Everywhere.

Testing should take place when the build is complete. We always try to provide a test date within a week of you getting in touch, although we can often juggle the diary to fit in urgent tests if required.

Anything to do with ventilation should be closed or sealed such as extract vents, extract fans, window trickle vents, air conditioning ducts and chimneys. All sanitary ware traps, such as toilets, basins and baths must contain water to make sure a seal is made between the internal building and the sewerage system.

Essentially, we attach a large fan to the front or back door of your building, and blow large amounts of air into the building. Using specially calibrated equipment to measure pressure, temperature and air flow, we can calculate the leakage of air from the building. We measure the amount of air we need to blow into the building to maintain a constant pressure; this is equal to the amount of air that is leaking out of the building. You can be in the building when a test takes place and can feel any areas that are draughty – always handy to have a mastic gun handy!

We are typically onsite for approximately one hour per plot. We always try to leave time in case minor remedial works are necessary to them put the fan on again for a retest should it be required.