Overglazed Extension Calculations
The topic of over-glazing is typically brought up in relation to extensions. If the total glazed area is more than the maximum permitted, overglazing may become a problem. This is fixed at 25% of the floor area of the extension.
Achieve L1B Compliance With Your Overglazed Extension
Alternative techniques are listed in Part L of the Building Regulations and can be used to guarantee compliance. The SAP will verify the build's CO2 emission rate and make sure your extension won't have an impact on these numbers.
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