"roofing"

Tapered roof insulation offers drainage and fabric performance on roof of Grade ‘A’ Office development

Arable farmer Ivan Banister talked to various agricultural building companies for advice before using local contractors to construct both parts of the new grain store. The first part of the new building was constructed with the secondary expansion undertaken and completed in time for the harvest. Eternit Profile 6 roofing sheets were selected for the project and installed by MJ Barrett.The roof was the most important consideration for Ivan and it was vital that the roofing material used on the store would resist the pressure from temperature and weather without cracking. Any problems in the roof and subsequent leakage would cause serious damage to harvested crops.Condensation had also proved a problem in older, steel roofed storage facilities at Warden Farms and the vapour permeable nature of Eternit fibre cement roofing sheets helps to minimise moisture levels within the new storage building.

Castlemead is a social housing block in the London Borough of Southwark, located in the busy Camberwell Road area. The vacant building was undergoing an internal refurbishment project, delivered by fit out specialist, Paragon, and as part of these works the main contractor brought in roofing specialist, Hambro Roofing, to carry out some repairs to the existing felt roof. It quickly became apparent that the existing roof surface had reached the end of its service life and actually required a full refurbishment.

Kier Group is a leading property, residential, construction and services group, which invests in, builds, maintains and renews buildings operating across many sectors, including housing, defence, education, power, transport and utilities.Kier handled both the design and delivery process and worked directly with Cottenham-based roofing contractor, Voland Roofing, on this project.Kier wanted the roof to not only insulate against airborne sound, but also to reduce noise from the impact of raindrops on the roof.

The new £8.5m Allam Diabetes Centre at Hull Royal Infirmary plans to treat and care for patients with diabetes and metabolic bone diseases.It also includes a significant amount of clinical research facilities supporting not only diabetes and endocrinology, but also vascular surgery, neurology and other research departments. Its curved towers flank a glass entrance, which leads to a large waiting area and reception. Spread over three storeys are consulting rooms, specialist treatment rooms, office space and changing rooms as well as a roof terrace on the second floor. Designed to achieve a BREEAM rating of ‘very good’, the thermal performance of the insulation specified for the Allam Diabetes Centre’s flat roof was hugely important. Another crucial factor was fire safety. Although the application doesn’t fall under current fire regulations banning combustible insulation, the architect specified that only non-combustible materials should be used during construction.  Main contractors Zenith Developments appointed specialist contractors Fosters Roofing to install the roof. They in turn tasked DANOSA UK with supplying all the materials for the roof construction, including the insulation. “The build-up of the Allam Diabetes Centre was a single-ply warm roof with a tapered insulation scheme to provide the fall required for rainwater run-off,” explained Steve Downey, Commercial Director at DANOSA UK. “Tapered insulation schemes are always more difficult than traditional flat roofs, so we asked Knauf Insulation for technical advice on how to achieve the required U-value of 0.18 W/m2K.” The Knauf Insulation Technical Support Team recommended Rocksilk® Flat Roof Slab. It is BBA certified for use on mechanically fixed flat roof build-ups and is suitable for all types of roof deck.  As well as excellent thermal performance, Rocksilk® Flat Roof Slab is non-combustible with the best possible Euroclass A1 reaction to fire classification. It also provides excellent sound absorption so will help reduce the drumming effect of rainfall.  Rocksilk® Flat Roof Slab contains a special water repellent additive and is manufactured using Knauf Insulation's Krimpact® Technology which provides high levels of compressive strength and durability. As the project was a tapered insulation scheme, Rocksilk® Flat Roof Slab was manufactured to order to ensure the correct fall was created. The tapered insulation scheme wasn’t the only challenge with the Allam Diabetes Centre – it also features a curved façade, which added complexity for the installation team at Fosters Roofing.  Paul Foster, Managing Director at Fosters Roofing said: “Insulation needs to be carefully cut to the exact shape of the building otherwise heat can escape making it less energy efficient. Thankfully Rocksilk® Flat Roof Slab was easy to cut and quick to install, so it wasn’t a problem.” Rocksilk® Flat Roof Slab has also been designed to knit together during installation so there are no gaps that could affect thermal, fire or acoustic performance. By using Rocksilk® Flat Roof Slab, Fosters Roofing and DANOSA UK were able to achieve the required specification for the tapered insulation scheme on the new Allam Diabetes Centre. This will contribute to the energy efficiency needed to achieve the BREEAM ‘very good’ rating. 

FOAMGLAS® READY BOARD T4+Design Architects: Kohn, Pedersen, Fox Associates – KPF London, Marcus BlanesMain contractor: SkansaConstruction: 2011Application: Compact Roof - FOAMGLAS® Ready Board T4+Finish: Umicore VM ZincThe roof level 41 of the Heron Tower (with a height of 120m) is designed to the most exacting standards for sustainability and efficiency.The building received the BREEAM rating of 'Excellent', with FOAMGLAS® thermal insulation being part of a green and energy efficient building. The roof is composed with FOAMGLAS® READY BOARD insulation and Umicore VM Zinc roofing as a durable finish.FOAMGLAS® insulation has the ability to withstand high structural loads and has developed a special fixing system for metal roofing.Square metal fixing plates are inserted into the upper surface of the insulation and covered with a waterproofing and a separation sheet.This is the perfect system to fully support metal standing seam roofing which is screwed to the metal plates without thermal bridging between the metal roof sheet and the building structure.

With its team of experts in the polycarbonate and roof glazing fields, Twinfix works on developing the best, newest and most cost-effective roof glazing products. A family business, Twinfix has been involved in the polycarbonate roof glazing market for nearly 30 years. This year, Twinfix worked with Principal Contractor AmcoGiffen restoring Pembroke Dock Station. Twinfix supplied its non-fragile roofing system the Multi-Link-Panel to replace the old tired, discoloured glazing at Pembroke Dock Station.

Manchester Arena, managed and operated by SMG Europe, is one of the busiest venues in the world, and the largest indoor arena in Europe. A leaky roof, specifically in the area where the existing roof of the arena joined the railway station, was causing real concern and disruption. Following the roof survey, the Technical Team created a bespoke specification, including project specific detail drawings, tapered insulation plans and roof layouts, U-Value Calculations, Wind Uplift Calculations and Condensation Risk Analysis.

A £40 million investment, 13 roof areas, eight different roof levels, and a steady stream of visiting students to keep happy throughout – the University of Reading (UoR) Library’s complete refurbishment was a large and challenging project spanning three years.Originally opened in 1964 and later extended in 1985, the library’s internal and external revamp was designed to increase space, improve facilities for individual study, provide better access and security across the building, and improve energy efficiency.In addition to a new-build Café extension, a new entrance canopy, a new ground-to-roof level lift and stair core extension – each featuring a new flat roof area – there were also 10 existing flat roof areas refurbished, coupled with the replacement of windows and re-cladding of the building’s exterior.Following a competitive tender based on an outline specification, Owlsworth Roofing, Sika Sarnafil single ply flat roofing specialists, impressed with the level of detail included in their quote and were awarded the contract by main contractor ISG.Roofing:Sika® Sarnafil G410-12 ELF.Sika® Sarnafi G410-12 EL.Sarnavap®-5000E SA.Sarnavap® HD SA.Primer 600.Sikatherm® PIR Insulation and Sarnacol®-2162.

The purpose:Taylor Wimpey’s Eclipse development was the final phase of the large-scale modernisation and renewal strategy for the London Borough of Walthamstow Forest, known as The Blackhorse Lane Action Plan. Eclipse would offer affordable social and private housing via 500 homes in two six-storey apartment blocks.To help satisfy one of the Plan’s objectives- “to ensure new developments incorporate the highest levels of sustainable design and their impact on climate change is minimised”- we installed green roofs on both blocks. As it was the final development phase, space was limited; time was also an influencing factor in facilitating the tight build programme,avoiding delays, and enabling the client to deliver much-needed new homes.Our solutionTo enable fulfilment of the brief, we recommended our HM-40 Paratech Hot Melt Roofing System as the inverted waterproofing base for the green roof. A fully-bonded system, HM-40 is a robust, durable, and highly flexible monolithic, self-healing hot-melt waterproofing system for protected roofs, green roofs, terraces, and podium decks with a 40-year durability statement. In addition, it is firerated for unrestricted use when covered with a green or ballast roof.Unlike other hot melt systems that use fleeces, the Paratech system incorporates a reinforcement mesh: this allows the system to be rolled out, making waterproofing installation faster, thereby enabling the contractor to lay the top roofing layer of artificial grass and landscaped green roofs. Unfortunately, an on-site compound to store the roofing components was unavailable. We worked closely with T&T Roofing and Taylor Wimpey to ensure deliveries arrived in build sequence for immediate use, but without adversely impacting residents who had already moved into their newhomes.“The features of the flat roof system provided a seamless, issue-free roof installation, with rapid installation time causing minimal disruption. Langley’s technical team was always on hand to provide assistance when necessary, working collaboratively to guarantee a consistent and highquality installation.”

Clapham ParkBauder Total Green Roof System (BTGRS) with BauderSOLAR G LIGHTSynopsisThe regeneration at Clapham Park involved the demolition of old housing stock to make way for new affordable homes. The 5-storey building with 21 dwellings incorporating the latest rooftop technology which blends a biodiverse green roof and unified solar PV array. This approach met the planning requirements and maximised the limited roof space to generate energy for the residents. The development was certified BREEAM ‘Outstanding’ due to its environmental, economic and social sustainability attributes.Bauder Building BoardProject:Clapham ParkLocation:Clapham Park, Lambeth, LondonRoof Area:500m² green roof layered with 116m² of PVSpecifier:PJMA Architects​Approved Contractor:EJ Roberts Ltd​PV Installer:M & M Electrical LtdThe specification The BauderSOLAR G LIGHT system has National House Building Control (NHBC) approval and meets local authority building control (LABC) requirements. The system was installed on zero falls roof deck, making it a very cost-effective solution.The biodiverse green roof which includes 35 plant species recognised by the RHS as Perfect for Pollinators, covers the totality of the roof area and offers a large variety of vegetation. The building reduces its carbon impact with the highly efficient PIR insulation and generates approximatively 10% of the flats usage with a maximum possible output of 75kWp from the 70 PV modules. The solar PV mounting units are ballasted by the substrate and vegetation, removing the need for any penetrating products in the waterproofing.Products appliedBauder Total Green Roof SystemThis system features a reinforced bituminous waterproofing system offering a service life expectancy in excess of 40 years.BauderSOLAR G LIGHTThe integration of a green roof and photovoltaics into one system drawing the maximum potential from a flat roof.BauderGREEN Flora Seed MixesA blend of 49 British native species seed, to maximise diversity of vegetation on green roofs.Project challengesOne of the major challenges of the project was the roof area, which at only 500m² needed to include a green roof and a renewable energy system to meet the main objectives of sustainability and energy efficiency of the development highlighted by the planning committee. The roof contributed towards requirements under National Planning Policy Framework (NPPF) Chapter 11: Conserving and enhancing the natural environment and The London Plan 2011 Policy 5.2 – Minimising Carbon Dioxide Emissions, Policy 5.3 – Sustainable Design and Construction and Policy 5.7 – Renewable Energy. The green roof is layered with a raised PV array so that the entire roof qualifies as a green roof whilst also providing energy generation.System installedBauder Total Green Roof System (BTGRS)1 BauderPLANT EA torch-applied, root resistant 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 KSA DUOA self-adhesive bitumen underlayer with “DUO” lap technology to ensure thorough sealing of lap joints, even in lower temperatures. 3 BauderPIR FA-TEFlatboard insulation used on the lantern roof area to help meet its U-value of 0.15W/m²K. 4 BauderTEC KSD FBSA self-adhesive SBS elastomeric bitumen air & vapour control layer, with a mica finished upper surface to allow easy bonding of insulation using the specified Bauder insulation adhesive.

When Guildford Crematorium was targeted by thieves in 2011 and completely stripped of its long strip standing seam roof, the City Council considered the options for a facility that didn't have 24-hour security. Instead they opted for Rhepanol fk roofing membrane finished with its copper roof paint.

George Abbott SchoolBauder Thermofol single ply waterproofing system with Bauder Euroglaze rooflightsSynopsisLocated in Guildford, George Abbot School is a secondary education school which provides education for 2000 people aged 11 to 18. The school had a history of leaks in the DT rooms above which a profiled sheet metal roof was installed.Following many attempted repairs, Bauder was commissioned to carry out a roof survey on the 228m² profiled sheet metal roof. The report identified issues with not only the gutter area, which was originally believed to be the problematic area, but also with the adjoining profiled roof and also with the large rooflight unit.Bauder Building BoardProject: George Abbott SchoolLocation: Guildford, SurreyRoof Area: 228m²Specifier: Baily GarnerApproved Contractor: Inspire Contract ServicesThe specification Bauder submitted a proposal to refurbish all areas of the failing roof:The gutter area needing standing water to be removed for which Bauder tapered insulation was proposed to create effective drainage falls.The adjoining profiled sheet metal roof requiring a new waterproofing system. The Bauder Profiled Roof Overlay system was determined to be the best solution, using bespoke profiled insulation boards specifically designed to fit the shape of the roof. The Thermofol U15 Fleece Back membrane was then specified as the waterproofing layer providing a robust yet lightweight waterproofing system to the roof.The existing rooflight unit, being one of the problematic areas of the rooftop, was also replaced with Bauder Euroglaze rooflights. Products appliedInsulation infill systemIntended for refurbishing profiled sheet metal roofs or increasing the thermal performance of existing insulated cladding systems.Bauder Euroglaze rooflightsModular rooflight designed to provide high standards of illumination, insulation and ventilation to the interior of flat roofed buildings. These are made to order and the size can therefore be tailor made to fit any roof aperture. The resultBauder approved contractor, Inspire Contracts, installed the roof system and rooflights. Bauder’s expert site technicians carried out over 10 site visits during the 4 months of works on the site. Following a final site visit and a leak test Bauder was able to issue a 20 year product and workmanship guarantee to the client.The choice to use Bauder, a single source of manufacturing for the roof systems and the rooflight, proved beneficial as it enabled Bauder’s flat roof technician team to design out a number of the detailing issues responsible for the historic leak problems and it also eased the installation process for the client and the approved contractor, as Bauder provided its integral service from the roof survey to the final site visit and the issue of the guarantee.System installed Bauder Thermofol PVC single ply waterproofing system 1 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 DeckProfiled sheet metal

The Brief Our client, architect Scott Brownrigg, wanted glazed roof lights for properties within The Glasshouse, an exclusive new housing development in Putney, London to provide natural daylight and allow residents safe and easy access onto their roof terraces. The solution Surespan worked closely with Scott Brownrigg to design the roof lights to ensure they were in keeping with the style of the contemporary building. They were set to automatically open with the touch of a button so residents could easily and safely step out onto their roof terrace.

Part of the Co-op Academies Trust since 2018, Portland School in Birkenhead is a primary school for children aged 3-11. Attended by Everton and England footballing legend of the 1920s and 30s, Dixie Dean, the main school building has had many additions over time, resulting in a roof with 24 roof areas at varying levels and with various roof build-ups. The whole of this 1600 m² roof was in need of refurbishment as part of a programme of maintenance and upgrades following the school’s transition to academy status.

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 Ascent Aluminium Roof Access Walkway was specified to meet the clients requirement to create a level anti-slip route across the roof for maintenance personnel. The Ascent Aluminium walkway is tested for use on the aluminium standing seam roof and is secured back to the roof sheet using a proprietary support clamp. The Ascent aluminium walkway is designed in accordance with BS EN 516:2006 Prefabricated accessories for roofing, BS 4592, Industrial Type Flooring and stair treads, BS EN ISO 14122-3 Stairs, stepladders and Guardaril, BS 7976-2:2002+A1:2013 Pendulum slip resistance. And is manufactured under ISO 9001 and CE 1090 factory production control procedures, creating a walkway that is CE / UKCA compliant.

The Ascent Aluminium Roof Access Walkway was specified to meet the clients requirement to create a level anti-slip route across the roof for maintenance personnel. The Ascent Aluminium walkway is tested for use on the metal profiled roof sheet and is secured back to the roof sheet using a proprietary fixing. The Ascent aluminium walkway is designed in accordance with BS EN 516:2006 Prefabricated accessories for roofing, BS 4592, Industrial Type Flooring and stair treads, BS EN ISO 14122-3 Stairs, stepladders and Guardrail, BS 7976-2:2002+A1:2013 Pendulum slip resistance. And is manufactured under ISO 9001 and CE 1090 factory production control procedures, creating a walkway that is CE / UKCA compliant.

Boughton supplied IN1 Green Roof Substrate for the development of luxury roof gardens in Lillie Square, South East London.

Also the largest public cultural space in Europe, the new 35,000m² Library of Birmingham replaces the old Central Library and is seen by Birmingham City Council as a flagship project for the redevelopment of the city.Designed by architects Mecanoo, working with multi-discipline engineers Buro Happold and main contractor Carillion, the multi-tiered roof of the library features two garden terraces which have both contributed to the BREEAM Excellent rating.Radmat Approved Contractor Prater delivered a roofing solution that is BBA Certified to last ‘the life of the building’. Consisting of Radmat PermaQuik PQ6100 Hot Melt Monolithic waterproofing membrane, root resistant Cap Sheet and ProTherm inverted roof insulation, the entire roof was electronically tested for integrity prior to the installation of aluminum powder coated cappings to the perimeter roof upstands.Once the installation of the 7,500m. of PermaQuik PQ6100 roofing system on the roof and ground level podium deck was signed off by a Radmat Technical Adviser, Prater brought in specialist green roof contractor Frost Landscapes. They then carried out the installation of the complex intensive green roofs, at levels 3 and 7, which were created to attract local wildlife and to offer visitors a pleasant environment to enjoy all year round.Combining durability and flexibility with independent verification of life expectancy and a market leading guarantee the PermaQuik PQ6100 Hot Melt Monolithic waterproofing system is set to deliver exceptional performance befitting of the uniquely designed structure which has set a remarkably high standard for library design.With Radmat’s high performance roofing solution providing weathertight protection for years to come, the Library of Birmingham looks set to not only form the catalyst for further regeneration within the city but also how future libraries are designed and perceived by the user.

The Fixfast living roof retention system has been used as part of a stunning Sky Garden green roof installation in Hertfordshire, which featured on Grand Designs. 175m of 100mm EdgeGuard aluminium retention angles surround the perimeter of the living roof, preserving its unique appearance, and maintaining the integrity of the gravel fire breaks.

Welsh Slate has supplied roofing slates from both its Penrhyn and Ffestiniog quarries to provide a like-for-like replacement for an old 19th century roof at London’s famous St Martin-in-the-Fields church complex through roofing contractors NDM Leadsheet Specialists Ltd working for main contractor Costain Ltd.

In a complex new build roofing project that was deemed almost impossible, Contour Roofing stepped up to the challenge with a Sika Sarnafil membrane. With truly stunning results, the project impressed the judges of the prestigious NFRC UK Roofing Awards, winning the Single Ply category. In partnership with Sika Sarnafil, Contour quickly presented a new bespoke specification; an adhered system using Sarnafil G410-15ELF Lead Grey with a polyester fleece backing as the main roof sheet for a flawless result and Sarnafil G410-15EL Lead Grey for all the detail work flashings.

Expanding Exeter College's 700-year-old campus in the heart of Oxford was a privilege given to Alison Brooks Architects: developing Cohen Quad, a hub for students including living accommodation for 90, an auditorium, seminar rooms, social learning spaces, an archive, a café, roof terraces, offices, and fellows' accommodation.Student rooms and fellows' studies are enclosed by patterned stainless steel that folds across wall and roof surfaces, sitting on a stone-clad 'base' that houses the quads' public spaces.The Rimex tiling in the checkerboard pattern really highlights the stunning dormer windows and the beautiful curve of the tiles from the roofline wrap around the roof and down the walls creating a seamless cloak around the building. 17,000 iridescent stainless steel shingles adorn this roof, and the tiles are of a wonderful muted bronze and champagne colour with an unusual texture - catching - but not reflecting the sunlight. "We were given excellent technical and sales support from Fixfast. All stainless steel fixings and shingle clips were supplied in a timely and efficient manner. These factors contributed to Roles Broderick Roofing Ltd winning the NFRC Roofing Award for 2017"Ben Clark - Operations Director at Roles Broderick Roofing Ltd

Broughton & Yeamans House are high rise apartment blocks in Bristol, Avon, under the management of Bristol City Council. The roof areas, totalling over 3,500m2, had originally been waterproofed with asphalt and then later treated with a coating repair.Unfortunately, water ingress continued to be a problem with leaking occurring at numerous locations. Not wanting to cause further disruption to the residents and to avoid costly damage to the interior of the buildings, the council contacted Polyroof and a survey of the roof was arranged.The survey by Polyroof’s Technical Services highlighted the extent of the issues within the roof, including identifying water ingress through the many vertical sections present on the roofs, including parapet walls and the lift house building. After performing core tests on the roof, it was shown that the existing roof build, which contained insulation as part of a warm roof design, was in a suitable condition to be retained and overlaid – avoiding costly disruption for the client and residents.A bespoke specification was drawn up by the Polyroof Technical Team that provided a comprehensive set of recommendations to ensure the apartment blocks were fully protected from the elements.To make sure the roof could be left in a totally weatherproof condition, it was necessary to treat not only the flat roof sections but the vertical areas too. The client was keen to improve the thermal performance of the buildings by adding additional insulation, but it was imperative that disruption was kept to a minimum – not only would stripping works impact on the buildings’ residents, but hauling waste materials from such a great height would be costly and logistically challenging.With BBA approval, top-rated fire performance and Polyroof’s trusted 20 Year Accredited System Guarantee, the client has total peace of mind that the apartment block could not be better protected for decades to come.

RENOLIT ALKORPLAN scores high on Deltion College! CHALLENGE A sports field on top of the roof. A surprising and exceptional RENOLIT achievement that absolutely draws the attention… Deltion College in Zwolle (NL) really is an exceptional case. This college offers amongst others education courses to prepare for service in the Armed Forces - Navy, Army as well as the Air Forces. No doubt sports are an important part of life on the campus. Then came the inspiration to install an artificial grass sports field on top of the roof of the newly constructed multifunctional building. Space-saving and functional! The choice to specify RENOLIT ALKORPLAN as roofing material was a shrewd decision, as RENOLIT ALKORPLAN offers a solution not only for mechanically fixed roofs but also for ballasted roof systems… SOLUTION The highest rooftop, a steel frame construction, has been installed with a PES-reinforced mechanically fixed RENOLIT ALKORPLAN F roofing membrane. For the lower concrete roof – the sports field to be – a different product was required: RENOLIT ALKORPLAN L! A glass fleece reinforced membrane with an excellent resistance to microorganisms, specifically conceived for ballasted roofs. Before installing the insulation, a bituminous vapour barrier was placed on top of the concrete. Next came a first layer of 70 mm thick aluminium-faced PIR insulation, followed by a second layer of 100 mm thick unfaced polystyrene insulation. To avoid direct contact between the roofing membrane and the PS insulation a glass fleece separation layer was added. Afterwards the RENOLIT ALKORPLAN membrane was loose laid and hot air welded. In accordance with the RENOLIT installation instructions the seams were sealed with RENOLIT ALKORPLAN seam sealer. A little bit of effort for extra security! 

This project was one of the largest schemes of its kind ever achieved outside of the capital, featuring the Aquamodul warm blue roof with our Force Dalle BBA approved system.Systems in useWilotekt®-PlusForce Dalle®Aquamodul®Extensive Living RoofChallengesThe roof attenuation rate required was 7litres/sec across the 6500m2, which is extremely low for such a large area, and the u-value of 0.10W/m2K was relatively demanding in terms of thermal performance. It was a project specific requirement that the roof was designed with falls within the slab in order to avoid any ponding water.SolutionsThe design and implementation of a site wide blue roof ensured the development’s contribution to mitigating flood risk in the UK, supporting the protection of England’s waterways. Modelled over a 300 year period, the blue roof design is future proofed in terms of its provision for likely climate change and increases in predicted peak rainfall events.Wilotekt-Plus, second generation hot melt structural waterproofing system, was installed as the Air and Vapour Control Layer (AVCL), which provided an extremely robust waterproof structure during the external envelope and superstructure construction phase. Hytherm ADH thermal insulation and Force Dalle bitumen membrane with anti-root technology were later installed to complete the waterproofing and insulation system.Upon final QA inspection and integrity testing of the roof waterproofing works, the Aquamodul blue roof system, bespoke Hydrosoil Wildflower living roof and standard ballast finishes were installed in conjunction with a Solar PV array, which generated the majority of the building’s electrical energy requirements.

As a company passionate about UK manufacturing, Aston Martin’s choice to work with Polyroof - the only independent UK manufacturer of cold-applied liquid systems - was a natural one.The new roofing system had to be cold-applied to eliminate the risk of accidental fire during installation. New insulation was also desirable to further improve the thermal performance of the roof. It was essential to reduce disruption to the operations of the facility, meaning any new system must be rapid to install with the existing roof predominantly being kept in place.After leaks were reported, The findings of Polyroof’s survey were presented to Aston Martin in the form of a bespoke specification, where the Protec Warm Roof System was the recommended solution. Core tests taken during the inspection had revealed that despite the leaking through the existing PVC single-ply membrane, the existing build-up of 60mm PIR insulation was found to be dry and in sound enough condition to be retained as the base for the new roofing system, saving the client time on the project.It was also identified that the current insulated roof configuration was missing a Vapour Control Layer, meaning the roof was at risk of condensation issues. This problem was designed out by the installation of 120mm Polyroof RES Insulation above the existing single-ply membrane, which was made good to form an effective vapour control layer.By creating a “hybrid” roof with double the insulation above the vapour barrier than below, the risk of condensation was eliminated and this was demonstrated by analysis conducted on the proposed build-up.To eliminate the standing water issues, sumps were placed around the existing outlets, greatly improving their drainage capacity, and offering a highly cost-effective solution when compared to the need to alter the falls of the roof.Polyroof Technical Services visited site regularly to advise and assist architects, specifiers and contractors in all aspects of the project.The finished roof provided a seamless and extra-tough waterproof membrane that was supported by the trusted Polyroof Accredited System Guarantee, with a separate insurance-backing scheme provided at no cost to the client. Aston Martin Lagonda now have the peace of mind that the roof above this landmark facility will be leak-free for decades to come. 

The Post Building development completely remodels the former Royal Mail Sorting Office located on New Oxford Street in Central London into modern Grade A offices, with street level retail and restaurant space along with rooftop gardens, terraces, and leisure areas. The project received a prestigious RIBA London Award in 2022 and the main roof terrace is open to the public, providing panoramic views over the city. In order to gain planning approval, the development had to be repurposed in line with the ‘SuDS manual’ best practice guidance to minimise surface water run-off in the event of a storm and in order to meet the maximum discharge consent limits set by Thames Water.Basement SuDS storage is expensive and often impractical to achieve in city centre locations. ABG’s blueroof system was therefore chosen as an easy to install alternative to provide stormwater attenuation at roof level. The system is installed across three main roof areas and includes 14 restrictor chambers positioned above rainwater outlets to limit the outflow rate. The system is calculated to control stormwater in the event of a 1 in 100 year storm, based on the local Flood Studies Report (FSR) rainfall data, plus 30% allowance for climatic change.The roof design incorporates a variety of surface finishes, including a resin bound play area, biodiverse green roof areas and paved & decked terraced areas. The roof also includes solar PV arrays and planters supported on top of the blue roof.The ABG blueroof system drains like a normal roof during everyday rainfall events, but throughout the critical design storm periods restricts stormwater run-off, continuously releasing rainwater at a controlled rate until empty.The discharge rate is site specific and forms part of the scheme wide SuDS plan, and means that other downstream measures are not required. The scheme also included sedum green roofs to improve site biodiversity across two further areas.ABG provided project design calculations and all blue roof materials required for the different roof levels, plus our installation service.

As part of an on-going, planned flat roofs refurbishment, the Hotel flat roofs existing, ageing coverings were found to be in various state of deterioration.

The sustainable features of this ‘carbon-neutral’ development include excellent insulation, south facing terraces to maximise heat gain from the sun (passive solar gain) and structures built from natural, recycled and reclaimed materials, all sourced from within a 50 mile radius.Systems in useCityflor®Extensive Living RoofOverviewBeddington Zero Energy Development (BedZED) comprises a development of 82 homes in the London Borough of Sutton and is the UK’s largest mixed use sustainable community. It was designed to create a thriving community in which ordinary people could enjoy a high quality of life, while living within their fair share of the Earth’s resources.ChallengesAxter were tasked with providing a waterproofing and living roof solution for the garden terraces and higher level roof areas. As this was an environmentally-friendly housing development, careful consideration had to be taken to adhere to the sustainability requirements of the project. The thermal efficiency of the development was an essential design consideration with all roof areas needing to meet demanding thermal performance criteria. Lightweight extensive green roof systems were chosen for curved and sloping sections of the building due to their low maintenance characteristics, combined with high efficiency Solar PV renewable energy (BioSolar) systems on the roofs. Combining roof top planting with Solar PV improved the system performance and provided a positive visual impact.SolutionsCityflor multi-layer warm roof waterproofing system was designed and specified by Axter to meet the project’s demanding sustainability requirements. The use of a robust air and vapour control layer (AVCL) low permeability membrane, was installed to ensure the building was quickly made watertight during construction, whilst performing the critical technical function of controlling the movement of air, water vapour and heat leakage from within the building.The ideal capsheet choice for the development was our BBA accredited Force 4000 Trafic membrane, due to its anti-root technology and long term proven compatibility with living roofs. The installation of Force 4000 Trafic provided a robust waterproofing surface upon which the extensive living roof could be installed without risk of damage to the waterproofing by follow on trades.Extensive living roofs typically have thin (80mm) growing medium/substrate layers to keep the system depth and saturated load imposed on the building to a minimum. The Hydrolite extensive living roof system was specified because of its ultra lightweight growing medium as this weight reduction was ideal for the project’s unconventional structure. The Hydrolite living roof system was completed with a low maintenance planting design, utilising hardier, more drought tolerant plant species. The planting style was naturalistic with the aim of establishing self-sustaining plant ecology on the roof.AcknowledgmentsAxter worked closely with the project design and construction team to ensure that we were able to deliver a truly stunning and successful project.RAM Roofgarden LTD

Extensive roof glazing refurbishment project including complex saw-tooth roof sectionProducts: em.glaze Monopitch, Northlights and a bespoke walk-on installation

Our Rivius slate roof tiles and appearance roof tiles and Ashington Red Multi brick were specificed for a very impressive project in Hull.

Our technical team were invited to complete a roof survey and condition report of this residential project, where the existing roof area which was suffering from repeated leaks, failed repair attempts and significant standing water.ChallengesUpon inspection it was clear the roof covering had been recently renewed, but the workmanship, attention to details and drainage falls were sub-standard and no doubt contributory to the ongoing leaks and consequential ceiling damage to the areas below.Although the client preferred a robust torch-applied reinforced bitumen waterproofing system, our Safe2Torch assessment picked up some redundant roof plant, combustible cladding interfaces and complex penetrations which necessitated a localised flame free solution.Our team also carried out a level-survey to ascertain the existing falls, and what, if anything, could be done to alleviate the standing water without excessive cost.SolutionsOur comprehensive roof survey report included a dimensioned roof plan, identification of Safe2Torch areas/details, bespoke waterproofing designs for complex penetrations, and a thorough assessment of the existing roof make-up (via core samples) and drainage.Given the apparent age and good condition of half the roof area, it was left in-situ and overlaid with Hyranger single layer RBM system. Minor improvements to the drainage layout, via the introduction of a tapered insulation scheme central to the roof where the outlets where positioned, helped to significantly improve falls. Elsewhere, the rest of the existing roof covering and thermal insulation were stripped back to expose the original asphalt.The asphalt received a new air and vapour control layer before the same Hyranger system, including a mix of both flat board and tapered Hytherm ADH insulation, was installed to improve the falls and correct the thermal performance balance.A Safe2Torch abutment detail to existing cladding was identified early on in the Axter roof survey report as a fire safety hazard, so in accordance with our specification and recommendations, our accredited Axtershield Installer - N R A Roofing & Flooring Services Ltd - expertly installed a Hyranger Neo-Bitumen Flame Free membrane solution around a 900mm wide margin.The Axtershield Installer worked efficiently and to a very high standard to complete the project on budget whilst delivering an aesthetically pleasing and robust waterproofing solution.Systems in useHyranger®Neo-Bitumen® Flame Free

West Kirby railway station’s 1930s platform canopy was long overdue refurbishment. Whitesales were brought in by Briggs Amasco, Network Rail’s roofing contractor, to design, manufacture and install a series of non-fragile rooflights for the 900sq m replacement roof. After our initial roof survey, we specified bespoke polycarbonate Em-Vault continuous barrel vault rooflights. They’re compatible with the chosen Sika Liquid Plastics roofing system and have light transmission of up to 88%. The standard mill finish frame would keep costs low and blend with the canopy's concrete finish.

With its team of experts in the polycarbonate and roof glazing fields, Twinfix works on developing the best, newest and most cost effective roof glazing products. A family business, Twinfix has been involved in the polycarbonate roof glazing market for nearly 30 years. Its innovative Multi-Link-Panel has been used in many markets, such as in the replacement of broken glass or failed PVC in station canopies and depot roof lights, where its patented fixing method results in incredibly quick installation times, a real bonus when working with limited possession times.