OVERVIEW
Located in Tower Hamlets, Gayton House and Sleaford House are managed by housing association Poplar HARCA. Following amendments to Building Regulations, which banned the use of combustible materials in external walls of high-rise buildings above 18m, StoTherm Mineral K was specified to replace the existing EWI system.
BBA-certified, StoTherm Mineral K comprises mineral fibre insulation boards and the system is classified with an A2-s1, d0 reaction to fire in accordance with BS EN 13501-1.
Working on behalf of Westminster Building Company, Square 1 Architectural Solutions was responsible for removing the existing EWI and installing the StoTherm Mineral K system onto four elevations on each 23-storey block. The non-combustible mineral fibre insulation boards were secured to the existing concrete substrate using adhesive and mechanical fixings, and without the need for additional expansion joints.
A StoLevell Duo Plus reinforcing coat embedded with Sto-Glass Fibre Mesh was then applied to the face of the insulation boards. This was followed by the application of 1.5mm stippled StoSilco, a silicone resin render that provides high levels of water repellence to protect the walls from weathering.
StoTherm Mineral K, adhesively and mechanically fixed, external wall insulation system - external wall insulation
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