Proteus Waterproofing

Battersea Dogs and Cats Home in London, the best-known animal sanctuary in the world, is currently undergoing the biggest development in its 154-year history - a £5 million scheme delivered by main contractor, Sir Robert McAlpine. The development will bring the charity’s existing buildings and facilities into the 21st century and will include a new build, state of the art veterinary hospital which will be protected by an innovative new waterproof membrane – Cold Melt® from Proteus – a seamless application designed to work in harmony with the roof infrastructure and so tough that it has been BBA certified to last for the lifetime of the building.Quality Control An integral part of this transformation is the built up roofing system of 1,200 square metres of Cold Melt®. Applied by the Proteus Licenced Contractor, a 5 layer built up system was employed to offer a bespoke specification tailored to the client’s needs and budget.The built up system consisted of a layer of Cold Melt® Proteus’ own innovative, cold-applied liquid membrane, over which an insulation layer of Proteus Pro-Therm XPS was laid. The Licenced Contractor then added a separator sheet of Proteus Low-K followed by an attenuation mat and then three different finishes in three different areas of the roof – paving slabs, a green roof and decking.Health & Safety Proteus’ liquid applied systems are cold installed and therefore negate all the elements of fire risk when working in confined spaces. Of particular importance was the low odour that Cold Melt® exhibits, meeting all the health and safety criteria necessary to protect both the Licenced Contractor’s operatives and the dogs and cats home’s residents.Long term performance Cold Melt® incorporates recycled rubber-crumb and other organically grown products and when covered, creates an elastomeric, seamless and cold applied membrane which has a life expectancy longer that the design life of the building on which it is installed.

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

For the redevelopment of a former builder’s yard in Greenwich into a new build block of live-work units and residential flats, the developers were looking for a roof system which would offer long term waterproofing integrity, exceptional green credentials and enhanced aesthetics. The proposed green roof system would also reduce water run-off, create a wildlife habitat and help towards securing Code for Sustainable Homes Level 4.With a waterproofing system required to protect the concrete deck above the flats, a selection of cold-applied products were provided by Proteus Waterproofing that met the client’s requirements. The specialist contractor worked with Proteus Waterproofing on a specification which included the Cold Melt® inverted waterproofing system, Proteus Pro-Therm XPS and finished with a Proteus Pro-Living® green roof.Fast, hassle-free application The 500 m2 Cold Melt® insulated Pro-Living® roof system was selected by the client and contractor for its ease of installation, cold application and all-round green credentials. After the pre-cast concrete roofing panels were craned into position, the joints were made good ready to accept the Cold Melt® inverted roofing waterproofing system. The inverted roof system incorporated Cold Melt® and Proteus Pro Therm XPS 150mm insulation. A Proteus Low-K Membrane was then applied prior to the application of the Pro-Living® green roof to complete the system build-up.Quality control Proteus Waterproofing worked in close partnership with the Contractor to successfully deliver the project to a very high standard within the required timeframe.Long term performance Incorporating recycled rubber-crumb and other organically grown products, Cold Melt® creates an elastomeric, seamless, cold-applied membrane and can outlast the lifetime of the substrate on which it is installed.

The Tottenham Experience is the largest club shop in Europe, and the facility houses both the Tottenham Hotspurs & their NFL Partners a unique shopping experience. The Tottenham Experience houses an entertainment suite on the top floor which replicates the stadium terracing. The complexity of detailing around the balustrading and steps was overcome by using the internal and external Proteus Technical Team.Proteus Hot Melt® and Proteus Pro-Therm XPS Plus offered the perfect solution.High Performance WaterproofingWith the podium deck covering 1500m2, the Proteus Hot Melt® system combined with Proteus Pro Therm Insulation XPS Plus was the optimum waterproofing solution for this project with a cost effective, seamless and fast application.This High performance solution worked exceptionally well for our Proteus Approved Contractor, who was able to install the system without any complications to the highest standard.Quality controlProteus Waterproofing worked in close partnership with both the Architect, Main Contractor and Proteus Approved Contractor, to successfully deliver the project to a very high standard within the required time frame and to the standard required.Long term performanceProteus Hot Melt® is a long lasting robust membrane design to last. The client required both a BBA Certified product that offered a 25 year Guarantee for the waterproofing system on this project.

On the Grand Union Canal in Hemel Hempstead, the Nash Mills Wharf housing development features a range of stylish new build 1-4 bedroom houses and luxury apartments offering high quality waterside living in this Hertfordshire town.With a waterproofing system required to protect the concrete podium above the ground floor car park, a selection of hot and cold applied products were provided by Proteus Waterproofing that met the requirements of the client Linden Homes. The licensed roofing contractor worked with Proteus Waterproofing on a dual system specification which included the fast and economical Proteus Hot-Melt waterproofing system, and for the intricate detailing around upstands and to avoid hot works around the plastic soil and vent pipes, the Cold Melt® waterproofing system was the ideal solution.Fast, hassle-free applicationWith the podium deck covering 3000m2, the Proteus Hot Melt® system was the optimum waterproofing solution for a robust, cost effective, seamless and fast application. This solution worked exceptionally well for the Licensed Contractor and is compatible with the fast applied Cold Melt® solution which was used for high detail items including plastic soil and vent pipes and upstands. There was also the added challenge of wet brickwork and an exacting building program to keep to. To overcome this problem, Proteus isolated the wet substrate with Pro-DPM Primer (Damp Proof Primer) which can be applied to green concrete 3 days old and then followed immediately by the Proteus waterproofing system. This enabled the Cold Melt® to be installed on to the vertical elevations will no loss of time.Quality controlProteus Waterproofing worked in close partnership with its Licensed Contractor to successfully deliver the project to a very high standard within the required timeframe.Long term performanceIncorporating recycled rubber-crumb and other organically grown products, Cold Melt® creates an elastomeric, seamless, cold applied membrane and can outlast the lifetime of the substrate on which it is installed.

Knolly’s House, a residential block of flats in London, required refurbishment works to the internal communal walkways and concrete stairwells as the existing waterproofing had reached the end of its serviceable life. The waterproofing needed to be fast cure as the communal balconies were the only access to the flats. Therefore, Proteus Waterproofing specified Pro-BW® Plus system.High Performance WaterproofingAs constant access was required by the residents, a fast cure waterproofing system was vital. Pro-BW® Plus was selected as it can be fully installed in three stages, each only taking forty-five minutes to cure before allowing foot traffic. Pro-Aggregate EM was incorporated for a slip resistant finish. Proteus Waterproofing worked closely with the Proteus Approved Contractor to ensure the project was completed to a high standard, including an aesthetically pleasing finish.Health and SafetyTo minimise disruption to residents, particularly on communal walkways which may also form the fire escape routes, the waterproofing system needed to be fast cure. Proteus Waterproofing’s liquid applied systems are cold installed and therefore remove the risk of fire to the building. The low noise application also allowed the Proteus Approved Contractor to complete the works safely.Long Term PerformancePro-BW® Plus is a high performance, rapid curing protective waterproofing membrane for balconies and walkways making it ideal for refurbishment where structural movement has occurred. Pro-BW® Plus reduces installation time from days to hours. Suitable for a variety of external applications, Pro-BW® Plus can be installed on concrete & asphalt for communal and private balconies, walkways, staircases and pedestrian ramps. As it is a cold applied installation, the system meets health and safety criteria by minimising risk to both operatives and members of the public. Pro-BW® Plus is BBA Certified and manufactured in the UK.

The Blackheath Hospital, a private hospital made up of Victorian houses that from the classical façade of the building required a new waterproofing membrane to the plant room roof, after reports of water ingress to the building below. The leaks were caused by the existing box gutter around the slate pitched roof which was found to be an aged timber deck with a broken down felt membrane. The client requested a high performance, cold applied system, therefore Proteus Pro-Cold® was specified.High Performance WaterproofingDue to the nature of the building, a noise free, low odour, cost effective solution was required. A recovery board, bonded in Pro-Bond Foaming Adhesive was first installed, followed by the application of Proteus Pro-Cold® in a two coat fully reinforced process providing a guaranteed 15- year system. Proteus Waterproofing worked closely with the Proteus Approved Contractor to ensure the project was completed to a high standard. Health & SafetyAs the hospital building was constantly operating, the system needed to be installed with minimum noise and disruptions, ensuring the hospital could still operate and patients were not disturbed. As Proteus Pro-Cold® is cold applied it met all the health and safety criteria, as well as keeping disruptions to a minimum. Proteus Pro-Cold® is also certified with the highest European Fire Rating BROOF(t4). Long Term PerformanceProteus Pro-Cold® offers a low maintenance, durable waterproofing and protection solution for a range of new build and refurbishment applications. It is cold applied, eliminating the risk of fire and once cured, provides a completely seamless waterproof protection and has excellent UV stability, making it suitable to use in all climates. Proteus Pro-Cold® forms a seamless, fully adhered membrane and has BROOF(t4) certification.

The Gatehouse in Whaddon, Milton Keynes required a complete roof renewal with a new roof lantern installation. Over the years, the roofs had undergone several failed repairs, therefore, the client required a robust, cold applied, cost effective solution. Proteus Waterproofing specified Proteus Pro-Cold® as it's a single pack, fully reinforced polyurethane system that is cold applied, seamless and elastomeric, providing up to 20 years further life to the structures it is applied to.High Performance WaterproofingThe existing roof was a EPDM roof that had to be completely stripped. The deck was replaced and a complete warm roof build up, including Proteus Pro- Therm PIR insulation boards, was installed and finished with Proteus Pro-Cold®. As ponding was an issue on this roof, a new gutter was created to solve this problem. The client was incredibly pleased with the finish, so much so, that their neighbours have requested our Proteus Approved Contractor to carries out their roofing works. Health & SafetyAs the building is an occupied residential building, keeping the residents safe was paramount. As Proteus Pro-Cold® is cold applied, it met all the health and safety criteria, as well as keeping disruptions to a minimum.Long Term PerformanceProteus Pro-Cold® offers a low maintenance, durable waterproofing and protection solution for a range of new build and refurbishment applications. It is cold applied, eliminating the risk of fire and once cured, provides a completely seamless waterproof protection and has excellent UV stability, making it suitable to use in all climates. Proteus Pro-Cold® forms a seamless, fully adhered membrane and has BROOF(t4) certification.

City Tower, a private apartment tower block located in Canary Wharf required a new high performance waterproofing system as the existing single ply roof had been damaged beyond repair due to a fire. To provide a cost effective, long term waterproofing solution, Proteus Waterproofing specified a Hybrid Tapered Insulation Scheme with a Proteus Pro-Felt® finish, meeting the client’s specific requirements.High Performance WaterproofingAs the existing roof was beyond repair, it needed be completely stripped. Pro-Prime® SA and Proteus Pro-Felt® Self Adhesive Underlay were used as a vapor control layer. Proteus Pro-Therm EPS and Proteus Pro-Therm PIR were used for the Hybrid Tapered Insulation Scheme and bonded using Pro-Bond Foaming Adhesive. Proteus Pro-Felt® 3mm Plain Underlay was then fully adhered to the insulation, followed by a final installation of Proteus Pro-Felt® Ultima Plus Fireguard. Proteus Waterproofing worked closely with the Proteus Approved Contractor to ensure the project was delivered to a high standard.Health & SafetyWhen working on residential buildings, safety is always of utmost importance. Proteus Pro-Felt® Ultima Plus Fireguard has the highest European Fire Rating, BROOF(t4), making it the ideal felt to use on residential properties as the risks to operatives, building occupants and members of the public are greatly reduced. All Proteus Waterproofing specifications promote fire safe installation methods conforming to the industry lead Safe2Torch guidelines.Long Term PerformanceProteus Pro-Felt® Ultima Plus Fireguard is a high-performance multi-layer bituminous membrane system, tested to perform in extreme temperatures and weather conditions. It has class leading modified bitumen content which allows the flexible membrane to move with the building and ensure long term durability and performance. It is certified by the BBA to be in excess of 30 years, and had the highest European Fire Rating – BROOF(t4).

Proteus Waterproofing were contacted to assist with the roof refurbishment for the The Co-Operative Group, Wembley. The existing felt waterproofing and timber deck had failed allowing water ingress into the residential building below. Upon further inspection, Proteus established that the existing roof lacked any insulation and therefore did not meet current Building Regulations. a Proteus Pro Felt® system was specified as a competitive and cost effective waterproofing solution.High Performance WaterproofingThe roof coverings and timber decking had to be removed. A new 18mm ply wood deck was installed to the roof pitches before a high performance Proteus Pro Felt® system could be laid. This incorporated 120mm Proteus Pro-Therm® insulation to ensure all current building regulations were met. Due to the 45 degree pitch of both the front and rear roofs, Proteus needed to design a fixing method to ensure the felt and insulation did not slip in the warmer weather. Proteus Waterproofing worked closely with the Proteus Approved Contractor, to ensure the project was delivered to a high standard.Health & SafetyWhen working on public buildings, safety is always of utmost importance. Proteus Pro-Felt® Self Adhesive Mineral Capsheet has the highest European Fire Rating, BROOF(t4), making it the ideal felt to use on public building as the risks to operatives and members of the public are greatly reduced. All Proteus Waterproofing specifications promote fire safe installation methods conforming to the industry lead Safe2Torch guidelines.Long Term PerformanceProteus Pro-Felt® is a High-Performance range of bituminous membrane system, tested to perform in extreme temperatures and weather conditions. It has class leading modified bitumen content which allows the flexible membrane to move with the building and ensure long term durability and performance with guarantees available up to 25 years.

Comprising of nine shops and several residential flats, properties 29-47 High Street Polegate required a full roof refurbishment after complaints of water ingress into the residential buildings. Proteus Waterproofing conducted a thorough survey which revealed that the existing roof build up, made up of a timber deck and 2-layer felt, had been previously repaired but was now at the end of its serviceable life.Being a residential building with a combustible deck, protecting individual properties from internal fire spread was a key consideration. Compartment walls were identified allowing Proteus Waterproofing to provide a solution that would meet regulatory guidance relating to the junction of compartment walls and roofs in Approved Document B whilst meeting the needs of the client.Proteus Waterproofing specified their robust reinforced bitumen membrane range of Proteus Pro-Felt®, including a bespoke hybrid insulation approach, where instead of a full replacement consisting of entirely non-combustible insulation, a scheme was designed to meet the requirements above and either side of the compartment walls, offering the client the most cost-effective solution possible that would also mitigate any unnecessary increase of weight loading elsewhere on the roof.High Performance WaterproofingThe waterproofing and existing deck were stripped back and re- decked with 18mm plywood. When removing the existing waterproofing, our approved contractor, carefully recorded the exact location of the party walls as no drawings of the upper story flats were available.Proteus Pro-Felt® SA AVCL was used as a vapour control layer to allow for the application of the hybrid combination of 150mm Proteus Pro-Therm PIR insulation and 150mm Proteus Pro-Therm Mineral Wool insulation. A thermal calculation was undertaken to ensure that the final result met the requirements of Part L of the National Building Regulations. These were both adhered with Proteus Pro-Bond Foaming Adhesive. Proteus Pro-Felt® SA Underlay Plain was laid and finished with Proteus Pro-Felt® Ultima Plus Fireguard Mineral Capsheet, providing the client with a fully waterproofed Part B and Part L compliant roof, guaranteed for 20 years.Proteus Waterproofing worked closely with the Proteus Approved Contractor, to ensure the project was delivered to a high standard.Health & SafetyWhen working on occupied buildings, safety is always of utmost importance, as well as keeping disruptions to a minimum. The Proteus Pro-Felt® range have been tested to the highest European Classification of BROOF(t4), making it the ideal system to use on all buildings, as the risks to residents, property and members of the public are greatly reduced. All Proteus Waterproofing specifications promote fire safe installation methods conforming to the industry lead Safe2Torch guidelines. Proteus also have a range of cold liquid applied membranes which are also BROOF(t4) certified.Long Term PerformanceProteus Pro-Felt® offers high-performance bituminous membrane systems, tested to perform in extreme temperatures and weather conditions, while offering clients a robust and cost-effective waterproofing solution. Proteus Pro-Felt® Ultima Plus range retains its high polymer performance. Its class leading, high quality modified bitumen content allows this flexible membrane to move with the building and ensure long term durability and performance with third party BBA accreditation and guarantees available up to 30 years.

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. Following surveys by Proteus Waterproofing, some of the flat roofs were assessed to be still suitable to be overlaid, some had aged beyond economic recovery, requiring removal. Proteus Waterproofing were asked to design and supply a high-performance replacement, selecting the most suitable roof system from its wide range, for each roof. This phase required:One roof to be overlaidOne roof to be stripped back and upgrading the roof deck by over-decking with new 18mm plywood.Once prepared, both roofs received the new Proteus Pro- Felt® Ultima Plus Built Up Roof system with Proteus Pro- Therm Insulation PIR to deliver the required performance to comply with Building Regulations Part L and BS 6229:2018.  Long Term PerformancePro-Felt® Ultima Plus BUR offers a durable waterproofing and protection solution for new build and refurbishment projects, is BBA Certified and available with a range of guarantees.High Performance WaterproofingWorking on occupied buildings, safety is always of the utmost importance. Pro-Felt® Ultima Plus BUR system reduces risk by incorporating a cold installed, self-adhesive air vapour control to be bonded to the new plywood roof deck. Proteus Pro-Therm Insulation is cold bonded to the air vapour control, to comply with current Building Regulations Part L. The specification was prepared according to the NFRC ‘Safe2Torch’ guidelines.

Scarborough Spa, a Grade II listed building and venue for conferences, exhibitions and events required a new waterproofing membrane as the existing felt roof had reached the end of its serviceable life. Following a site survey, Proteus Waterproofing specified Proteus Pro- Felt® Ultima Plus, along with a Cut to Fall insulation scheme, providing a long lasting, bespoke, waterproofing solution.High Performance WaterproofingA built-up roof system was installed with Cut to Fall insulation and Proteus Pro-Felt® Ultima Plus felt. As the roof was had many changes in levels, Cut to Fall insulation was essential. It was designed so water could be directed to suitable outlets, significantly reducing water retention on the roof. Proteus Waterproofing worked closely with the Proteus Approved Contractor to ensure the project was completed to a high standard.Health & SafetyWhen working on occupied or public buildings, safety is always of utmost importance, as well as keeping disruptions to a minimum. Proteus Waterproofing always promote fire safe instillation methods. The Proteus Pro- Felt® range conforms to the industry lead Safe2Torch guidelines and is also certified with the highest European Fire Rating BROOF(t4). Long Term PerformanceProteus Pro-Felt® Ultima Plus is a high-performance multi-layer bituminous membrane system, tested to perform in extreme temperatures and weather conditions. This membrane is impervious to water and will achieve a weather-tight roof. It has class leading modified bitumen content which allows the flexible membrane to move with the building and ensure long term durability and performance which is certified by the BBA to be in excess of 30 years.

Emma House, Romford, a residential apartment block built in 2007, needed a new waterproof membrane for the entire roof area after the single ply membrane, installed just 10 years earlier, had failed. The specification by our clients asked for a cold applied system to be used during the refurbishment to minimise disruption to residents, while providing a permanent waterproofing solution.The ChallengeCore samples taken of the roof build-up showed there had been extensive water penetration which required urgent remedial action. Impossible to repair, the complete roof system had to be stripped back to the roof deck by Proteus Waterproofing’s approved contractor. The approved contractor installed a new Proteus Pro-System® BUR (built up roof system) incorporating Proteus Pro-Therm insulation, to provide a new seamless roof – an area of some 150 square metres – offering a 20 year guarantee.Why Proteus Pro-System® was specifiedProteus Pro-System® was installed using no heat, providing a seamless waterproofing membrane on completion. Proteus Pro-System® is a high performance, seamless and cold-applied waterproofing membrane for flat and pitched roofs. It cures to provide completely seamless waterproof protection and has excellent thermal and UV stability, making it suitable for use in all climates.Proteus Pro-System® does not brittle, deteriorate or discolour with age. It uses atmospheric moisture to trigger its cure process and unlike conventional polyurethane systems can cure under water, without gassing or foaming. It also becomes resistant to rain damage and may therefore be applied in relatively poor weather, without any subsequent loss of performance or durability – making it ideal for Emma House.About Emma HouseEmma House consists of 14 one-bedroom and 19 two-bedroom apartments just minutes away from the centre of the market town of Romford, which offers shops, services and a wealth of bars and restaurants. When first built in 2010, Emma House offered young professionals an opportunity for affordable housing close to London and has remained at the forefront of the property market in Romford ever since.

The Proteus Waterproofing roof survey carried out found the existing flat roof system to be saturated. The existing roof build-up needed to be stripped back to the roof deck, with the main challenge of the roof refurbishment being the low up-stand heights available to the penthouses.The project required a flat roof system manufacturer involved at the initial roof survey and specification design stage, followed by the manufacturers technical back-up to assist with unforeseen and unexpected situations to ensure a successful installation of the new roof systems.High Performance WaterproofingThe terrace roofs above hated spaces demanded a waterproofing system with BBA certification. The fully bonded and seamless Pro- System® Plus was selected for its high performance and low odour, in conjunction with Proteus Pro-Therm Insulation to improve the roofs thermal performance and reduce the existing condensation risk.The flat roofs that were not above heated spaces required Proteus Pro-System® Plus low odour, seamless waterproofing overlay. Proteus Waterproofing worked closely with the Client and the Proteus Approved Contractor, which also acted as the Main Contractor, to ensure the installation complied with the specification design.Health & SafetySafety on construction sites is always of the utmost importance, as well as keeping disruptions to other trades to a minimum. Proteus Pro-System® Plus was selected for its high performance, low odour, phased cold installation and seamless waterproofing.Long Term Performance​Proteus Pro-System® Plus creates an elastomeric, seamless, cold applied waterproofing membrane. The Proteus Pro-System® Plus system can include warm roof insulation. The membrane does not become brittle with age, is BBA Certified with a durability statement of at least 30 years.

Project OverviewThe Welbourne development in Tottenham Hale, a £100m flagship project forming part of a wider £500m regeneration scheme led by Related Argent PLC in partnership with the London Borough of Haringey, has delivered 1,030 newhomes alongside retail, healthcare and public amenity spaces designed to revitalise the area.At the heart of the development’s sustainability strategy was the installation of a blue roof on a central podium, an area designed to manage stormwater, improveinsulation and support biodiversity. Proteus Waterproofing®, and its Attenu8® System, worked closely with architects CZWG and United Infrastructure to deliver a technically advanced solution.Attenu8®’s modular attenuation and drainage system was perfectly suited to meet the complex requirementsof the project, providing both water storage and controlled discharge while integrating seamlessly with the waterproofing layer and podium finishes.The podium now provides both a recreational terrace for residents and a green, attenuated surface capableof safely managing stormwater flows, contributing to energy efficiency and supporting plant and insect life, a demonstration of how urban regeneration can align with sustainable environmental design.Project Materials & Build-UpProteus Waterproofing®, a leader in waterproofing, thermal insulation and blue roof systems, combined its expertise with ACO Technologies to deliver the ultimate integrated solution.The podium build-up included:• Concrete deck with proprietary expansion joints• Proteus Hot Melt® waterproofing system• Proteus XPS Plus Insulation• Proteus Attenu8® structural drainage and attenuation system consisting of geocells, secondary waterproofing, and graduated falls from 285mm to 60mm• Access units around roof outlets and restrictors• Permeable resin-bound aggregate finish for planters and play areasThis complex layering ensured long-term waterproofing integrity, excellent stormwater attenuation and sustainable functionality.ComplexityThe Welbourne podium presented a unique challenge. The original blue roof design was intended for a flat deck - however, insurer requirements meant that a 1:80 minimum fall across the podium was needed.Proteus therefore designed a tapered blue roof attenuation system, incrementally stepped across a 30m span to maintain the correct water retention volume, while avoiding interference with surrounding residential blocks and surrounding resin-bound finishes. This bespoke system incorporated an emergency overflow compliant with EN 12056 to manage excess stormwater, while maintaining the environmental and recreational functions of the podium. Multiple roof levels, sloped sections, integrated planters and access points for maintenance further increased the installation complexity - which meant that the Proteus team had to work closely with CZWG architects to ensure the design remained buildable and compliant with planning and sustainability requirements.WorkmanshipThe Proteus Hot Melt® membrane was applied over the concrete deck, followed by a structurally tapered drainage layer and blue roof attenuation cells. Custom edge detailing prevented water ingress along perimeter edges and substrate and suitable plants were tailored to cope with variable sunlight and wind exposure across the roof.Mock-ups of roof sections were constructed and reviewed prior to fullscale installation to ensure alignment with the design. Proteus conducted regular inspections to maintain quality and resolve on-site challenges, including phased integration with existing green roofs and access thresholds.InsulationThermal performance was enhanced using Proteus Pro-Therm XPS Plus insulation, ensuring the podium met building regulations and energy efficiency targets. With a verified Environmental Product Declaration (EPD) and a U-value of 0.14 W/m²K, the insulation reduced heat loss, minimised summer gains and contributed to the building’s long-term sustainability. Project ManagementSuccessful delivery relied on coordinated project management across multiple stakeholders. With constrained urban access and ongoing construction, deliveries were timed outside peak hours to minimisedisruption. Installation sequences were also carefully planned to prevent congestion and maximise efficiency.Furthermore, weather contingencies were incorporated to address heavy rain and wind, while ongoing communication with the client ensured expectations were met or exceeded.The team consistently aligned the Attenu8® blue roof installation with the broader SuDS strategy, maintainingboth programme and budget targets without compromising performance.Health, Safety & Environmental ManagementHealth, safety, and environmental considerations were paramount throughout the project. Comprehensive risk assessments and informed safety protocols were essential, including the addition of fallprotection systems and regular training for operatives. Welfare facilities were provided on-site, while dust, noiseand waste control measures reduced environmental impact. Proteus also ensured that all contractors were trained to the highest standards before installation, by providing on-site guidance to operatives due to the unique tapereddesign of the blue roof. All this meant that the team overcame several unexpected challenges, including redesigning the podium for sloping falls, coordinating deliveries under restricted access and adapting to variable weather conditions.Flexibility, real-time problem-solving and close collaboration with architects and suppliers, also allowed Proteus to deliver a robust, functional, and aesthetically pleasing Attenu8® blue/green roof system.