We test homes and commercial buildings across Manchester and the North West, help you prepare the building beforehand, and if a test fails we find the leaks with smoke diagnostics so you can fix and retest the same day where possible.
When you'll need it
- Every new dwelling before completion
- Commercial buildings over the size threshold
- Change of use projects creating new homes
- Mid-build tests to catch problems early
What's included
- Pre-test checklist so the building is ready
- Calibrated blower door test to current standards
- Air permeability certificate for Building Control
- Results passed straight into your as-built SAP
- Smoke diagnostics to locate leaks if needed
- Same-day retest where practical
Air tightness testing FAQs
Does every new home need an air test?
Yes. Part L 2021 requires every new dwelling to be tested, rather than a sample on larger sites as before.
How should I prepare for an air test?
Close windows and external doors, fill traps with water, seal any temporary openings and finish the airtightness details. We send a checklist before every booking.
What happens if the test fails?
We use smoke diagnostics to show where air is getting in, so you can seal it and retest, often on the same visit.
