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Air Tightness Testing

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Air Tightness Testing - The Building Regulations.

The Building Regulations 2006 Approved Documents L1A (Domestic) and L2A (Non-Domestic) came into effect in April 2006, requiring air tightness testing to be carried out in new properties. This was followed in 2013 and 2016 with further revised documents.

Uncontrolled ventilation in dwellings and other buildings through leakage paths around doors and window frames accounts for a significant proportion of heat loss, particularly as the insulation value of walls and glazing has improved. In order to control this energy loss, the Building Regulations will regulate the overall leakage of the building structure by testing, using a pressurising / depressurising fan method.

Air Permeability.

Air leakage is quantified as air permeability, which Is the leakage of air (m3/hour) in or out of the building, per square metre of building envelope at a reference of 50 Pascals (Pa) between the inside and outside of the building.

New dwellings will be required to achieve a minimum standard of 10 m3/h.m2 at 50 Pa. However, the target air permeability set out in the SAP calculations (sometimes called Q50 / DAP figure) for a property will frequently be lower than this.

Air Tightness Test.

The air tightness testing of the building would be carried out in accordance with the Air Tightness Testing & Measurement Association (ATTMA), Technical Standard 1 - Measuring Air Permeability of Building Envelopes for domestic testing. Testing would be carried out in accordance with the ATTMA Technical Standard 2 for non-domestic testing.

Orchard Place - "Efficient, On Time, Good Job" - Victoria Geary of Globe Estates.
Portland Villas, Hove - "We have always found Acoustic Associates to be a very reliable & professional company" - Stephen Packham of Packham Construction Ltd.

Acoustic Associates are competent through ATTMA to undertake domestic (Sussex and Peterborough) and non-domestic (Sussex) air tightness testing and can also issue Certification and Test Reports.

We are currently the ONLY Sussex based company with ATTMA Registration who also have level 2 testers in-house. This enables us to be able to test a whole range of larger commercial properties in addition to testing dwellings.

In addition to single-fan residential/commercial testing we can test with Multiple fans, for large buildings (up to 80,000m2 envelope area), for tall buildings (up to 20 storeys) and for complex layouts in buildings where spaces are not commonly linked.

Building variations include but are not limited to:

  • New Commercial Extensions
  • Industrial Buildings
  • Dwellings
  • Hospitals
  • Retail Units
  • Schools
  • Care Homes
  • Office Buildings
  • Shell & Core
  • Sports Facilities

Other Services of Interest

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Air Tightness Testing
Case Studies:
Westbrooke Developments & Roffey Homes
Premier Inn & Beach Residences
Relevant Reading, Regulations & Guides

Contact Acoustic Associates Sussex Ltd.

Unit 8 Highdown House
Cecil Pashley Way
Shoreham (Brighton City) Airport
Shoreham-by-Sea
West Sussex
BN43 5PB

Phone: 01273 455 074

Email: web@aasussex.co.uk