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BTS Reacts to PAS 2035 Release

On the 30th June 2019, the British Standards Institute (BSI) released the long awaited PAS 2035; the new framework for retrofitting dwellings for improved energy efficiency. This new standard is supported by the UK Government’s Department for Business, Energy and Industrial Strategy (BEIS), and was developed by a Steering Group which included many stakeholders from the Built Environment and Retrofit industry.

Build Test Solutions was one such organisation involved in the preparation of this new PAS document; contributing some of their own technical insight to help build a new standard for the future.

Initially set to underpin Government-backed retrofit schemes carried out in the UK, the standard adopts a risk based approach to retrofit assessment, design, measurement, verification as well as the provision of handover advice:

“PAS 2035 combined with PAS 2030 (which concerns installation, testing commissioning and handover) stands to serve as a real game changer in the way that retrofits are designed and assessed.

As strong advocates of building performance measurement and post occupancy evaluation, BTS were eager to see that air permeability testing, heat loss measurement and ventilation system assessment were all part of the retrofit design and commissioning process. Measurement of performance pre works can ensure that the most appropriate solutions are designed and installed whilst post works measurement will ensure that intended quality outcomes have been delivered.

Our own Pulse air permeability measurement device, leak checker fan, Smart HTC and rapid U-value meters have all been developed for quick and easy use within a Retrofit projects” .

What is PAS 2035?

PAS 2035 has been introduced to address the substantial level of failure present within existing domestic retrofit. It began life within the Each Home Counts review (commissioned back in 2015), which highlighted the poor practice and lack of effective regulation which was damaging the retrofit industry. PAS 2035 provides a holistic approach to retrofit in domestic buildings; considering the building as a system of elements, interfaces and occupants that interact, rather than completely elements which are completely separate.

Further information about PAS 2035 is available here.


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