WestWood Liquid Technologies Limited

Lawrence Hall is a Grade II listed property. A brown and brick stone building sits in front of a concrete framed hall featuring high vaulted ceilings with circular skylights made from Georgian wired glass.The existing warm roof construction had reached the end of its serviceable life causing water ingress throughout the building.A new warm roof system was installed featuring Wecryl 230 for the waterproofing layer. This high-grade PMMA-based resin is cold applied with a Weplus fleece reinforcement resulting in a durable waterproofing membrane that is highly flexible and permanently weather resistant.The thixotropic version of Wecryl 230 was used to waterproof around the large circular rooflights situated on three levels of the building. With a thicker consistency and rapid curing time, this PMMA resin was ideal for the vertical upstands. Wecryl 230 was also applied around the windows at all roof levels combined with Weseal 815, a highly flexible, fibre-filled waterproofing product for sealing minor penetrations.Running the length of the main hall is a considerable amount of glazing with small upstands. After removing the existing asphalt from below the windowsills, the substrate was repaired before applying Wecryl 810, a rapid curing putty, which can be used to quickly fill small cracks and joints, and to smooth out uneven areas.A small high-level terrace area was also stripped and replaced with a new warm roof and protective cement board. The waterproofing membrane was installed with a trowel on wearing layer and topped with quartz sand to increase slip resistance. 

A complete refurbishment of the Millstream West roof was needed as it had suffered significant failures over the years resulting in saturated insulation. The roof comprised two distinct sections; one housing extensive plant equipment, such as air handling units (AHUs), and the other accommodating M&E elements and numerous PV panels. The complexity of the plant area, filled with pipework, cabling, and ductwork, made access and waterproofing difficult. Furthermore, the office space below had to remain fully occupied throughout the project, demanding minimal disruption and careful logistical planning.The failed single-ply and warm roof system was replaced with WestWood’s Weproof 264 system. This low-odour waterproofing membrane ensured the work could be completed without affecting the office environment below.In the heavily encumbered plant area, coordination with M&E contractors was critical, especially when installing around inaccessible sections. Reduced-thickness insulation and a waterproofed cement board were used to repair crushed insulation in these areas, while additional protection was provided with Wecryl 420 Textured Coating.The southern half of the roof, which had fewer M&E elements, allowed for quicker progress. Mechanical airflow systems were introduced in enclosed areas to combat airflow limitations, ensuring the highest health and safety standards were maintained.

Situated above Rochdale Exchange Shopping Centre, this busy car park was suffering from damaged asphalt. Car tyres had caused numerous dips on the surface and the curbs were also in need of repair.These failings demanded a high-performance waterproofing and surfacing system, which could be installed while the car park remained open to the public.To rectify issues with the asphalt deck, Wecryl 842, a fast-curing repair mortar was used to fill and level the defects.As large humps of asphalt had been used to encapsulate the street lighting cables, these areas were cut out and new cabling installed. The surface was then reformed also using Wecryl 842. This solution removed the humps, preventing the risk of ponding water and achieving a more aesthetic finish.New pedestrian walkways were coated with WestWood’s Wecryl 420. This resin was manufactured in a vibrant green colour to match the shopping centre’s branding and create a visual connection between the car park and retail space.

The terrace had issues with standing water and, being in a coastal location, was exposed to harsh marine conditions and weathering. The challenge was to create a solution that not only provided robust waterproofing but also offered an aesthetically pleasing finish to suit the unique style of the development. The intricate design needed to maintain precision, particularly with the tile effect application across raised deck areas, which required exceptional attention to detail.WestWood’s PMMA liquid waterproofing solution was specified for its durability and UV stability, ideal for the marine environment of San Remo Towers. The tile effect finish was created using 6mm tape, applied by hand, to form precise grout lines over the terrace, including the challenging raised areas. This process was managed by a skilled operative, ensuring the diagonal design remained straight even as it continued over the 180-meter perimeter.The WestWood system not only resolved the standing water issues but also enhanced the thermal performance of the building, providing a robust, trafficable surface for residents. Weekly site visits by WestWood’s regional field technicians offered continuous support and ensured the project maintained the highest quality standards throughout.

The Tesco Chester car park was in urgent need of repair. Failing asphalt was causing water to leak into the store below. A new waterproofing system was required to enhance the car park’s structural integrity and increase drainage capacity.The refurbishment also demanded repairs to the concrete deck, which was cracked along the joints and had a soft surface filled with voids. If left untreated, these voids would have resulted in pinholes throughout the finished waterproofing system.Following removal of the failing asphalt, Wecryl 821, a low-viscosity concrete stabiliser, was applied to the concrete deck, preventing pin holes forming throughout the system.Larger cracks in the deck were filled with Wecryl 810 Flexible Putty prior to applying more than 5,000 linear metres of banding. Expansion joints were also installed throughout the structure, enhancing durability.Following the preparation of the concrete deck, WestWood’s Wecryl 279 waterproofing was applied, providing flexibility and exceptional crack-bridging properties.Tested according to Class OS 10-20 of the DAfStb guidelines, Wecryl 279 is resistant to mechanical stress, acids and alkali. Additionally, the system allows for customised surface designs, including a wide range of colours, patterns, and markings – ideal for the car park application.Large areas of ponding water, caused by inadequate drainage, posed a potential health and safety risk during the winter. To tackle this challenge, WestWood helped to design a customised drainage system. New symphonic outlets were installed together with WestWood’s extensive range of rapid-curing levelling screeds and mortars to eliminate the risk of any future ponding.

WestWood’s innovative and durable solution offered outdoor communal space for a high-end, thriving office building in the centre of London. WestWood Liquid Technologies designed a new terrace provision to replace original materials that were not performing effectively. Water ingress was therefore impacting the occupiers and tenants in the floors below.

The Old Pump Works is a new-build residential scheme. Forming part of the development are two-storey apartment blocks each designed with curved green roofs to complement the rural landscape. To ensure a robust, homogenous waterproofing solution for the green roofs, WestWood’s Wecryl 230 PMMA-based resin was specified by Emperor Roofing Ltd.

The Plaza shopping centre in Wokingham required a comprehensive refurbishment of its multi-functional car park, which also serves a local gym and provides permit parking for residents. The roof deck, inter-decks, and the main entrance and exit ramp had all suffered from failed waterproofing, leading to concrete substrate issues that required immediate attention. The refurbishment had to take place while keeping the car park operational, creating complexities around noise, dust suppression, and maintaining a safe environment for patrons during the works.To begin the refurbishment, the existing waterproofing system was removed using specialised 'ride on' plaining plant designed for multi-storey car parks, which ensured the concrete roof slab remained intact. To manage dust and noise, water drums and bowsers were used to dampen the deck. More than 200 sq. m of defective concrete was removed and responsibly disposed of through concrete recycling. Before applying WestWood’s PMMA system, the damaged concrete areas were repaired with specialised mortars and sacrificial anodes to address corrosion. Surface preparation included the use of captive blasting and Westwood's 821 ultra-low viscosity stabiliser to eliminate outgassing. The fully crack-bridging WeCryl OS 10 279 system was then applied with a wearing layer of quartz sand and final coloured sealer coats to ensure durability.The main entrance and exit ramp were waterproofed using a buried Westwood system, finished with tarmac. Contractors, Cemplas, completed this part of the project within the two-week window granted by Highways.

Specialist contractors, Cure Roofing Ltd. from Sheffield, installed a race track design using WestWood products inside his 1,000 sq. m car garage. The building, which was a former milking parlour on a farm outside of London, has undergone refurbishment to house Shmee’s ‘Shmeemobiles’

WestWood Liquid Technologies was tasked with providing a waterproofing membrane for The Wedding Cake, a 12-meter-tall sculptural pavilion designed by Portuguese artist Joana Vasconcelos. Located within the Rothchild Foundation’s Waddesdon Estate near Oxford, the pavilion, inspired by Baroque architecture and Lisbon’s ceramic traditions, required a waterproofing solution that balanced durability with aesthetic appeal.Constructed as a steel modular structure by Westgreen Construction and featuring thousands of ceramic tiles in delicate shades of pink, green, and blue, the art piece needed to be both functional and visually aligned with the artist's vision. The project presented technical challenges, including ensuring the structure’s watertight integrity and achieving a precise colour match for the waterproofing materials.WestWood delivered a robust waterproofing system using its PMMA-based Wecryl technology, known for its flexibility, crack-bridging properties, and rapid cure times. The Wecryl 230 waterproofing layer was applied across the pavilion’s three levels, including the stairways, walkways, and terrace areas. This cold-applied liquid membrane ensured a durable, fully-cured bond, preventing water from seeping into the structure. In addition, a customised, colour-matched Wecryl 420 non-slip wearing course was used to ensure safe access to the structure without compromising its aesthetic integrity. The colour matching was critical, as the waterproofing solution needed to seamlessly blend with the pastel ceramic tiles, maintaining the artistic design. Despite cold weather conditions during installation and the complexities of cross-border collaboration, the project team successfully overcame these challenges.

Complete roof terrace refurbishment with tile-effect finishProgressive Coatings Ltd., in partnership with WestWood, installed a durable waterproofing system on two roof terraces totalling 460m². The solution included a tapered PIR insulation scheme for effective drainage, covered by impact-protective cement board. WestWood’s warm roof system with a tile effect finish provided the aesthetic enhancement required. To ensure minimal weather-related disruptions, Progressive adjusted work practices, sealing partially completed layers daily to protect the terraces from rain and adjusting schedules to avoid extreme temperatures. Despite access limitations, about 40 tonnes of material were removed by hand to prepare for the new installation.