"roof forms"

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

The former ToysRUs premises in Luton required complete refurbishment and part of the project involved renovation of the metal roof. Liquasil's BBA Approved Metalseal 20 system was specified because it includes the advanced, SWT Primer to treat cut edge and spot corrosion in-situ. The metal gutters were lined with Liquasil's Gutterseal, seamless liquid gutter lining system. Upon completion of the metal roof coating project, the unique, Liquasil Latent Defects Insurance Guarantee was issued. The Liquasil guarantee includes cover for Professional Design, meaning that you can specify Liquasil products with 100% confidence.

Our premium granite TerraPave® flagstones were a perfect choice for this scheme at one of London’s foremost rooftop cocktail bars and pizzerias. Skylark Roof Garden, located on Kingdom Street, sits on the 10th floor of Paddington Central, offering incredible views overlooking the beautiful Notting Hill, on the banks of Little Venice. For this project, a combination of Pedestals and TerraPave® flags were utilised. The incorporation of Pedestals (stools on which the flags were laid) , meant no base was required. The depth of TerraPave® flags is calibrated as part of the manufacturing process, delivering exceptional dimensional accuracy which in turn delivered consistent levelling across the terrace. Project architects, Allies and Morrison selected our TerraPave® Flags, in Rimini and Milano Ground due to their rich, distinctive styles and impressive durability in highly pedestrianised areas. These flags are produced with locally-sourced, natural aggregates instead of pigments meaning their unique colouration won’t fade. TerraPave® also offers a cost-effective, and practical alternative to traditional stone paving. The £80m Paddington Central scheme was completed built by Wates Construction and designed by Allies & Morrison. Some of the impressive project’s additional features include London’s highest basketball court, an external glazed stair tower, and a public colonnade around the retail space on the ground floor.

Sliding-Over Fixed Rooflight Maximises Light In Mansard Roof Extension Case Study

Project: Creative Centre, York St John UniversityClient: Tate+Co ArchitectsScope of project: Design and supply 24 bespoke-sized rooflights for the roof of a triple-height atrium to fit within apertures in a glulam timber grid.Products: 24 bespoke sized em.glaze rooflights, some with concealed actuator smoke ventsThe ChallengeThe roof of the striking 14m, triple-height atrium, which forms the centrepiece of the newly opened Creative Centre at York St John University, features a glulam timber roof grid. Architects Tate+Co wanted to punctuate that grid with bespoke sized rooflights to bring even more light into a space which is used as an exhibition, teaching and theatre space, as well as somewhere for students to mix and relax. The rooflights had to have a sleek, minimalist aesthetic, in line with the overall design intent of the atrium and, because almost all the services in the atrium are hidden, needed to be available with matching concealed actuator smoke vents.The SolutionWhitesales designed and supplied 24 bespoke-sized em.glaze rooflights which suited the specification perfectly. The flush-glazed glass-to-edge design of the em.glaze units with flat sealed glass units fitted within a fully welded, thermally broken aluminium frame achieved the lean, crisp look the architects were looking for. The fact that they were also available with fully concealed actuators in the smoke vents supplied by our affiliate business Sertus was an added bonus. All the rooflights were supplied for the project complete with preformed 300mm PVC splayed upstands, which enabled them to be fitted directly into the glulam grid, saving the contractors time on site. They were also fitted with specially coated glazing which allowed for a degree of solar gain and contributing to the low energy requirements of the BREEAM Excellent rated building.‍The BenefitsAs well as the meeting the design specification, Whitesales’ technical team helped to ensure that the em.glaze rooflights could be installed quickly and efficiently by the main contractors Kier Construction. We estimate that our recommendation to supply the units with preformed 300mm PVC splayed upstands saved the roofing team at least two weeks on site because they didn’t have to construct the upstands themselves and the integrated splay made waterproofing the roof a lot easier. Tate+Co Director Andy Baker-Falkner is delighted with the em.glaze units: “We liked the lean, crisp design of the Whitesales em.glaze units, particularly with the clean white reveal and option for fully concealed vent actuators.”

ProjectSurespan designed and manufactured these huge electrically operated sliding glazed roof hatches also provide free airflow of 7m² for smoke ventilation!These bespoke designs were part of a redevelopment on Great Portland Street in London. The covers were 4610 x 1955mm and featured an electrically driven opening motor.Product: The covers provide 7m² free airflows (As it is sliding there are no obstructions to the ventilation) according to approved document B (fire safety) paragraph 5b diagrams C.7.The glazing features laminated and heat-strengthened low iron glass to L40.A further fixed rooflight was also supplied to the size of 4935mm x 1955mm, the thermally broken multi-pane rooflight provides natural daylight

This is an example of an asbestos roof cleaning and coating project using a closed box pressure washer and the BBA Approved Asbestoseal asbestos roof coating system from Liquasil. Specify Asbestoseal with confidence, as it's the only BBA approved system on the market for this purpose. It also comes with the unique Liquasil Latent Defcts Insurance Guarantee, including cover for Professional Design. Need more information? See our NBS specification or call 0121 709 5352. Liquasil is owned and run by Chartered Building Surveyors. We will help you with your specs!

Axter Ltd and Empire Roofing Systems Ltd were engaged by the library directly to upgrade the existing roof covering which was underperforming thermally and in terms of drainage falls.Systems in useHyranger®Neo-Bitumen® Flame FreeStarcoat® PMMAOverviewDesborough Library and Community Hub took over responsibility for the running of the library service in Desborough in 2020. With that came the maintenance of the library building itself. Over time, certain parts of the building had deteriorated. There were leaks and sections of standing water across the 100 square metres plus of flat roofing that forms part of the roof structure.The client applied to The National Lottery Community Fund for a grant that would be used to refurbish the roof area. The Library and Community Hub were fortunate enough to obtain the necessary funding for the work to go ahead.An overlay of the existing system was proposed to utilise the current build up, including a cut to falls insulation scheme to comply with Building Regulations Parts L & H, and BS 6229:2018. Safe2Torch principles were followed throughout with some creative detailing agreed between the contractor and manufacturer due to combustible elements and areas of asbestos.An excellent finish was achieved within budget and in a timescale of 3 weeks.ChallengesAxter were brought in following initial core sampling that was completed by Empire Roofing Systems. The roof area was assessed, and a robust solution was proposed which would alleviate the standing water seen across the roof area, while also improving the thermal performance of the building up to a 0.18 U-Value to comply with Building Regulations: Part L.The existing system was in fair condition but had reached the end of its guaranteed life with no leaks reported and core samples returning dry. There was a noted lack of maintenance across the roof area and significant challenges apparent in terms of detailing due to fire risks and asbestos present.SolutionsBased on the condition of the existing system we were confident that an overlay would be the most cost-effective option. Our Hyranger® multi-layer RBM system was installed using gas driven torches to fully bond the AVCL and capping sheet. The underlayer was installed over a tissue faced PIR and therefore needed to be self-adhesive to reduce the risk of fire, complying with Safe2Torch guidelines. Our hot air applied Force® Neo Bitumen system was installed in the areas of fire risk, and our cold applied Starcoat® PMMA liquid system was installed in areas where a hot air application would be problematic.A cut to falls scheme was designed based on our onsite survey, allowing water to flow freely to the outlets. This alleviated the risk of water buildup and thermal degradation caused by ponding water.Axter’s quality assurance team regularly attended site and were in constant communication with Empire Roofing’s operatives. This was to ensure that the system was being installed correctly and to the expected standards, in order to achieve the Silvershield guarantee required by the client. To achieve the Silvershield guarantee level, all materials and workmanship had to be installed as per the Axter specification. The installation of the roof area was completed to exceptional standards, leaving the client very impressed with the workmanship.System and ProductsAxter’s Hyranger® system was used across the main roof area. The system is fully BBA and Broof T4 compliant, and comes with a single point 20 year Axter Silvershield guarantee that covers materials and workmanship. This was signed off by our Quality Assurance Team who audited throughout installation.Safe2Torch principals were adhered to throughout. Our Neo-Bitumen® Flame Free system was predominantly used on any areas of fire risk, as well as our Starcoat® PMMA for the tricky details where a comprehensive weld may not have been possible.Acknowledgments"We knew of Empire Roofing Systems from another good job they had completed for us on a separate part of the building, and asked them to quote for repair of the troublesome flat roofing.Empire and Axter came up with a plan to make the roof drain properly and we went ahead with their quote.The work went ahead on schedule and to plan without any disruption to the running of the Library and Community Hub and took around two weeks to complete.The guys worked hard and were always helpful and polite when we asked any questions about the work in progress. We had an issue with a blocked internal drainpipe which was quickly and effectively dealt with by Jim and his team from Empire.We are delighted with the end results and have the assurance that the work has been inspected by technicians from Axter themselves and comes with their written guarantee." Gil, Desborough Library

Penrhyn Heather Blue slates from Welsh Slate feature on Lincoln’s Inn’s Great Hall. One of London’s most unique buildings is enjoying a new lease of life, thanks to Welsh Slate. The Great Hall and Library Buildings of The Honourable Society of Lincoln’s Inn, an association of students, barristers and judges and one of the four Inns of Court, have over the past two years undergone an extensive programme of external conservation carried out by expert stone masons Capital Stone.  The programme of work includes replacement of the Great Hall’s slate roof covering. Work is still ongoing, with anticipated overall completion in April/May this year, but the work to the Great Hall roof is complete, as is the striking of the temporary roof covering which brings the new roof into view.  The Great Hall and Library Buildings were constructed from 1843 to 1845. The Great Hall roof was originally covered with lead but was recovered in 1868 with slate. From 1871 to 1873 the Library was extended eastwards by three bays. The building is an important example of 19th Century Gothic Revival architecture and has been listed Grade II* since 1951.  After 154 years, the slates on the roof of the Great Hall required replacing to protect the interior, including a striking fresco and beautifully worked oak. The slates were suffering from surface delamination and a large proportion had slipped due to nail rot, requiring tingles to hold them in place. The existing slates were found to originate from both the Ordovician and Cambrian deposits of North Wales – the former predominately on the eastern elevation and the latter on the western. The large Ordovician slates, typically 850mm long and between 350mm and 500mm wide (and laid to a fixed gauge of approximately 350mm which equates to a head lap of approximately 100mm), originated from what is now Welsh Slate’s Ffestiniog quarry, which is currently mothballed, while the other quarries producing these no longer operate. The Cambrian slates from the Llanberis region, as well as Bethesda where Welsh Slate’s main quarry is based, were even larger, at 850mm long and wider than 450mm, laid to the same gauge. Both slate types were fixed to timber battens on open timber rafters, with the underside torched with horsehair and lime plaster. These were replaced for the closest Welsh slate match – Welsh Slate’s County-grade Penrhyn Heather Blues, at 800mm long, widths of between 400mm and 550mm, and a 350mm gauge and 100mm head lap. These are guaranteed for 100 years, with a useful life of 150 years. While the roof is generally simple in form, with two large slopes, its substantial size at circa 800m2 meant the work took considerable time to complete. To allow for more than a dozen dormers the Welsh Slate had to be cut and fitted to size with double copper clout nails. The thickest slates were used on the eaves, diminishing towards the ridge to maintain the original visual finish. They were also holed from the rear to provide a slight countersink to the face. The Great Hall operates by day as a dining hall for members of the Inn, and by night, as a venue for dinners, receptions and weddings for up to 400 people. Set in 11 acres of beautiful grounds in Holborn, Central London, it is the closest Inn to the Royal Courts of Justice. Henry Skinner, Head of Projects and Facilities Management at The Honourable Society of Lincoln’s Inn, said: “The replacement of the roof covering was far from straightforward, despite its externally simplistic construction. During stripping of the existing roof covering, we had to deal with atmospheric lead contamination of a horsehair felt that sat between the original slates and close boarding, requiring controlled measures of removal and disposal.  “Furthermore, the close boarding had warped over time, causing an undulation between roof trusses that needed to be spaced out. This was achieved through the introduction of additional battens and packing timbers to create a level surface onto which the new slate could be laid.” Casey Wickers, trainee quantity surveyor with Capital Stone Renovation, said: “The main work of stripping the existing roof was extremely challenging and labour intensive, to not only remove, wash and handle each slate manually through a tight scaffolding design, but also doing so whilst wearing full RPE due to the lead contamination. “With the two stunning roof facades in full view, the quality of the Welsh slates can be seen by all.

Our coatings look after the world’s most iconic and acclaimed buildings. Among them is the Auckland Art Gallery Toi o Tāmaki. Since its redevelopment in 2011, the principal public gallery in Auckland, New Zealand has won 23 awards and counting, including the prestigious World Architecture Festival's 2013 World Building of the Year. The redevelopment plan aimed at restoring and preserving heritage elements and sensitively combining them with 21st-century design. This included earthquake-proofing and heritage restoration of the 1887 and 1916 components of the main building and the addition of new, contemporary elements that increased display space by 50 per cent. One of the most distinctive features of the new building is its roof design, which forms a series of fine ‘tree-like’ canopies that define and cover the forecourt, atrium and gallery areas.Our coatings complemented this architectural challenge of blending old with new. A coatings system comprising of Interzinc 42, Intergard 251 and Interthane 990 was used to protect structural steel, while Interchar 963 was used to provide essential protection from the effects of fire.

Initial project meetings first started in early 2008, the clients owned a small cottage on the site which had been extended several times during the 80’s and had permission to make further adaptations. The mixture of building standards meant that their home was extremely drafty and very energy inefficient. The site itself is particularly exposed. The design which achieved planning permission was a crescent form which steps and slides into the slopes on the site. The crescent formation is in direct response to solar orientation.The brief was to design a building which would accommodate the family for many years into the future, the planned occupancy would be for 5 adults. Additionally, the home will be used for large family occasions. A requirement was set for a minimum 16 seated spaces to be available for dining during these family occasions.Op-Deck was added into the scheme very early into the design process as the way of creating the highly insulated structural floor as the house was being designed under Passivhaus standards. The overall U-value of the property is 0.1w/m2K as standard. The system was installed on the lower and ground floors and also the roof.

The new generation of M-Tray® modules were used on this office building in Poklington, Yorkshire. This project was in the heart of the Vale of Yorkshire, within and Area of Outstanding Natural Beauty and planning sensitivities dictated a green roof was needed on the office building. The clients wanted the existing farm buildings, which had been converted into offices and storage space, to blend into the hillside with the structures having the very lowest impact on the surrounding countryside.The timber framed building meant a low weight solution was required so the 100mm deep pre-grown modules were ideal.