Full consultation & testing for air tightness

We deliver the full range of consultation, testing, research and renovation proposals to get your trouble with draught, heat loss, dampness or mould solved.

This service is suitable for new building projects an existing houses.

Please find some images about our range of consultation down below.

Please feel free to contact us, if you want to get your issues solved instantly.

Air Tightness Testing

We deliver air tightness tests, according to ISO 9972 (Thermal Performance of Buildings - Determination of Air Permeability of Buildings - Fan Pressurization Method).


To achieve a good final testing result, we recommend a preleminary test for the building during the construction stage. Because of the fact that the final test (official test according to Part L, for inclusion in BER) has to be made at the very end of the construction phase, the options to eliminate possible existing leakages are very limited.


There are two main values, regarding the air tightness of buildings - the air change rate (𝑛) and the air permeability (𝑞𝐸).

The air change rate shows the quantity of air changes per hour at a certain pressure differential (usually at 50Pa)

The air permeability indicates the air leakage rate per square meter of the building envelope at a reference pressure differential. This is the mandatory value here in Ireland, as coming from Part L of the building regulations. The air permeability at 50 Pa pressure differential (𝑞𝐸50)  has to be 7 or less, to fullfill the regulations.


Please notice that an official air tightness test is depended to some technical requirements. To achieve a clear and true test result, the test should be done in calm weather with almost equal outdoor and indoor temperatures.


Air Tightness Testing to create final test reports for inclusion in BER
Air Tightness Testing procedure