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Partial dry-lining during remedial works

heavydawson · 2014-05-07 21:56:30

Long story short, new build and our roof was not properly fixed to our walls and we're having remedial work done based on structural engineers report. The house construction is 150mm full-fill cavity, airtightness certified to 1.4 ac/h, and 360mm loft roll on the flat in the attic The remedial work involves chasing the…

07-05-2014 9:56pm

#1

heavydawson

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Posts: 1175

Long story short, new build and our roof was not properly fixed to our walls and we're having remedial work done based on structural engineers report.

The house construction is 150mm full-fill cavity, airtightness certified to 1.4 ac/h, and 360mm loft roll on the flat in the attic
The remedial work involves chasing the plaster in all the upstairs rooms at 1.5m intervals, and adding straps. Because the plaster is already cracked from the structural issues, we've been advised to put plasterboard over the existing sand and cement finish when the chasing and strapping is complete, as no amount of patching the sand and cement will get it back to normal.

Each of the upstairs bedrooms has two external walls, one with windows and one without. I was considering adding insulated plasterboard to the wall without windows as the windowboard depth on the other wall makes it a non-runner.

All of the internal walls are concrete as well, so I would have guess that losing the thermal mass of one of the four walls wouldn't be significant. Just curious to know if dry-lining one of the external walls in each room was worth it and if the difference in temperature between the dry-lined external wall, and the other external wall might cause dew point issues in the corner of the room where they meet, even where the cavity has 150mm of insulation throughout.

The walls I'm talking about have significant scope for dry-lining thickness (could comfortably take up to 4" of insulated plasterboard).

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