Extensions If the area of glazing in the extension is more than 25% of the floor area of the extension, plus the area of doors & windows that will no longer exist, then Building Control will require you to demonstrate compliance with Part L1B. Using SAP gives you the greatest flexibility as it compares the actual proposal with a 'notional' extension where the area of glazing is no more than 25% and where the thermal elements meet the minimum standard. This is more complex than SAP calculations on a new dwelling and therefore tends to cost more. Contact us now for advice and a fixed price quotation
Building an extension is also an ideal opportunity to make improvements to the efficiency of the fabric and services in the rest of your home. Whether it's wall insulation, a new boiler or installing renewables, we can provide sensible, impartial
advice - just contact us
now or call 01439 788 680.
Whatever your needs - SAPs, water efficiency calculations or just general advice contact us
Proport Eco-Services Daleside, East End Ampleforth York YO62 4DA
SAP Calculations BREEAM Domestic Refurbishment
Energy Statements Sustainability Statements C-Plan
Water Efficiency Calculations Code for Sustainable Homes Impartial advice
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Proport Eco-Services is a trading name of Proport Services Limited. Company No. 5692020 Registered address: 1 Carnegie Road, Newbury, RG14 5DJ