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Air Tightness Testing - Navitus
For further information and advice on Air-tightness testing including our guide:
"Air Tightness Testing - The Essential Guide to Part L of the Building Regulations 2007 for dwellings and good practice for commercial buildings""

For further advice, please contact our Air Tightness Testing team on 01 443 3951 or This email address is being protected from spambots. You need JavaScript enabled to view it..

Current building regulations require mandatory air pressure testing for all new dwellings. Air Tightness Testing Pic 1

Air leakage is the uncontrolled flow of air through gaps and cracks in the fabric of a building. Improving air tightness in a dwelling can reduce air leakage.

An air tightness test measures the flow of air within a building. 

The aim of air tightness is to "build tight, ventilate right". This means that there are no breaks or gaps in the building fabric envelope and there is complete control over the ventilation system within the building. Having an airtight property does not mean there is insufficient air flow, it means there is controlled air flow.
Air tightness testing highlights areas of heat loss. These areas increase a buildings energy consumption and, as a result, the amount of money the building is wasting. Air tightness and thermal imaging can locate these areas and therefore allow you to make the necessary changes to increase the energy efficiency of your home.

The only satisfactory way to measure air tightness is by using blower door test equipment.

An air pressure test is mandatory for all new dwellings since the 1st of July 2008.

Air tightness testing highlights areas of heat loss from a building and consequently money wasted. NAVITUS have blower door testing equipment for residential and commercial properties.Air Tightness Testing Pic 2

BENEFITS OF AIR PRESSURE TESTS
  • Air pressure tests can be used to increase the energy efficiency of existing dwellings.
  • Air leakage testing helps identify areas of a building experiencing heat loss.
  • Air leakage testing helps minimise energy usage in a dwelling.
  • Air leakage testing plays a vital role in achieving an "A" rated BER certificate
  • Air pressure tests in conjunction with Thermal Imaging can locate the inefficiencies in your building
WHAT ARE THE GUIDELINES IN RELATION TO DEVELOPMENTS?
 Number of Units  Number of Tests Required
 1-4  One Test *
 5-40  Two Tests
 41-100  5% of Dwelling Type
101+ (if target is reached)  2%
 101+ (if target is not reached)  5%

* For small developments, of no more than three dwelling units, a specific pressure test may not be necessary. If it can be demonstrated that during the preceding 12 months a dwelling of the same type constructed by the same builder achieved an acceptable standard.


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