Will it rain inside my house?

As you probably know by now our house will be more or less airtight with ventilation provided by a MVHR (mechanical ventilation and heat recovery) system. Essentially this pumps in air from outside and chucks out the stale, stinky air once it has had the heat removed.

So far so good, but if it’s raining outside, won’t it suck nasty damp air into the house and make everything wet?

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The Crack in My Wall

More structural and conservation work this week tackling the challenges of restoring old stone buildings. The problem of the month has been the keenness of our old stone walls to part company with each other – a separation that started to accelerate once the structural support offered by a budlia and some nettles were removed. As mentioned previously, propping was the temporary solution but clearly something more long term was required.

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Balancing Act

One of the key requirements of a PassivHaus or in our case something built to the EnerPHit standard, is air tightness. To achieve the thermal efficiency required, we need to be obsessive about cutting out any air leakage and with it our precious heat. Once you’ve sealed your house up and made it air tight you then need a plan to prevent the air going stale, oh and for making sure the occupants can still breathe.

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The big book of words

The house project rollercoaster continues with great leaps of progress in some areas (design) while elsewhere we appear at times to be no further forward (amendments to our planning permission). Lockdown 2.0 has at least given us some enforced ‘stay at home’ time which we have put to good use reviewing the huge amounts of detail that is being produced and assembled by the team.

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Starting at the bottom

One of the many things we have to work out is how to insulate the ground floor. The Architects Matt and Elly, are helping unpick the mysteries of what you usually take for granted since it’s buried in the ground.  It’s all a balance between making sure the building doesn’t sink, cost, achieving un-interrupted insulation, minimal thermal bridges, and it turns out dealing with radioactive gas. 

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