Air leakage – two words you do not want to hear when your new-build is being inspected.
You thought you were running a tight ship during the construction, but all it takes is a hole slightly bigger than the size of a 20 pence piece per m2 to cause a fail in your air test.
So what steps can you take to make air tightness a breeze?
Check pipes and cabling
Make sure all entry and exit points for electrical conduits are sealed or cabled inside an air tight layer.
Windows and doors
It may sound like a no brainer, but check that all doors and windows close properly and that the sealant used is durable and long lasting. A higher quality sealant may be more expensive, but it could prevent remedial fixes later down the line.
Use Registered Construction Details (RCDs)
Air leakage is a common problem where two or more elements meet, such as around windows. RCDs will become your go-to when you’re constructing these areas of the building envelope, as they include points to watch.
Some, like the ones you get with Build Aviator at Jewson, contain product suggestions to help mitigate issues with air leakage.
Put it to the test
Under ADL (Approved Document L), an air tightness test must be undertaken to check the air permeability meets requirements. Make sure that the testing company you use is ATTMA accredited, this means it’s Government approved and one that uses multi-point methods which checks for even pressure distribution throughout the dwelling. Also look for a provider that can offer support prior to testing and to give you pointers on potential problems to fix, to help you pass first time.
Want a little support with all this? Visit www.buildaviator.co.uk to find out more or speak to your local branch about the Build Aviator services now available through Jewson.