If you are building a new domestic property or commercial property of a certain size, it will need to undergo air tightness testing. This assesses the building for ‘air permeability’, checking for air leakage through gaps, holes and other areas. The Government has SAP (Standard Assessment Procedures) in place for air tightness testing, setting standards buildings must comply with to be energy efficient.
Residential properties and those over a certain size (500 m2) must undergo air tightness testing. Small developments of one or two properties must have one of the buildings undergo air tightness testing. However, if the properties are of different construction then both must be tested separately.
With larger developments, a proportion of the buildings must be tested, depending on the size and construction of the properties. There are exceptions to this and if you have any questions regarding how many need to be tested or about the exceptions, please contact us and we will be happy to help.