Air Tightness Testing

SAP Calculations Overheating Calculations SBEM Calculations Energy Statements Energy Performance Certificate (EPC) Sound Insulation Testing Water Efficiency Calculations Ventilation Testing and Commissioning Air Tightness Testing Asbestos Surveys Fire Risk Assessment Planning Application
SAP Calculations Overheating Calculations SBEM Calculations Energy Statements Energy Performance Certificate (EPC) Sound Insulation Testing Water Efficiency Calculations Ventilation Testing and Commissioning Air Tightness Testing Asbestos Surveys Fire Risk Assessment Planning Application

What is an Air Tightness Test?

Air Tightness Testing or Air Permeability Tests – measures how much air is escaping from a building. Air leakage can occur through gaps and cracks in the fabric of the building envelope, allowing heat to escape, thus driving up heating bills and C02 production. This could be through gaps around windows, sockets, or where the external wall meets the floor.

Do I need an Air Tightness Test?

To comply with the building regulation part L, an air permeability test is a mandatory requirement for all new build residential and commercial properties in the UK.

 

Domestic

Under Approved Document L1 2021 each new dwelling must undergo an air leakage test as part of the post-construction testing requirements. The maximum allowable air permeability rate is 8m3/h/m2, however in order to comply with the carbon emission target a lower air permeability rate may be required. The required air permeability rate for each dwelling can be found on the design-stage SAP report for that dwelling.

Non-domestic

Under Approved Document L2, air leakage testing is a mandatory requirement for all newly constructed buildings with a total useful floor area greater than 500m2. Each building tested must achieve a maximum air permeability rate of 8m3/h/m2 (or lower if required within the SBEM calculation).

When do I need an Air Tightness Test?

Ideally the test should be undertaken when the building is as close to completion as possible. As a minimum the building envelope needs to be completed, all major penetration to walls and floors must been made however it is not necessary to be decorated or carpeted.

How we can help to PASS an Air Tightness Test?

We want to help our clients ensure their buildings pass this test first time. Therefore, we’ve designed a simple check list and easy guide to passing an Air Tightness Test:

  • Your external walls, ground and roof are fitted & complete (including doors, windows & cladding).
  • All fixtures and fittings are installed (including all lights & sockets).
  • The plumbing work for the building is complete.
  • Service pipes passing through external walls & ceilings are sealed.
  • All your skirting boards are fitted & sealed at the top & bottom.
  • If there is no skirting board (i.e. behind kitchen units, baths) expanding foam should be used to seal where plasterboard meets the floor.
  • All loft hatches/storage doors into roof voids are fitted with appropriate draft excluders.
  • All housing services (pipes, electric cables, stacks, etc) are boxed in and sealed.
  • There is at least one standard size door in the property that is no more than 2.25m tall by 1.1m wide.
  • Any integral garage doors are fitted with draft excluders.

Designed ventilation systems are excluded from this test. Our technicians will tape up all extractor fans, chimneys, MVHR units, etc to give a more reliable testing score. Overall, this will provide you with an extremely accurate score.

All of our tests are carried out in accordance with ATTMA TSL1 (domestic) or TLS2 (commercial) and all our engineers are trained and registered members of ATTMA.

Get in Touch Today!

For a free quote please call us on 0333 577 5020 or email at info@camsons.co.uk.