Posted by on Oct 18, 2012 in Projects | Comments Off on Barbrook


Our role

Passivhaus consultancy – Refurbishment

Mechanical services design


The project:

Refurbishment of two semi-detached social housing cottages in North Devon, completed 2011, renovated to almost EnerPHit standard


Our focus:

At first glance these houses look perfect for a cost-effective retrofit: the external walls are only 100mm thick and are made of heavily reinforced concrete.  This means there is no cavity to worry about, and the thickness of the external insulation is not such a big issue.  As with all retrofits life is never that simple; our big mistake was assuming the concrete would be relatively airtight.  The final airtest results came in just under 1.2 air changes/hour, and a large chunk of that was through the party walls.

We designed the mechanical services which comprised of a central biomass boiler for the two dwellings and individual MVHR’s.


Read more on Energy Action Devon’s blog  


The team:

Client:North Devon Homes

Architect:Clive Jones

Contractor: RR Richardson