Air Tightness Testing for Energy Efficiency & Compliance

Air tightness testing sounds technical, but really it's just a way of checking how leaky your building is. We run a test, find out where the air's sneaking out, and show you what needs sorting.

Builders need it because Part L of the air tightness building regulations says you can't hand over a new build without proof. No pass, no sign-off. Simple as that.

Homeowners need it for a different reason. If your house isn't airtight, you'll feel it in draughts round your windows and in the heating bill that makes you wince every month.

Either way, fixing air leaks matters. It keeps energy where it belongs, makes homes cheaper to run, and gives you the paperwork you need to prove the job's been done right.

Air Tightness Testing for Builders

Builders, you're down to the wire on a new build. The floors are down, the decorators have packed up, your client is already arguing with their partner about curtain fabric.

Then some chap with a clipboard pipes up: "Where's the air tightness test certificate?"

And suddenly, the whole job grinds to a halt.

This isn't just a box-ticking exercise. Under Part L of the Building Regulations, an air tightness test is actually a legal requirement for new builds. Fail it and you'll risk costly delays, redesigns, and even refusal of your long awaited completion certificate.

It doesn't matter how lovely the place looks or how fast you've worked — if it's not compliant with air tightness building regulations, you're stuck.

Building Envelope Testing

It's not just new builds that benefit. Our building air tightness test also works for retrofits and existing homes.

By testing the full building envelope — walls, windows, doors and roofs — we pinpoint the weak spots where heat escapes.

• Energy Performance: We'll show you exactly where your building is losing energy and how to fix it.
• Lower Bills: Every leak sealed means less heat wasted and more money saved.
• Future-Proofing: As regulations tighten further, investing in airtightness now protects you from bigger costs down the line.

Why Choose AVT for Air Tightness Testing UK?

Whether you're a builder staring down the barrel of Part L sign-off, or a homeowner sick of watching money literally blow out the window, you need air tightness testing that actually solves the problem. That's where we come in.

• Certified Testing: Every air tightness test we carry out meets UKAS-accredited standards. No shortcuts, no "that'll do" jobs.
• Part L Compliance: Builders, we'll get you over the line with the latest air tightness building regulations, so your handover isn't delayed.
• Fast Turnaround: Homeowners don't want weeks of waiting to find out why the living room feels like the Arctic. Builders don't want a project grinding to a halt. Either way, results are quick.
• Clear Guidance: We won't just hand you a report and disappear. You'll get straightforward advice on what's leaking, what it means, and how to fix it.

Basically, we make life easier for both camps: warmer homes for families, smoother handovers for builders.