TP Wiki

We help builders across the UK with airtightness testing because getting it right first time saves stress, time and money. When air leaks out of a new build, it drives up heating bills, creates draughts and can lead to failed tests that delay handover. That’s why we plan early, walk the site with builders before the walls go up and offer advice to spot problems while they’re easy to fix. Testing only takes about an hour, and we’ll show you where leaks are if needed. We’ve done thousands of tests, and the ones that pass first time usually started with good prep.

Air tightness testing checks how much air leaks through gaps or cracks in your building that should be sealed. We use special equipment to spot where warm air escapes or cold air sneaks in, which can lead to higher energy bills and discomfort inside. Most new builds in the UK need this test to meet Part L of the Building Regulations. If you’re building or renovating, we help you get ready, carry out the test and pinpoint any problems early. At Ratio Seven, we make the whole process clear and simple, giving you quick, reliable results wherever you are in the UK.

SAP air tightness certification checks how well a home keeps warm air in and stops draughts getting through gaps and cracks. We test this by using a fan to push or pull air through the building and measure how much escapes. If too much leaks out, your house will be harder to heat and cost more to run. We help builders and homeowners across the UK get their homes ready to pass this test, offering advice along the way. Once it passes, you get a certificate which is part of what’s needed to meet building rules and get an Energy Performance Certificate.