Cumberworth radical retrofit

Cumberworth radical retrofit

Whole house ‘deep retrofit’ for a hard to treat home, using new internal wall insulation (IWI) techniques to reduce risk of ‘interstitial condensation’.

  • Radical ‘fabric first’ retrofit
  • Improving the comfort levels and reduce the heating bills at a cold and ‘hard to heat’ home in Cumberworth,  West Yorkshire.
  • Whole house strategy, designed using Passivhaus Planning Package
  • Innovative solutions used to minimise moisture risk with internal wall insulation (IWI)


Radical retrofit project to help improve the comfort levels and reduce the heating  bills at a cold and hard to heat  home  in Cumberworth,  West Yorkshire. A whole house ‘fabric first’ strategy was employed, based on Passivhaus principles and designed using PHPP (Passive House Planning Package), aiming to reduce the heating need of the house by an estimated 86%.




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RISE Heritage Award for Restoration & Retrofit

RISE Awards 2016 Highly CommendedHIGHLY COMMENDED for ‘Cumberworth radical ‘whole house’ retrofit

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Constructing Excellence Yorkshire & Humber Awards 2017


SHORTLISTED for both the Sustainability and Preservation & Rejuvenation Awards

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Register here for a free technical briefing following all stages of the construction of the Cumberworth radical retrofit. The technical briefing is available as a 25 page pdf file, which will be emailed to you shortly.

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During Construction


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