insulating inside walls

bugsntinas

if we don't get repossess I'd like to insulate the inside of the exterior walls.most of them are already plasterboarded etc so with most I have bought extra therm insulationscrewed that to the walls and then screwed plasterboard over that but one wall is just plaster on the external wall.is it possible to "glue" insulation onto it and then "glue" plasterboard to that?

Sleeper12

You need to drill & then hammer in mushroom fixings. About 12 per 8x4 board

I wouldn't be too hopeful that the other boards won't crack, move or even come away from the wall if you only screwed into plasterboard. I might have picked you up wrong on that

bugsntinas

ok.might be easier said than done as it is an old stone cottage

Calahonda52

bugsntinas wrote: »

ok.might be easier said than done as it is an old stone cottage

Can you describe the exact wall construction in some detail for the old stone cottage as you might be creating a problem with this approach.

see here
https://www.google.ie/search?hl=en&as_q=&as_epq=stone+cottage&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=boards.ie&as_occt=any&safe=images&as_filetype=&as_rights=

TopTec

No problems with fixing thick insulated plasterboards (or slabs as they are called round here), to interior stone walls with metal (or plastic) mushroom fixings. My walls are a couple of hundred years old and I did mine 5 years ago and have had no problems at all. Never had damp or condensation, I just make sure there is plenty of ventilation.

If you drill through the board into the wall and the hole is loose move a few inches and try again. I think my worst one was 8 holes before I found a solid spot.

TT

Bonzo Delaney

Ideally if it's an old stone cottage and finding secure fixing a Metal stud is put up in front of the wall then insulate between the studs with rock wool or similar product put up a vapour barrier over the stud then slab & finish.
Have a look at this link for an idea

http://youtu.be/rcqDunjPoJM

bugsntinas

Calahonda52 wrote: »

Can you describe the exact wall construction in some detail for the old stone cottage as you might be creating a problem with this approach.

see here
https://www.google.ie/search?hl=en&as_q=&as_epq=stone+cottage&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=boards.ie&as_occt=any&safe=images&as_filetype=&as_rights=

all i can say is it is about 120 years old and the walls are about 1.5-2 foot thick.

Stoner

The SRT product I mentioned before will stick to the stone, then you can use pink foam to stick the insulated boards to the wall.
They say you can paint SRT onto glass and you can cement to the glass afterwards.
Johnson chemicals sell it I think they are on the naas road.

bugsntinas

Stoner wrote: »

The SRT product I mentioned before will stick to the stone, then you can use pink foam to stick the insulated boards to the wall.
They say you can paint SRT onto glass and you can cement to the glass afterwards.
Johnson chemicals sell it I think they are on the naas road.

what exactly is the srt stuff ans is the pink foam like expanding foam type stuff?

Stoner

The SRT is clear chemical, you paint it into dry clean surfaces as it drys into kind of clear plastic paint. If you look at it when dry it looks like a thin covering of plastic on the wall.

I've an old post on it relating to damp proofing if you want to search for it .

The pink foam, I don't know the official name, it's like expanding foam but does not really expand to the same degree.

I think lads call it salmon foam too. It's for sticking thermal board to walls without using mushroom fixings, you don't get the cold bridge, but more importantly you don't break the moisture layer on the wall you stuck it too.

Icaras

Op it is possible to glue the insulation to the wall and the plasterboard to the insulation but it all must be fixed in with screws too. This is to ensure if there is a fire and the glue melts the plasterboard doesn't come away from the wall which could cause mayhem in an emergency situation.

bugsntinas

Icaras wrote: »

Op it is possible to glue the insulation to the wall and the plasterboard to the insulation but it all must be fixed in with screws too. This is to ensure if there is a fire and the glue melts the plasterboard doesn't come away from the wall which could cause mayhem in an emergency situation.

cheers for that.i was thinking along the lines of some kind of builders adhesive.

STONER.cheers for that it makes sense now.

Calahonda52

https://www.nsai.ie/S-R-54-2014-Code-of-Practice.aspx

If the SRT is impermeable to moisture vapour then its the wrong answer when on the cold side of the insulation.
Bonzos approach reflects the correct approach as to where the vapour layer should be.
ps
Thanks for the thanks BD

Just today this stuff is important at the best of times but especially so in older walls,
so as they say
: must do better
when you read
all i can say is it is about 120 years old and the walls are about 1.5-2 foot thick..

There is a very close correlation between the detail provided by the OP and the quality of the "advice" and ideas that we can add