14/11/2017 Air Tightness

We endeavour to design and detail buildings with a high level of airtightness. Having an airtight house means that its thermal performance is much more efficient with the warm air being unable to escape through the building fabric. It’s still very important to consider the airtightness of a building even if it has been very well insulated; the warm air will inevitably find it’s way out and you’ll have to pump the building with more heat to keep the ambient temperature stable.

We’re reaching the end of a barn conversion build at the moment and it was recently pressure tested to assess the level of air changes, or in laymans terms, how much air is leaking out of the building. The level achieved was an incredible 0.9 air changes/hour@n50, which surpasses not only the Building Regs target of 10 air changes/hour but also the Passivhaus retrofit target of 1.0 air changes/hour@n50.

This is an amazing result for a leaky old stone barn and has been achieved through careful and considered technical airtightness detailing, with diligent workmanship and attention to detail on site.

  • 07/07/2021Planning Permission We’ve received planning permission for a house in a small village on a considerable sized plot and amazing views across a valley. As we find with many buildings the thermal efficiency of the existing fabric is poor and the cellular
  • 15/06/2021Windows The windows are going in to our new studio building which is a very exciting day. These huge, high performance, triple glazed windows are made by Internorm and will contribute to the airtightness of the building. Adopting a fabric first
  • 28/04/2021Building the Dream The next series of Building the Dream is back on our screens from tonight, Wednesday 28th April, 9pm, More4.
  • 12/04/2021Steel framed barn conversion We are working with a client to convert a steel framed barn in to a home fit for a growing family. The barn had achieved a class Q planning permission but the client wanted to refine the plans to be
  • 29/03/2021Grand Designs Our Cornish project is in April’s edition of Grand Designs magazine, in a feature about the driveway. Charlie is quoted in the opening paragraph as saying, “The journey from the driveway to front door to entrance hall is an important
  • 13/03/2021Timber Frame We have been working with Steico, specialists in wood fibre insulation and timber joists, to create giant timber frame ‘kits’ where every length of wood is pre-cut and numbered off-site ready to be assembled quickly and efficiently on site. This
  • 09/03/2021Work on site Still shrouded in scaffolding, the flat roof of this new home in Gloucestershire is taking shape. The roof will be sewn with wild-flowers which will be a haven for wildlife but also a disguise for the the solar panels. The
  • 21/02/2021Rotunda House A few years ago we were invited to pitch an idea for a new home for Prue Leith and John Playfair. Luckily for us they loved our contemporary re-imagining of the English country house. The house features a prominent ‘Piano
  • 03/02/2021New studio on site Having received planning permission, work on our new studio has started on site. We are converting a steel framed barn into a Passiv-standard studio space which we hope to complete towards the autumn of this year. The conversion will reuse
  • 18/01/2021Small but perfectly formed We are working on breathing new life in to this modest field barn. Intended as an annex for overflow accommodation, our scheme will create extra space through a lower ground floor extension sensitively designed to retain the original character of
|