Air Tightness Testing

"Eliminating as much stress as possible"

"Guiding you through the building regulations journey"

"Saving you money on your build cost"

Are you a property developer, house builder, self-builder or planning a new development?

We’ll guide you through building regulations approval whilst eliminating as much stress as possible.

Enabling you to secure that all-important completion certificate… whilst saving you money on your build cost.

Ratio Seven are fully accredited SAP assessors and authorised airtightness testers with over 20 years house building experience.

Need an air test? We offer fast reliable coverage throughout the UK. Cheshire based company offering a friendly nationwide service

Over 10 years experience providing Part L, Part F and Part G SAP calculations and EPCs.

Are you spending too much on build costs? We’re specialists in reducing your overheads without compromising on the quality of materials.