Conversions - General Question

Moving plasterboard

Hey thanks for your answer :-)

Yes its the plaster board that is moving. the stone walls are solid. I have now been told that if there is a gap between the plaster board and the insulation that i don't need worry about a vapour barrier (phew!!) I only hope there is a gap between the insulation and the stone walls! There was no damp before as far as i know, but there was no insulation in the walls before.

I also read that i need a gap between the insulation and the roof tiles. But i don't have any as the plaster board is fixed to the roof ridge. there is insulation on the sides. (The ceiling go right up to ridge and the top pearlings). My roof has no felt just slate tiles. Should i go to the expense of a new roof??

Sorry but Im a confused woman (just learning all this!)

3 Answers

Thats great news that the wall is ok Phew!!!
Glad i could help:)

Im sure you dont need to go as far as having a new roof! If it is advisable to have a gap then maybe it would be more cost affective to drop the boards and add extra depth to the internal roof rafters/joists then re-board.

Im sure a general builder or carpenter will give you more advice on this.

Good Luck.
Scott Cannon.

Answered 27th Jun 2011

Cannon Preservation Ltd

Member since 21 May 2011

There are a lot of questions beaing asked all at once!!
Your roof will have to conform with Building Regulationd and although you may not need to re roof the outside as long as the slates are good and not leaking.
The inside should have a vapour membrain and at least 50mm minimum of insulation(a quilted version can be used 10mm composit).
the plaster board should be foiled backed and there should be a gap between all the layers to allow free air flof, this will elimaniate the possible condensation problems.
if you need any further help just ask.
regards Ashley

Answered 27th Jun 2011


Member since 3 Mar 2009

Hi , are you getting any staining on your ceiling boards from rain
If not then you don't need a new roof just yet . The space should be
approx half the rafter thickness if insulation board has been fitted
between rafters this eliminates condensation build up . You should
be able to view this by removing a few roof slates .
The moving Walls - I can only assume you mean they give a little
bit when you push on them , if so the framework they are fixed to
Is not correct , ie wrong stud spacing for plasterboard thickness ,
plasterboard should really be 12 mm silver backed (duplex) . If on
the other hand the board is moving and is directly fixed to wall (dot
and dab ) then chances are you do have a damp problem although
this usually shows with patchy staining .
Hope that helps :-)

Answered 27th Jun 2011


Member since 25 Nov 2009

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