How quickly can you test a plot in Stockport?

Most Stockport bookings are tested within 3 working days; the ATTMA certificate is issued within 24 hours of a passing test.

What is the Part L target?

8 m³/(h·m²) at 50Pa is the absolute legal limit; SAP often demands 5 or lower for Stockport new-builds.

Do you test single plots in Stockport?

Yes — single plots and full developments across Stockport. Volume rates available for sites of 5+ plots.

Can I retest if a Stockport plot fails?

Yes — failed plots can be retested at a discounted rate after remedial works.

What's the Part L target?

8 m³/(h·m²) at 50Pa is the absolute legal limit; SAP often demands 5 or lower.

Can I retest if I fail?

Yes — we provide a remedial report and a discounted retest.

Air Tightness Testing Stockport From £250

What is air tightness testing in Stockport?

Air tightness testing — also called air permeability testing — measures uncontrolled air leakage through the envelope of a new dwelling. A blower door fan pressurises the building and the leakage rate is calculated in m³/(h·m²) at 50Pa. The result is mandatory under Part L of the Building Regulations and feeds directly into the SAP calculation. Stockport has seen significant new-build activity, particularly across Victorian terraces in Reddish and Edgeley, so our UKAS-traceable testers cover Stockport sites with rapid mobilisation.

Who needs air tightness testing in Stockport?

Air tightness testing is mandatory for new dwellings in Stockport under Part L. Typical bookings include:

New-build developers across Stockport (every plot)
Self-builders pre-completion in town centre, Cheadle, Bramhall, Hazel Grove, Marple, Heaton Moor and Reddish
Passivhaus and EnerPHit projects in Stockport
Commercial premises sub-500m² in SK1–SK8

What's included

Blower door fan and pressure rig set-up
Pressurisation and depressurisation test
Leakage rate calculation in m³/(h·m²) at 50Pa
Smoke pencil leak detection
ATTMA Lodged certificate within 24 hours

How much does air tightness testing cost in Stockport?

Air tightness testing in Stockport starts at £250 per plot. Volume rates apply for sites of 5+ plots — common on Stockport new-build developments. Failed tests can be retested at a discounted rate, accompanied by a remedial report identifying the leakage paths.

How fast can you test in Stockport?

Most Stockport sites are tested within 3 working days of booking. Each plot takes 1–2 hours once the building is sealed and ready. The ATTMA Lodged certificate is issued within 24 hours of a passing test.

Stockport sites we cover

We test new-build sites across every Stockport postcode — SK1, SK2, SK3, SK4, SK5, SK6, SK7 and SK8 — and the wider Greater Manchester area (Manchester, Tameside, Trafford, Oldham).