Air Tightness Testing in London, Essex, Hertfordshire & Cambridge

Same-week appointments available

Accredited and insured assessor

Domestic EPCs, SAP, retrofit support and energy advice

Air Tightness Testing
What Is Air Tightness Testing?

Measuring uncontrolled air leakage

Air tightness testing measures how much air escapes from a building through gaps, joints, and unintended openings. The test identifies air leakage that can affect energy efficiency, comfort, and compliance with building regulations.

It is a key requirement for many new builds, extensions, and refurbishments, and plays an important role in reducing heat loss and improving overall building performance.

Air Tightness Testing Why Is Air Tightness Testing Required?

Building Regulations and Performance

Air tightness testing is typically required:

  • For new build dwellings
  • For certain extensions and conversions
  • To meet Part L building regulations
  • As part of SAP or SBEM compliance

Testing may also be requested by building control to demonstrate compliance before sign-off.

Ready To Get Started?

Book Your Air Tightness Test Today

If you need Air Tightness Testing to meet Building Regulations or support your SAP submission, get in touch today. We offer straightforward bookings and professional testing across London, Essex, Hertfordshire and Cambridge.

Air Tightness Testing
Why Air Tightness Matters

Efficiency, comfort, and compliance

Excessive air leakage can lead to higher heating costs, cold draughts, and poor building performance. Air tightness testing helps:

  • Reduce heat loss and energy use
  • Improve internal comfort
  • Support EPC, SAP, and SBEM results
  • Demonstrate compliance with current regulations

It is increasingly important as energy efficiency standards continue to tighten.

Air Tightness Testing
Air Tightness Testing Across London, Essex, Hertfordshire & Cambridge

Reliable Testing, Clear Results

Whether you’re completing a new build in London, finishing a development in Essex, or signing off a project in Hertfordshire or Cambridge, professional Air Tightness Testing is essential for compliance and performance.

We provide reliable testing, fast turnaround and clear documentation to keep your project moving.

Get In Touch Today!

Need an EPC or support with your another one of our services? Send a quick message and we’ll come back with price, availability, and what we need from you.

To get an accurate quote, include: postcode, property type (flat/house), bedrooms, and what you need (sale, rental, upgrade planning).

07367 395 385

info@callummartinenergy.com

Service Of Interest
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6 days ago
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Commercial EPC! Excellent service from Callum Martin Energy for a Commercial EPC. The whole process was professional, efficient, and straightforward from start to finish. Callum was extremely knowledgeable, explained everything clearly, and completed the assessment promptly with minimal disruption. The price was very competitive, and the level of service was excellent. I’d definitely recommend Callum Martin Energy to anyone needing a Commercial EPC. Professional, reliable, knowledgeable, and great value for money.
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6 days ago
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Amazing! ⭐⭐⭐⭐⭐ I had a fantastic experience with Callum Martin Energy. They were extremely knowledgeable, professional, and helpful throughout the whole process. Everything was explained clearly, and the quality of service was excellent. Their pricing was also very competitive, offering great value without compromising on quality. Having compared them with other companies, Callum Martin Energy really stood out from the competition for their expertise, professionalism, and customer service.
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59 days ago
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Highly recommend Callum Martin Energy was great from start to finish! Couldn't recommend enough!
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132 days ago
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Professional, well priced and excellent service Really good experience recently with Callum Martin Energy. Callum handled the whole EPC process smoothly and professionally, and everything was done faster than I expected. Communication was clear throughout and very reasonably priced. Would definitely employ again if needed!
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137 days ago
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Great job Quick, friendly and efficient. Perfect service.
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160 days ago
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Brilliant Service!! Brilliant service by Callum who kindly managed to fit me in for an urgent EPC at less than 24 hours notice for a remortgage application. Extremely knowledgeable, professional and courteous, I couldn’t recommend Callum highly enough.
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255 days ago
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Excellent service — highly recommend Very smooth and hassle-free EPC completion. Callum was professional, punctual, and explained everything clearly. The report was completed quickly and communication was excellent throughout. I’d definitely recommend their services.
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256 days ago
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Fast and reliable EPC Fast response and managed a quick turnaround on our EPC. Arrived on time and friendly to deal with. Would certainly recommend Callum to others!
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262 days ago
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Professional and Reliable EPC Service Callum from Callum Martin Energy carried out the EPC assessment for our property and provided an excellent service. He arrived on time, was friendly and very polite, and completed the work efficiently and professionally. The process was smooth and well organised from start to finish. I was very pleased with the service and would happily recommend him to others.
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267 days ago
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10/10 Callum Martin Energy has done many EPC’s for us. 10/10 every time!