Wintech can provide whole building air leakage testing, which is now a Building Regulation outlined in Approved Documents L1A (residential buildings) and L2A (commercial buildings).

Air leakage testing is carried out once the building envelope is completed. A door-mounted fan system is used to create building pressures of up to 50 Pa during which the air leakage of the building is measured as defined in the test standard. The measured air leakage must not exceed the SBEM or SAP calculations for that building.