What is air tightness testing?

Air tightness is about minimising the uncontrolled flow of air both into and out of a building through gaps and cracks.
 
Uncontrolled air flow accounts for a large proportion of the energy wasted in buildings. Achieving improved air tightness is a key factor in building contractors meeting the Government’s targets for reduced carbon emissions and improved energy efficiency.

Air tightness is a key requirement of Approved Document L Parts 1 & 2 of the Building Regulations for England and Wales, without which, Building Control will not provide a Completion Certificate.

Testing is conducted based upon ATTMA Technical Standards (required by Building Regulations Approved Document 1 & 2). 
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