AIR TIGHTNESS TESTING

BUILDNG REGULATIONS | PASSIVHAUS

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Air Tightness Testing 

Air tightness testing is a requirement of UK Building Regulations Part L. It measures the level of uncontrolled air leakage through the building fabric.

Fully accredited and highly experienced
On-site results and same day certification

We offer free advice throughout the build to all of our clients and if there are problems with achieving your target on the day we have the experience and knowledge to identify air leakage paths and, where possible, get them fixed there and then to avoid costly retests. 

We offer free advice throughout the build to all of our clients and if there are problems with achieving your target on the day we have the experience and knowledge to identify air leakage paths and, where possible, get them fixed there and then to avoid costly retests. 

Flexible test appointments

We know that it doesn't suit everyone to have an air test Monday-Friday 9am-5pm, especially when social distancing has to be taken into account on site. If you require testing outwith these hours then just let us know and we will book you in at a time to suit you. 

Free Leakage Paths Guide

Read through our free guide to leakage paths which will be sent to you when you book. The guide shows real life examples of the best and worst of what we've found on site allowing you to ensure you'rebuilding airtight throughout as well as giving you a refresher in areas to double check before we arrive on your test day. 

Passivhaus Testing

Air tightness testing for Passivhaus dwellings varies from UK Building Regulations in three ways:

 

  • Two tests are required at completion - one in a depressurised state and one in a pressurised state.

  • The result is measured in Air Changes per Hour (ACH) and is based on the volume of the building and not the envelope area that is used in determining Building Regulations air leakage.

  • ​The target is much tighter - 0.6ACH. This isn't directly comparable to Building Regulations due to the volume vs envelope area difference, however in a typical house it is generally a similar figure so over 10 times more airtight than Building Regulations Part L states.

We strongly advise carrying out testing at various stages of the build due to the stringent targets of a Passivhaus building:

      Stage 1:  Once the air barrier sealing works are completed

      Stage 2:  Once the secondary fix works are completed

      Stage 3:  At completion

Certification | Air Tightness | Thermal Imaging

01922 235 365 |  info@rjenergy.co.uk  | 07533 310 217