"roof form"

New Era cradles were used to lay a level decking system on a roof terrace that had natural sloped drainage. We used UC4 treated external swedish softwood battens and composite decking to ensure long lasting and maintenance free-use.

The waterproofing to a large residential flatted development in London was carried out using the Koster TPO membrane.This warm roof design incorporated the Koster TPO Fleecebacked membrane mechanically fixed through PIR insulation, Koster Vapour Barrier and into the timber substructure as per the wind load calculation.An interesting project with many challenges that were all individually designed by the Koster technical team in collaboration with the project architects.The final roof incorporates hard standing areas, sedum and green roof sections, a solar panel farm and decorative stones.A beautifully deigned and usable area providing residents an amazing view over London.

Historic Kent landmark St Alphege Church gets a newly refreshed roof in keeping with its age and character thanks to Glendyne.

Surespan manufactured and supplied over 86 different access hatches including;Hydraulic HIAC coversStainless Steel Internal HIAC coversStainless Steel Roof HatchesThe HIAC hatches were primarily 1800 x 1800mm and were rated FACTA Class ‘B’ vehicle loading. They were hand pump operated via hydraulic cylinders. A further 70+ covers were manufactured in stainless steel to fit 1220 x 1220mm with 50mm and 80mm recesses. The internal HIAC was 600 x 600mm and featured gas spring assistance, 20mm recess for marble and a polished stainless steel top trim.The Roof Hatches supplied were 800 x 900 and 600 x 600mm stainless steel and were fire-rated for up to 2 hours. They were powder-coated RAL 9010. 

The Multi-Link-Panel system glazed with Georgian wired polycarbonate from pioneering polycarbonate roofing supplier Twinfix was specified by Network Rail for the entrance canopy element of a £1 million refurbishment of historic Wigan Wallgate station in Lancashire. The glazing panels, each comprising fast-track “fix and link” aluminium structural bars glazed with 6mm solid Georgian wired polycarbonate, were pre-assembled at Twinfix’s factory in Warrington, Cheshire, for delivery to site for installation by specialist contractor Everlast Rail.

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

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

The Grade I listed Round Tower (dating from the 1400’s) is a fortification at the entrance to Portsmouth harbour it overhangs the Portsmouth sea front making it susceptible to coastal weather. It’s current waterproofing system needed replacing, The IKO Permaphalt System was chosen due to the 20 year guarantee it offered and the previous heritage projects IKO have successfully helped preserve with various waterproof solutions. Existing coverings were removed and replaced by Southern Flat Roofing & Pitched Roofing Ltd, providing a surface that would withstand constant foot traffic as well as the weather that many seafront structures suffer from.

This project involved a high-rise office being refurbished. Being in the Central London and nearing completion meant a busy site. Ultra fast and mess-free installation was essential. M-Tray®’s were delivered to site on pallets and quickly unloaded. The M-Tray®’s stackable design meant it was easy to transport through the (finished) building and elevator. The individual trays were then carried up the final flight of stairs to the rooftop. As the trays simply clip together they are quick and easy to install. In just 4 hours a the roof space was transformed into a green roof.

Covering an area of nearly two acres (7,600 m2), the Holt Farm dairy complex includes two large and three smaller cattle buildings used for milking, housing, feed storage, offices, and viewing gallery. The complex typically houses 240 dairy cattle, yielding an average of 7,500 litres per year that is supplied to a nearby dairy processing facility. Holt Farm’s dairy complex is L-shaped with five interconnecting ridge-roofed buildings that create four internal valley gutters. The original fibre cement roof with badly yellowing old-style roof lights had deteriorated and suffered storm damage; the owners decided that a cost-effective new roof was required.

Valley gutters with limited access on fragile asbestos cement roofs are always difficult to maintain and repair. A liquid gutter liner is often the only solution in cases like this and none are easier than Liquasil’s Gutterseal system. The metal gutter was first cleaned and dried, then treated with a coat of Liquasil’s corrosion treatment before being over-coated with Liquasil one liquid gutter liner. All joints were treated with Liquasil Non Sag Sealer, providing a fleece-free, very strong joint and seamless gutter lining.

Following the acquisition of planning permission, the Hollinwood Business Park, a former brown field site, will see seven new office buildings constructed, all in the style of cotton mills built in the 1800s.The first of these buildings, Block G, has now been constructed and is benefitting from the installation of renewable solar PV technology to ensure the new business park can have a sustainable future in the decades ahead.The project has seen the installation of 114 Marley SolarTile® panels on to the roof of a large building that forms part of the all-new Hollinwood Business Park in Oldham.Marley’s SolarTile® solution was specified to provide access to a sustainable energy source that will help power the newly constructed site, helping to control energy costs and provide an additional attractive incentive to companies looking to relocate to the business park.

The centrepiece of the building at 80 Fenchurch Street is a stunning glass atrium that spans the entire length of the core structure, flooding the lower floors with natural light and providing a breath-taking arrival experience when entering the building’s lobby.Radii AG were commissioned to utilize their intricate knowledge of glass to produce a dynamic, multi-storey frameless glazed atrium that matched the ambitious design intent.An additional consideration was for the atrium to accommodate the stepped, angular elevation changes due to the terraced roof gardens on the top five levels.The finished atrium at EightyFen epitomises Radii AG’s core philosophy of extracting the full capabilities of glass as a building material.Structural, acoustic and fire rated performance all formed a part of the finished installation, allowing Radii AG to provide a bespoke, technical solution alongside dramatic visual aesthetics.

Green innovation was at the forefront of designs for a stunning, award-winning family home created at Manaton, in the heart of secluded Dartmoor. Rhepanol hg was selected for the three distinctive green roofs that help to shape the character of the large, four bedroom Devon property, which incorporates a raft of measures to minimise its environmental impact.

The £14m Arnold Hill Academy is part of the Priority School Building Programme (PSBP) and is being constructed adjacent to the existing school in Nottingham. The new Academy’s 3,570m2 flat roof covers 8,200m2 of replacement teaching space, science labs, an indoor sports hall and a drama studio. The project team at Wates Group had already identified potential roofing products. Due to the unconventional roof specification they asked SIG Design & Technology to recommend a product that would work in tandem to deliver the required performances.

This project involved the removal of the existing factory finish to an industrial unit in the West Midlands, followed by cut edge corrosion treatment and full roof & parapet coating. Once the original finish had been removed using high pressure jet washing, all of the end laps to the roof sheets were coated with SWT (Surface & Wet Tolerant) corrosion primer, to prevent further rusting. Once cured, the roof was coated with the BBA Approved Metalseal 20 to a film thickness of approx 300 microns.

Greenford Quay is one of the UK’s largest ‘Build to Rent’ schemes with 1,965 new homes being built across seven main buildings. The aim of the development is to create a vibrant mixed-use neighbourhood at the side of the historic Grand Union canal. More than 1400m2 of GeoCeramica® has been installed across the communal areas of the £151 million Greenford Quay development, with 150m2 used to provide a highly aesthetic finish to the communal roof terrace on the tallest tower in the scheme. To view the whole case study please click the link below.

Dedicated to the memory of John F. Kennedy, whose great-grandfather, Patrick, was born in the nearby village of Dunganstown, this arboretum near New Ross, County Wexford, contains a plant collection of presidential proportions. The Arboretum was established in 1968, following a visit by Kennedy whilst President to the area in 1963, and it covers 252 hectares and contains over 4,500 types of trees and shrubs from all temperate regions of the world. A visitor centre houses engaging exhibitions on JFK and on the Arboretum itself. The original structure at the heart of the Arboretum is a masterclass in timber post and beam construction, although the exposure to weather in the south of Ireland provoked some deterioration in the building fabric and to the original roof. PAC DESIGN STUDIO, Dublin, were appointed by the Office of Public Works to survey and establish a contract for fabric replacement and repairs to this beautiful structure, which were completed in 2021. The original roof was replaced and the new roof now features PREFA PREFALZ P.10 Dark Grey Standing Seam. A & A Quinn Roofing Solutions Ltd, Wexford, carried out the installation of the PREFA PREFALZ to the new roof.

Our client was a major nursery stock grower in British Columbia with a very large sedum green roof project in Vancouver. The architect was concerned about future-proofing the green roof and wanted to ensure that, if ever they had issues with their waterproofing seal or any other aspect of the structure, the green roof could be taken up without too much disruption. It was decided that a modular solution would be the best route. M-Tray® was included in a worldwide competition to find the most suitable modular design and was judged as the best product available.

Architects Dixon Jones specified 600m2 Junckers solid oak flooring for Marlborough Primary School, a multi award-winning building on a densely populated urban site in the Royal Borough of Kensington & Chelsea. The brief to create a primary school much larger than the original Victorian building on the existing site challenged Dixon Jones to design a school where teaching accommodation is arranged vertically around a series of cascading roof terraces. With nursery and reception classes on the ground, children progress upwards through the building the older they get, with the junior years arranged on the upper floors. The interior forms an equally dynamic environment for students and staff with teaching spaces arranged around communal halls and generous circulation areas. A large main hall and multi-use space, flooded with natural light from two central roof lights, features Junckers wide board oak flooring throughout, providing a natural, unifying backdrop. Junckers’ FSC and PEFC certified floors are a durable, long-lasting choice with low lifecycle costs. Made in solid wood, the floor can be sanded and refinished multiple times without losing its good looks or performance, ideal for a thriving community school. Main contractor: Mace; Joinery contractor: Swift Crafted; Photography: Paul Riddle. 

Neaco’s Techdek aluminium grille system has been specified as maintenance access walkways totalling over 232m in length on the roof structure which crowns the 51,000-seat Estadio BBVA Bancomer in Monterrey, Mexico. Designed by The Kansas City-based Populous, the $200 million stadium is home to Club de Fútbol Monterrey. It features more premium seating than any other football stadium in Latin America and is the most expensive stadium ever built in Mexico. The aluminum-clad design reflects the history of brewing and steel manufacturing in Monterrey with the silhouette of brewing stills inspiring an asymmetrical shape.

Metalseal 20 was specified to re-brand a small industrial estate in Swindon. Roofs and external cladding were all stripped of existing finishes using vapour blasting. Cut edge corrosion was treated using SWT Primer and all metal surfaces were coated with BBA Approved Metalseal 20 roof & cladding coating. The finish is now graffiti proof, with any graffiti simply washing off with water, with no ghosting residue. The project is covered by the unique Liquasil latent defects insurance guarantee (including cover for professional design).

As competition for schools construction projects remains high and costs are driven down, the need to meet standards of robustness, energy efficiency and acoustic performance become more challenging. At a school for girls, four roofs totalling over 2000m2 required two different finishes, three different build- ups and, crucially, one single Labour and Materials Warrantee to cover all four under our PI Insurance.

The roof to a Waitrose distribution centre has been completely refurbished in a single ply membrane system chosen for its sustainable credentials and no disruption to the retailer’s 24/7 operations at Aylesford near Maidstone, Kent. Supplied by SIG Design and Technology, 10,200m2 of IKO’s Spectraplan single ply membrane was specified for its ability to contribute to a BREEAM Very Good rating for the project which is in line with Waitrose’s mission to ‘tread lightly on the environment’.

This is an asbestos cement roof refurbishment project, using the BBA Approved Asbestoseal system from Liquasil. The roof was first cleaned using a steam cleaning machine and all metal fixings were treated with Lqiuasil's SWT Primer. All fixings and cracks were sealed with Non-Sag Sealer before the roof was completely coated with Asbestoseal 20, providing long term protection against the elements. A 10 year Latent Defects Insurance Guarantee was issued upon completion.

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

The new Faculty of Arts building at University of Warwick designed by Feilden Clegg Bradley Studios brings the departments of the Arts and Humanities faculties under a single roof for the first time. The light-filled, timber-lined space is formed around and imposing internal staircase clad in Junckers’ solid ash flooring.The stair rises from a base of amphitheatre seating andrises through the building connecting teaching, social learning, public exhibition, and departmental spaces throughout which all branch off the central staircase. Entirely clad in Junckers’ solid ash, the central stair forms the main route through the building’s open, inviting, and flexible spaces. “The stair provides a space for daily informal meeting as well as a place for events and occasions such as documentary filming, graduation photographs and whole faculty celebrations. The use of natural timber, combined with natural light brings a warmth and a sense of timelessness to the space.”David Harris, Associate, Feilden Clegg Bradley StudiosJunckers’ solid ash has excellent strength properties and makes a hard-wearing, long-lasting floor. Often used in contemporary interiors, ash flooring adds natural warmth and character which can provide a good balance to clean lines and hard surfaces. The unique grain structure of ash makes it a characterful floor, similar in pattern to oak but with its own distinct colour tones. With its capacity to reflect an abundance of natural light, it is an ideal flooring choice for the project.The flooring contractor was Capital Floors Ltd. 

New development Colindale offices is recently home to London Borough of Barnet staff and community facilities. Furnitubes has supplied 6 table and bench sets and a further 7 independent benches from the RailRoad Inline range, with ‘Delta’ supports that can be readily bolted down to the decking of the new roof terrace located on the 4th floor. Eleven RailRoad planters have been placed in the gravel margins to perfectly compliment the nearby seating, and planted with contemporary box topiary balls.

Bury St Edmunds Train Station required building envelope works due to the ageing condition of Grade II listed building managed by Walker Construction. A significant issue was water damage caused by water ingress through an inefficiently waterproofed roof, invasive plant species growing through brickwork, and debris around drainage points.The solution:AlphaGuard PUMA Liquid Applied Flat Roof System

This is an installation of the BBA Approved Metalseal metal roof coating system from Liquasil Ltd. The project is in North Shields and involved removing the delaminating factory finish, treating the cut edge corrosion and then coating the whole roof in Metalseal 20, in Goosewing Grey.

Mayfair, London Our modular green roof solution, the M-Tray®, has transformed what was previously a fairly unsightly bitumen rooftop at a Mayfair hotel into a beautiful green space for guests to enjoy. Conversion of the 13sqm space was awarded to Wallbarn after we successfully completed the hotel group’s first green roof project at the Radisson Heathrow. Being so easy to transport our M-Trays®were selected as the fastest and most efficient way of converting the unused space into a lush, green and aesthetically-pleasing space. The installation only took half a day with minimal disturbance to guests.

Located to the south of Newark, Middlebeck is a 694-acre urban extension which will provide new housing, access to local amenities and a new purpose built primary school. The Christ Church C of E Primary School has been constructed to serve the local community and boasts an attractive design by Gollifer Langston Architects, with the L shape plan of the new school forming two sides of a courtyard.Constructed by the Lindum Group, the attractive and contemporary design of the new school building embraces the use of natural daylighting and the extensive use of glazing helps to strengthen the connection between interior and exterior spaces. Senior’s slimline SF52 aluminium curtain wall system has created a light and welcoming entrance, with Senior’s versatile SPW600 aluminium windows and secure SPW501 aluminium commercial doors used throughout.Robust and fully recyclable, Senior’s aluminium fenestration systems were powder-coated to further enhance durability and to complement the white brise-soleil installed to the south side of the building to help control solar gain. Additional solar shading protection from the overhanging roof, in addition to the use of natural ventilation, photovoltaic roof panels and underfloor heating also contribute to the overall sustainable design of the school building.Senior worked closely with supply chain partner Alusec to deliver the fenestration package.

Woolwich Works (previously known as Woolwich Creative District) is a £31 million project by the Royal Borough of Greenwich to restore five heritage Grade II listed buildings on the Royal Arsenal, creating a new landmark cultural hub for London. With large-scale, flexible performance and event spaces, rehearsal studios, bars and a café, the site will be home to a number of local, national and internationally-renowned resident artistic companies including Punchdrunk, the hugely successful immersive theatre.The major investment brought a series of landmark historic buildings back into use to form the creative district. Bennetts Associates have been appointed to carry out the plan to transform five buildings, including The Carriageworks, previously known as Building 19. The work to the building included sensitively restored roof and windows to ensure adequate soundproofing. The Mace Group, and Arc Waterproofing were delivering Woolwich Creative District, transforming a historic military complex into a major cultural destination.

Ibstock Place School opened its newly built refectory in 2021. Designed by Maccreanor Lavington the competition-winning design is a dedicated space for the most communal part of the school. With a high ceiling and intricate woodwork, the open space is functional but uplifting.The high-level roof lanterns form a chimney to pull out hot air during the summer as well as fill the space with soft natural light, which is perfectly accented by acoustic dampening panels of oak.Handmade Bricks from Freshfield Lane were used in the construction of the cloister and work perfectly with the school’s previous uses of brick. Additionally, the choice of bricks helps set the building within its tranquil garden setting. The handmade Freshfield Lane brick helps the building age gracefully into the landscape while retaining a notable elegance. This sophisticated taste is mirrored inside by soft copper notes and long, hanging light fittings.

Perry Hall Academy, a large primary school built in 1949, with original waterproofing still in-situ. IKO assisted the Academy funding bid by providing a detailed survey report, including intrusive core sample analysis. The roofs were suffering from water ingress, cracks in the mastic asphalt, pooled water and poor heat retention, so decision was made to replace the roofs throughout. New rooflights were also specified to allow more natural light in while the design chosen reduced the external noise transmission. IKO worked with specifier Concept Education Services to deliver the project (some work during term-time) within 6 months.

Bespoke Sliding Over Roof Rooflight For Concrete Frame House Building Case Study