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Wakefield - Air Testing - 01924 578 029
When Should The Test Take Place?
For obvious reasons, an air pressure test is generally one of the last surveys to be undertaken once all the walls, windows, doors etc. are complete and sealed to stop any air escaping and prevent drafts through the property. The building envelope will also need to be completed.
Do I Need An Air Leakage Test?
Part L of the Government building regulations explains that on a large plot of new houses that are built to a similar specification, only a sample of the houses will need to be air tested.
All new buildings in England and Wales have had a mandatory requirement since 2006 (2010 in Scotland) that domestic and commercial buildings, over a certain size, must have a passing air leakage certificate before the property can be sold.
Planning your test in advance will help our experience air assessment team covering Wakefield to determine how many tests you'll need ahead of time per property and will be happy to offer advice on the best ways to gain your air permeability rating.
What Does An Air Leakage Test Involve?
There should be no outside access once the test has begun for approximately 90 minutes so plan accordingly. Workers can still do their job inside the property, within reason, though may feel some discomfort due to the noise of the fan and the draught that will be felt throughout the building.
An air test involves placing a large fan, or several fans, to an opening within the property; usually a doorway. The fans will increase and decrease in speed that will in-turn change the building's air pressure and record the results. Please note: an air test cannot be carried out if wind speed is more than 13mph. 3 metres per second is the ideal wind speed when undertaking an air test in Wakefield.
Whilst the air tightness test is being undertaken, furniture will not be affected but smaller items such as paper must be held down or removed completely so they're not blown about. The pressure of the room will be tested and as such all windows and doors that lead outside must be securely closed to avoid them swinging open and the test being abandoned. Similarly, all internal doors should be wedged open to avoid being slammed shut.
How Many Properties Need An Air Tightness Test?
If you have 4 or less properties of the same type then only one test needs to be undertaken per type. If you have more than 4 but less than 40 dwellings of a type then you need at least two tests to be done on each type. Finally, if there are more than 40 properties of a particular type then at least 5% of each type needs to be tested UNLESS the first 5 get a passing score - then this can be dropped to just 2%.
What Air Permeability Rating Do I Need?
A passing score in Wakefield is 10 m³/(h.m²) for an air permeability rating which resembles the amount of uncontrolled air that's leaking from the dwelling. Should the test fail, our air tightness team will help you identify where the leakages are happening in the hope that a passing score will be achieved after a re-test.
For further Air Testing information for your area, be sure to check out Air-Testing-Wakefield.co.uk.
Our other services include:
Sustainability Statements, Part G - Water Calculations, Thermography, Acoustic Testing, Part F Ventilation Testing, SAP Extension Calculations, Part E, Energy Statements, On Construction EPC, SAP Calculations (TER/DER), Code 4 Sustainable Homes, SAP Conversion Calculations, Environmental Noise,
Air Testing can also be known as:
Domestic Fan Pressure Testing, Fan Pressure Testing, Domestic House Leakage Testing, Domestic Air Testing, Air Integrity Testing, Air Leakage Testing, House Leakage Testing, Air Pressure Testing, Domestic Air Tightness Testing, Domestic Air Leakage Testing, Air Tightness Testing, Domestic Air Integrity Testing, Domestic Air Pressure Testing,
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