RADMAT BUILDING PRODUCTS LTD
HOLLAND HOUSE
VALLEY WAY
ROCKINGHAM ROAD
MARKET HARBOROUGH
LEICESTERSHIRE LE16 7PS
Tel: 01858 410372
Fax: techenquiries@radmat.com
Suppliers of: Flat Roof Waterproofing, Structural Waterproofing, Hot Melt Bitumen Membranes, Waterproofing, Green Roofs, Roof Gardens, Access Decking Podiums, Car Park Roofs.
Radmat Building Products.
Radmat Building Products is an independent British company marketing a range of waterproofing systems for wherever it is required to waterproof a structure or part of a structure.
Radmat Building Products are suppliers of high performance waterproofing materials marketed via specification assistance to architects, consulting engineers and quantity surveyors. The company is committed to providing technical support to the specifier and construction team with the elements of service that give comfort and a satisfactory waterproofing solution to meet the parameters given. Our range of products include:
Blue Roof - Attentuation Modules
A Radmat Blue Roof system offers an effective means of providing a Sustainable Drainage solution (SuDS) in inner city and urban environments, attenuating rainfall at roof level to provide controlled drainage of rainwater from the site. Suitable for zero falls flat roofs, terraces and podiums a Blue Roof can be finished with paving, ballast or a green roof system: delivering amenity and rainwater source control without having to locate storage tanks underground.
MedO Green Roofing
MedO is a green roof solution that uses established green roofing technologies in a simple and straightforward way. A variety of green roof solutions can be created - from low maintenance sedum matting and wildflower meadows, to landscaped roof gardens with lawns, shrubs and water features.
PermaQuik PQ6100 Monolithic Membrane Roofing
PermaQuik 6100 Monolithic membrane roofing system is a one part, hot applied, seamless rubberised self-healing membrane made from bitumen, natural rubbers, and a blend of polymers, further reinforced with a high tensile polyester fabric. This mix combines excellent waterproofing performance with toughness, flexibility, and strong adhesion to a variety of substrates.
ParaFlex Liquid Applied Cold Resin Membrane
ParaFlex is a fast curing, cold applied polyester resin waterproofing system. It is ’wet on wet’ between layers so it doesn’t need to be left to cure between coats. This means a faster application to give a continuous monolithic waterproof material.
EshaUniversal Single Layer Roofing Membrane
Esha is universal waterproofing and roofing membrane not only made from recycled end-of-life bitumen polyolefin products it is also 100% recyclable. A patented manufacturing method Esha is a shrink-free, fully adhered membrane that is more flexible and stronger than conventional membranes and has greater stability and durability.
EshaFlex Reinforced Bitumen Membranes
EshaFlex membranes feature Groove Technology®, a patented underside finish that ensures the heat acts only where it is needed, reducing warming of the membrane and increasing melting of the PE foil.
EshaPlan Single Ply Membranes
Single Ply Membranes for use as mechanically fastened or adhered roof waterproofing on flat or pitched roofs. Suitable for refurbishment and new build applications.
Radmat Protherm Quantum PLUS+ - The world’s thinnest inverted insulation system
ProTherm Quantum is a rigid Vacuum Insulation Panel (VIP). The VIP panel consists of a compressed fumed silica sand microporous core which is evacuated of air and moisture before being encased and sealed in a special thin, gas-tight, hybrid aluminium foil envelope, encapsulated in a solvent free polyurethane waterproof coating. With a declared (aged) thermal conductivity of 0.007 W/m.K, the ProTherm Quantum® PLUS+ VIP panel provides an insulating performance that is up to five times better than other commonly available insulation materials.
ProTherm Rockface A2 – Non-Combustible Upstand Insulation Board
A Non-Combustible Upstand Insulation Board used to thermally insulate and protect upstand walls in inverted flat roof systems. Classified Euroclass A2-s1,d0 to BS EN13501-1:2108 by Warrington Fire under classification report no. 19808F dated 10 10 2019. Building Regulation Approved Document B volume 1 – dwellings and volume 2 - non-dwellings compliant solution for buildings over 18m high in England. Technical Handbook – domestic Annex 2.C and Technical Handbook – non-domestic Annex 2.F compliant solution for buildings over 11m high in Scotland.
Radmat Building : Looking back at the iconic Gasholders in Kings Cross
Architects: WilkinsonEyre Architects
Main contractor: Arup for Argent
Radmat Products used:
– ProTherm Quantum PURE VIP System
– ProTherm Regupol RCM
– ProTherm XPS Infill
– ProTherm G XPS X 300 SL Insulation
A Landmark Restored and Repurposed
Located in the heart of London, initially constructed 160 years ago, the Gasholder frames have been injected with a new burst of life. The cast iron structures have been restored and re-homed to just North of Regent’s Canal as part of the Kings Cross regeneration programme. The original triplet frames have re-purposed around a series of 145 apartments and penthouses contained within the Grade II Listed structures.
WilkinsonEyre Architects won a design competition with with their visionary concept, which integrates three distinct residential buildings within the historic cast iron frames. The architectural design pays homage to the dynamic nature of the original gasholders, where the structures would rise and fall depending on gas storage levels. By varying the heights of the accommodation, the new buildings capture the essence of the gasholders’ former functionality while delivering a modern and refined aesthetic.
Shepley Engineers in Yorkshire spent two years restoring the Grade II listed structures, demanding the expertise and passion of a highly skilled team But first, specialist contractors had to carefully dismantle the structures with 20-ton cranes and transport each section to the Shepley workshop, where they would slowly
be brought back to life. The result is an amazing and most unique highly specified apartments.
Radmat’s Role in the Pioneering Development
Radmat Building Products played a crucial role in supplying state-of-the-art thermal insulation solutions for the distinctive circular roof gardens and external walkways. Designed to enhance sustainability and urban greening, the landscaped roofs provide much-needed green spaces within the bustling city, softening the industrial presence of the cast iron structures while offering breathtaking panoramic views of the redeveloped area.
The unique circular geometry of the apartments presented a significant engineering challenge, requiring an insulation system that could seamlessly adapt to the curved structure while delivering superior thermal efficiency. Radmat’s ProTherm Quantum VIP insulation system was the ideal solution, offering a combination of high-performance insulation, reduced material depth, and tailored adaptability to fit the challenging design constraints.
Tailored Insulation Solutions for a Complex Structure
Radmat’s ProTherm Quantum VIP insulation was chosen for its ability to meet the intricate demands of the project, providing:
Bespoke insulation design to accommodate the curved structure and overcome spatial limitations.
Exceptional thermal efficiency while maintaining minimal insulation thickness.
Optimized installation to ensure seamless integration with the architectural framework.
A bespoke design was meticulously specified to fit the difficult areas, using Radmat’s ProTherm Quantum PURE Vacuum Insulation Panels (VIP) system, accompanied by ProTherm XPS Infill boards, which are designed to be cut and fit around penetrations and curved upstands. The system was then able to be applied to the difficult curvature of the structure with ease.
The ProTherm Quantum system was then supplied over hotmelt waterproofing to the external walkway at Level 1 to provide a level threshold detail. There was a limited upstand height which required a 0.2W/m2K U-value, in addition the roof shape was complex, with a high number of pitch pockets. Hence the ProTherm Quantum and ProTherm Infill boards were carefully designed to fill the space economically whilst still achieving the best thermal and level threshold performance.
Quantum was the only BBA certified VIP insulation on the market able to meet the required U-value and maintain a 75mm waterproofing upstand as per the NHBC requirements. Radmat also provided a full site survey, bespoke layout design and installation support on site.
With a dramatic reduction in depth and no loss of thermal performance, ProTherm Quantum VIP System was the ideal choice to achieve exceptional thermal targets and dramatically reduce the depth of the finished build.
To find out more about Radmat’s ProTherm Quantum Insulation visit: https://www.radmatquantum.com
Radmat PermaQuik – KGX1 Google HQ
Google’s new headquarters in King’s Cross, London or KGX1 is a groundbreaking project that exemplifies innovation and sustainability. Designed by Heatherwick Studio and Bjarke Ingels Group (BIG), the headquarters is often referred to as a “landscraper” due to its unique horizontal design, which stretches over 330 meters – longer than the Shard is tall. Unlike conventional skyscrapers, the building’s low-rise design reflects Google’s intent to create a workspace that is both flexible and sustainable, integrating into the local industrial character of King’s Cross.
The rooftop garden is a standout feature of the new headquarters. Spanning approximately 300 meters, the terraced garden provides green spaces for employees to relax, exercise, or work outdoors. In addition to promoting employee well-being, the garden plays a significant role in enhancing biodiversity and reducing the building’s environmental footprint. The green roof improves insulation, reduces energy consumption, and manages stormwater runoff, while also contributing to air quality and mitigating the urban heat island effect. The design of the garden, which mirrors the cascading layout of the workspaces below, seamlessly integrates the building’s outdoor and indoor environments, creating a harmonious space that connects occupants with nature.
An integral part of the roof construction is the waterproofing. Radmat’s PermaQuik Hot-Melt Waterproofing System ensured a watertight seal with a 40-year guarantee and BBA Certification for the “design life of the building on which it is incorporated.” Combined with Radmat’s Protherm G XPS X 300 SL insulation the construction team was confident that the tiered rooftop gardens, pathways, and various surfaces would be durable and leak-free. Given the 330m length is an activity roof, it was essential for it to support the planted gardens and withstand both foot traffic and weather conditions.
Thanks to its durability, flexibility, and strong adhesion, the PermaQuik waterproofing system was also applied in the underground plenums. This step was crucial to ensure the building’s foundations remained watertight. It is quite an unusual approach and quite difficult to produce so a collaborative approach was needed to maintain its integrity. The system was combined with EshaFlex 370 Reinforced Bitumen Firesafe Membranes and the ReadySeal Cold Liquid Applied Waterproofing Membrane was used to seal steel-work and pipework joints.
The reliability of Radmat’s waterproofing products will ensure the construction remains watertight for very many years to come.
