Insulating/boarding a stone wall questions.

[SparrowHawk99]

I've bought some plasterboard with polystryene attached and was going to bond it to a basement stone wall using a bonding foam http://www.screwfix.com/p/soudal-expanding-sticky-foam-750ml/50519

Was just wondering if this will work and whether I'll need to clean the wall before applying the board?

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• SparrowHawk99
• 2 Feb 2014
• 1

 

[catlad]

You need to spray the wall first with water not too much though a plant sprayer does the job ok.

 

[SparrowHawk99]

Can I throw some on the wall with my fingers?

 

[SparrowHawk99]

Just for the record this hasn't worked out very well. The storm down here is mental and I started by placing the board onto the fireplace wall, so the board was being blown off the wall which worried me. It also gave me a sense of how limited the contact is with the adhesive, I'm just not confident
a random sheet might one day pop off the wall so going to have the wall sand/cemented instead

 

[captainpp]

I've always been very dubious about using foam to stick plasterboard (or insulated board) to walls. Boards are heavy!

You could batten and screw the boards to that. I've done that a lot here, to stone walls that are in worse shape (so harder to get fixings into).

 

[carpentrycardiff]

I've bought some plasterboard with polystryene attached and was going to bond it to a basement stone wall using a bonding foam http://www.screwfix.com/p/soudal-expanding-sticky-foam-750ml/50519

Was just wondering if this will work and whether I'll need to clean the wall before applying the board?

Untitled

• SparrowHawk99
• 2 Feb 2014
• 1

I wouldn't use foam for this job because stone is uneven and often crumbly and dusty.

The method i use is : measure and mark out 400 centres from one wall and screw a 2"x1" batten down each end, leaving the screw heads just enough under the surface of the timber so i can drive the screw in and out to plumb and straiten the batten. then i pack each screw tighten against the wall then spray expanding foam in the gaps in the batten.
when both end battens are up and plumb both ways i screw the rest of the battens to the wall on their centres and use a strait edge horizontally off the two end battens to straiten up the middle battens then pack and foam.