TGD L 2011 – 0.1.3.1 – Existing dwellings

0.1.3.1 This amendment applies to all works to existing dwellings that are covered by the requirements of the Building Regulations, including extensions, material alterations, material changes of use and window and door replacement. In carrying out this work, the aim should be to limit energy requirements for the operation of the dwelling and associated CO2 emissions as far as practicable as required by Regulation L1. Specifically, Regulation L2(d) provides that replacement oil and gas boilers should achieve a seasonal efficiency of 90% where practicable. The key issues to be addressed are: – (a) Fabric insulation: providing reasonable levels of fabric insulation in all new construction, including the limitation of thermal bridging including, where provided, replacement windows and doors. Guidance is given in sub-sections 2.1.2 and 2.1.3; (b) Air tightness: limiting air infiltration through the newly constructed elements as far as practicable. Guidance is given in sub-section 2.1.4; (c) Boiler efficiency: providing an efficient boiler or other heat source as set out in sub-section 2.2.2; (d) Building Services Controls: where new space and/or water heating services are provided, controlling, as appropriate, the demand for, and output of, these space heating and hot water services. Guidance on appropriate measures is given in sub-section 2.2.3; (e) Insulation of pipes, ducts and vessels: limiting the heat loss from pipes, ducts and vessels used for the transport or storage of heated water or air, as set out in sub-section 2.2.4.

C:BCARTGDtgd LTGD%20L%20DWELLINGS%20-%202011TGD%20L%20-%20DWELLINGS%202011%20-%20SECTION%200.1.3.1.pdf