The Building Regulations
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Before you carry out any structural work, or construct a new extension or loft conversion, you must first ensure it all complies with Building Regs.
Typical examples of works requiring consent are:-
Alterations to drainage, strengthening roof structures, removal of chimney breasts, fitting roof windows, and demolishing or making new openings in walls. Some works added recently to the list are: constructing conservatories, fitting replacement windows, and even some electrical alterations.
The Building Regulations are grouped into ’approved documents' (A to P) according to subject.
Architects and Chartered Surveyors base their designs around these requirements. The normal procedure is to produce drawings
( typically 1:50 or 1:100 scale) of the proposed works and submit them to your local council Building Control Department, where they will be checked for compliance.
For larger projects you may be asked to obtain structural engineer’s calculations, so the Council can be sure the loads are adequately supported.
some typical Local Authority BC guidance notes
Summary of U-value Requirements
U- values for extending buildings
U-values for renovating buildings
Renovation of thermal elements
Replacing the covering on a flat roof now triggers the requirement to upgrade insulation ( to 0.18)
The ‘trigger values’ are now 50% of area of the element being renovated (was 25%) or 25% of the total building envelope.
e.g. if removing plaster from a bedroom wall, the relevant area = the external wall in the room – not the area of the whole main wall.
Download BUILDING REGS DOCUMENTS here
Other useful Building Regs Publications
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