Dwellings / Domestic Buildings
Commercial / Non-Domestic Buildings
Around downlights and other ceiling fixtures; Around loft hatches and other accessible roof storage or voids; Around the frames of external doors and windows; Junction bewteeen walls/partitions and ceiling/roof.
A high precision fan is set up on one of the external doors - either the front, rear or side doors depending on the building.
As air permeability tests are focused on un-controlled ventilation, all extracts are sealed using low tack masking tapes i.e. extractors and vents in kitchens, bathrooms, toilets, utility rooms etc.
After calculating the areas of the external walls, roof and floor, and taking some background temperature and pressure readings, the high precision fan is started and used to extract air from the building. This creates a pressure differential which is essentially depressurisation. The pressure differential is measured using the tubes connected to the presssure reading equipment in the image.
After taking several sets of pressure readings and inputting in the specialist air testing software, the sofware generates the results. If a pass is achieved, the test results will be lodged with our accreditation body (iATS) and the test certificate made available to you the next working day.
If the building is failing the test, we will identify the leakage areas to enable you make remedial actions. For most minor remedial actions that can be made within a short time, we will wait for them to be done and re-test immediately. For major remedial actions, we will have go come back on a different day to re-test.
To help achieve a pass, please do review some of the main leakage areas in the photos above.