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Data Sheet:
Air Tightness Data Sheet

Information suitable for:
New build
Retrofit
  • Responsible sourcing
  • Energy saving

Technical information

Air Testing measures the rate of air leakage throughout the dwelling.

Air Tightness Testing is required on new building dwellings. If on a development, 50% or 3 of every house type (which ever is less) will need to be tested.

If the air leakage is lower than 3m3/h/m2 @50 Pa then a Mechanical Extract Ventilation System will need to be in place to take the stale air out and bring in fresh air.

Hints and Tips

There are ways to reduce the amount of air leakage in a dwelling by:

Seal gaps and cracks

Use joist seals

Use Pro Clima Solitex Plus in roofs

Allow wires to pass through a Pro Clima Roflex

If a dwelling isn’t tested for air leakage then the default should be added which is 15m3/h/m2 @ 50Pa.

For a dwelling which isn’t tested but the same house type has, a margin of +2m3/h/m2 @ 50Pa should be added.