has used both Passive Purple and Passive Purple External which meet in the window formers to guarantee the build its internal airtight vapour control and external weatherproof breather membrane. The Joints in the OSB, PIR insulation and fixings into the timber frame studwork were all prepped like always using the BRUSH versions of both Passive Purple and Passive Purple External. This fibre reinforced product allows for a tough hold and elongation on any shrinkage the insulation or timber may have with building settlement or extreme changes in climate. With only a score of 2.5ach required, Intelligent Membranes have given this wonderfully unique home the full treatment for perfect performance to keep the HVAC system running on low hassle percentage and optimal performance output.

Sika's full suit of products helped with waterproofing the scalloped roof at the campus. A combination of Sike Sarnafils waterproof Single Ply membrane, as a flexible and robust membrane, and Sikalastic- 621, as a highly-durable elastic liquid polyurethane system, was used. As well as the roof refurbishment, concrete repairs were also carried out with the use of Sika MonoTop-615 and Sikagard - 550. For the steel reinforcement Sika FerroGard-903 was also used. The refurbishment of the buliding was a great project for Sika to work on as it had solutions for each aspect of the project.

Gary Lambert of Broadstairs-based Complete Roofing chose Rhepanol fk single ply membrane to waterproof the 690 m2 two-tier curved roof of celebrity restaurant Rock Salt, which overlooks Folkestone harbour.

Five domed design... CHALLENGE The idea of the architect was to design a building with 5 parabolic roof surfaces or domes. The unique five domed design comprises of pods finished in a range of different materials, each contributing to the development’s remit to blend into the park landscape. The biggest issue for the architect was how to connect these different materials to become a complete watertight building. SOLUTION Each dome is waterproofed using a RENOLIT ALKORPLAN system and whilst the complex is thought to be the UK’s largest timber-built geodesic project, it also demonstrates possibly the most innovative use of single ply membrane ever seen in the UK. By using the RENOLIT ALKORPLAN membrane as the main layer to waterproof the five domes an easy joint could be made by means of hot air. On one dome our RENOLIT ALKORPLAN A membrane was used in combination with PVC profiles providing geometric aesthetic detailing. On another dome a RENOLIT ALKORPLAN L membrane was used under a green roof system. On the other domes the RENOLIT ALKORPLAN F membrane was used in combination with our RENOLIT ALKORSOLAR fixing system supporting respectively glazed aluminium sheeting and cedar shingle tiles.

Radmat Building Products has supplied the waterproofing roofing system for the Crossrail Place shopping development and roof garden in Canary Wharf. The system provides high performance waterproofing and thermal insulation – guaranteed for the lifetime of the structure – and has enabled the construction of an extensively planted living roof.• The 310m long roof arches 30m over the park and opens to allow natural irrigation• Highly insulating roofing materials help create a microclimate for the gardensRadmat Approved Contractor Prater delivered a 9,300m² roofing solution using PermaQuik PQ6100 Hot Melt Monolithic Waterproofing Membrane, EshaFlex 370 WS Root Barrier and ProTherm insulation.Construction access to the complex inverted timber roof was challenging, so Radmat’s products were chosen for their quick and flexible application and fast-sealing properties.PermaQuik is widely used beneath green roof installations where long-term weather tightness is a necessity, and it was chosen to support the extensive and densely planted gardens, which are the main feature of the Crossrail Place roof terrace.The PermaQuik membrane was followed by EshaFlex 370 WS Root Barrier, a reinforced bitumen membrane that is torch applied to the base sheet. It was selected because of its thermal efficiency and suitability for use with living roof systems. Partnered with ProTherm’s excellent insulation, the complex timber roof now boasts a waterproof system that is BBA Certified to last the lifetime of the building.The wooden structure evokes the ships that once sailed into West India Dock and provides a warm, natural counterpoint to the steel and glass towers of Canary Wharf.And with Radmat’s high performance products and lifetime guarantee, the green roof terrace at Crossrail Place will be a living oasis in the heart of London’s financial district for years to come.