# Navigating Excessive Glazing Calculations: Your Guide to Compliance A house with an extension that requires an excessive glazing SAP calculation # Understanding Excessive Glazing Calculations So, the dreaded day has arrived. The lovely local building inspector has visited your self-build project and has requested an 'Excessive Glazing Calculation' to comply with Part L of the Building Regulations. Before you start tearing down walls (and tearing out your hair!), don't pani
