Victorian mansion block, Bristol. Zero moisture failures at 36 months.
Red-brick Victorian mansion block, Bristol, the street frontage of the twelve flats.
Twelve flats, every external wall
A Victorian mansion block in Bristol: twelve units, solid walls, lined internally. The worry with internal insulation on a building like this is moisture trapped in the wall, interstitial condensation, and fabric that starts to decay out of sight.
That is why sensors were left in the walls and why the job was reviewed three years later.
What we did, in plain English
Every external wall of the twelve flats was lined internally with a breathable mineral system. Hygrothermal monitoring was installed throughout so the walls could be watched after the builders left.
The system
PerliScratch
PerliTherm
AeroBond
AeroGel
PerliFinish
What it was like having us in
The homepage does not describe the programme on this block: how long each flat took, whether residents stayed, or how the monitoring was fitted. A typical Victorian or Georgian internal wall insulation takes 2 to 5 days per room, or 1 to 3 weeks for a whole house, depending on scope.
Thirty-six months on
Zero moisture failures recorded at the 36-month post-completion review. Bills down 71%. U-value 0.19.
Struggling for many years with a continually damp wall in barn conversion with no damp course... BreatheTherm ‘does what it says on the tin’. It allows the moisture in the wall to pass through and wick – result has been a dry wall throughout recent downpours.
Christopher's quote is from a barn conversion in Bristol, not from a resident of this mansion block.