Air Tightness Regulations

Building air tightness is now included in the requirements of Part 1LA of the Building Regulations for England and Wales, which specify maximum values for the air permeability of domestic buildings.

The regulations now require most buildings to be tested upon completion to show that these specifications have been achieved. Partial testing at earlier stages can be advantageous if the necessary build quality is to be achieved.

A copy of the regulations is available to download below:

Click here to download the L1 A Building Regulations

The L1 A Building Regulations are supplied in PDF format. In order to view this document, you will need to have the Adobe Reader installed on your computer.

If you do not have the Adobe Reader, you can install it using the link below: