The Haringey PassivTerrace

winner of Retrofit for the Future

BC visit 14th October

with one comment

A colleague, Ian Ridley and I visited the site in the morning. Paul Archer was there. We delivered a box of meters to be installed (gas, water, electric, 2 heat meters). Also we were deciding on monitoring of relative humidity on the cold side of the insulation at several points.
The Gutex boards were mainly completely fitted, using mechanical fixings, something like a giant rawlplug. Lime plaster scratch coat was still soft a few days after plastering. Overall there is a  five week schedule from raw wall to insulated and plaster finished wall, compared to a 2 day schedule for drylining type insulation. Comment was, this was long but would be ok for a build of several houses, but for a single one meant delays.
The concrete floor has been poured and set ready for Jablite insulation. Seeing the thickness of this gives a clear feel for how much the volume of this house will be reduced by the insulation.
Cable ducts will be installed within the plaster for monitoring equipment.
One party wall by the stairs will not be insulated and could be a cold wall if there is an unfilled cavity. Infra Red camera could be used to check this next week.

I took two videos, one of the gutex and lime plaster the other of how one piece of the ceiling will be insulated.  Click here

and here

Some photos below

Jablite 150mm thick for rear, and 3oomm for front part of house. Thermafleece, 100mm thick


Written by Ben Croxford

October 15, 2010 at 4:47 pm

Posted in Uncategorized

One Response

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  1. The party wall is a solid 215mm brick wall, plastered both sides – not cavity.
    Dry-lining insulation has issues with thermal bypass – using plaster to fix the woodfibre boards means no air gaps are left at the rear of the boards between the wall, and with old houses, the walls are never usually plumb, so the plaster to fix the boards also takes up this tolerance.

    The lime plaster does have a longer drying out time than gyspum, and needs to be programmed into the build to allow adequate drying out time – choice of lime rather than gypsum plaster for it’s breathability to deal with moisture within the old building & brickwork.


    October 18, 2010 at 9:16 am

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