TP Wiki

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.

We test how much air leaks in or out of a building when it’s meant to be sealed up tight. This matters because if too much air escapes, your heating or cooling has to work harder, meaning higher bills and more stress down the line. At Ratio Seven, we help builders, developers and homeowners across the UK check their buildings meet the rules set out in Building Regulations Part L. We make the process simple by finding hidden gaps and explaining everything clearly, so you can fix small problems early and avoid costly delays later. Ready to book or ask questions? We’re here to help.