British Board of Agrément, BS ISO 9001, ISO 14001, NHBC approved, Compliance with Building Regulations (E&W) Approved Documents L (2010), Part L (2013 amend) Conservation of fuel and power, Part C (2010) Resistance to contaminants and moisture.
British Board of Agrément, BS ISO 9001, ISO 14001, NHBC approved, Compliance with Building Regulations (E&W) Approved Documents L (2010), Part L (2013 amend) Conservation of fuel and power, Part C (2010) Resistance to contaminants and moisture.