Air Tightness Assessors Ltd

Air Tightness Assessors Ltd is a family-run specialist established in 2006, providing reliable, professional air tightness testing supported by full ATTMA registration and UKAS-calibrated equipment. We offer flexible appointments, including evenings and weekends, to keep projects on schedule across Leigh-On-Sea, Chelmsford, Colchester and Southend-on-Sea. Our team supports developers, builders and homeowners with precise extractor fan installation and testing and air leakage solutions to boost energy efficiency and ensure full regulatory compliance.

We offer professional performance testing of extractor fans to ensure effective ventilation, compliance and long-term reliability. We also provide targeted identification of air leakage pathways with practical, efficient solutions to improve energy performance and meet regulations. We perform accurate air pressure assessments using calibrated equipment to confirm building compliance and optimise overall energy efficiency.

With 20 years of experience, we bring a wealth of knowledge to every project. We are ATTMA registered professionals, offering accurate and reliable testing. We provide flexible scheduling with evening and weekend appointments to suit your timetable.

Our comprehensive services cover everything from air leakage testing to extractor fan compliance. We are proud to serve Essex, Chelmsford, Colchester, Southend-on-Sea, and Basildon.