Air Permeability Info


Air permeability testing plays a key part in establishing the energy efficiency of a building


EAP Calculations are used to determine the energy performance of a dwelling


ACS provides island wide coverage to a variety of clients

Also known as Air Pressure, Air Leakage or Air Tightness Testing – the procedure measures the uncontrolled flow of air through gaps and cracks in the fabric of the building.

Air permeability testing plays a key part in establishing the energy efficiency of a building – and as regulations tighten it will be increasingly necessary to make design considerations for air tightness early on in a build. On – completion testing measures the effectiveness of your air leakage strategy by establishing routes of leakage in the finished envelope.

If a test fails or there is more leakage than planned, a good test engineer will be able to indicate leakage areas, and in most cases suggest suitable remedial measures. DEAP Calculations are used to determine the energy performance of a dwelling, and it is within that assessment that a design, target air permeability will be set. This is a number below 7m3/h/m2 at 50 Pascals as a back stop value under the current Regs., but increasingly likely to be under ’5′ due to ever more stringent client requirements.

Air Permeability Testing – How many tests?

ACS provides island wide coverage to a variety of clients from large developments to one-off self builds. We can also test all non-domestic buildings.

Our NSAI registered Assessors comply fully with Building Regulations requirements, applying standards with calibrated equipment.
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Air Permeability Testing – Which and How Many?

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ACS (Axiom Construction Services)
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