A Sto external wall insulation system has maximised thermal efficiency for more than 240 homes within a new residential development in Bracknell.
Designed by Building Design Group (BDG) and constructed by Vascroft Contractors, The Grand Exchange comprises 242 apartments divided between two angular blocks. Prioritising environmental sustainability, a range of features has been introduced, including solar panels and a heat pump system.
Working in partnership with BDG and Sto’s authorised installer, Stoneguard, Sto supplied a specification which would enhance the development’s eco-credentials. The StoTherm Mineral K insulation system was selected and designed to achieve a U-value of 0.12W/m²K for the wall structure, exceeding the requirements of building regulations.
The BBA-certified StoTherm Mineral K external wall insulation system achieves a reaction to fire of A2-s1, d0 in accordance with BS EN 13501-1 and uses mineral fibre insulation boards, which optimise thermal efficiency and fire protection. The insulation boards were fixed to the substrate using StoLevell Uni adhesive followed by a reinforcing coat. Sto-Glass Fibre Mesh was then embedded into the reinforcing coat while wet providing the system with crack resistance.
The system was finished with StoSilco K2.0 silicone resin render in white and mid grey to provide high levels of water repellence and protection from harsh weather. The application of StoColor Silco G, a silicone resin façade paint, bolsters durability by protecting the building from algae.
Ian Sired, Project Manager for Sto, said:
“A total of 3,750 sq m of StoTherm Mineral was used across this scheme following extensive preparatory works, including fixing assessments and wind load calculations. Through close collaboration with BDG and Stoneguard, we were able to develop a system meeting the low U-value target ensuring as little heat as possible is lost through the external wall.”
Brought forward by developer SevenCapital, The Grand Exchange also offers a co-working hub, a, resident-only gym, entertainment space, and spa treatments.