Extension & Conservatories
Legal Requirements (Building Regulations Part L1B)
... all extensions to existing buildings have to comply with the "Standards for new thermal elements" set out in Table 2 of Part L1B of the Building Regulations ...
Table 2 sets the upper limits (worst case) for the u-values of the envelope of the extension. These u-values are sometimes refered to as the 'elemental backstops'.
... an 'extension' to a dwelling is deemed to be a 'conservatory' if the glazing area of the extension is greater than or equal to 25% of its floor area ...
Conservatories, as well as complying with the 'Standards for new thermal elements', requires a further calculation (CompSAP) to demonstrate that the heat loss of the conservatory is less than or equal to the heat loss from a 'notional' extension of the same dimensions.
Calculation Methodology (CompSAP)
The energy calculation undertaken for a conservatory is referred to as a CompSAP (Comparative Stanadard Assessment Procedure).
In other words to achieve Part L1B compliance for a conservatory we need to do the CompSAP calculation.
Outline of the CompSAP process
|Setup Stage (we set up the job on our computer and produce a Fee Proposal & Contract)|
|Design Stage (we consult with the Agent and produce a Final Report)|
Pricing Pricing depends upon the complexity and location of the building. If you would like more information, advice or a quotation, then please call
Pricing depends upon the complexity and location of the building. If you would like more information, advice or a quotation, then please call