Insulation Board called...????

castle96

I have a very cold front of house. Single brick. I want to insulate inside. There is a board called C........ ? with foam on one side and plasterboard on the other. What is it called ?

I have paper on top of plaster on top of brick. Can I fix the board by scraping paper off (at fixing points), and using 'dab it' as with plasterboard. Will this adhethe foam to the plaster ?

Thickness of board ? (various available I assume).

Do I need a plastic membrane between plaster and foam (in which case I can't use dab it !

Info please - mucho thanks

brightontraveller

castle96 wrote: »

I have a very cold front of house. Single brick. I want to insulate inside. There is a board called C........ ? with foam on one side and plasterboard on the other. What is it called ?

I have paper on top of plaster on top of brick. Can I fix the board by scraping paper off (at fixing points), and using 'dab it' as with plasterboard. Will this adhethe foam to the plaster ?

Thickness of board ? (various available I assume).

Do I need a plastic membrane between plaster and foam (in which case I can't use dab it !

Info please - mucho thanks

Insulated Thermal Plasterboard only I can think of is with c is the Celotex GD5000 etc various types makes though personally not keen on dot and dab on cold wall myself for fixing check manufactures literature for recommended fixing

http://www.building-supplies-online.co.uk/building-materials/plasterboard-plaster/plasterboard/insulated-thermal-plasterboard.html

arbrighton

Think the insulated plasterboard on our cold external wall was screwed onto battens during renovation work as the dab wouldn't stick to the existing surface

castle96

battens would add a lot of depth. Was hoping to use dab it, or no nails ?
Would either stick polystyrene to plaster ? (seems not from what you have said

Terry98

Although this is from America it might help

https://www.youtube.com/watch?v=zDNyjR1SHUQ

Furts

castle96 wrote: »

battens would add a lot of depth. Was hoping to use dab it, or no nails ?

To be effective the boards would have to have a minimum insulation thickness of 25mm, but for improved insulation, and to justify the labour time, I would be looking at 50mm insulation. This is adding a considerable thickness to your walls.

jackyann

Although expensive, I would look at Fermacell. It is very reliable, and comes with it's own "skim" that you can put on and save the cost of a plasterer.

arbrighton

castle96 wrote: »

battens would add a lot of depth. Was hoping to use dab it, or no nails ?
Would either stick polystyrene to plaster ? (seems not from what you have said

yes, it did, but there really wasn't any other option in that room. OH lost about 40 mm from the 'manroom'

ceredigion

Talk about the blind lending the blind!
The product is called Gyproc ThermaLine (British Gypsum)(knauf make there own range.) It comes in many grades and thicknesses as a general rule go for the better board and the thickness required to achieve the required thermal conductivity. They have a vapour barrier built in and can be stuck to a wall with Dri-wall adhesive
http://www.british-gypsum.com/products?cat=thermal