Insulating Wall Between Sunroom and Main House

djcrip

Hi I have a 115mm cavity block wall between the sunroom and main house. I was advised to treat this wall as an external wall. Therefore I decided to pump this cavity with expanding polystyrene beads instead of using the 80mm rigid insulation which I used on the rest of the house. I have since rendered this wall with sand and cement. However I am now trying to determine whether or not I should also dry line this wall on both sides??

Please help I am drylining inside of all external walls with 52mm insulated plasterboard.

Jonny Harris

Its not essential but if you want to blow some more money do it.
regards

dathi

it is essential as the cavity insulation will not prevent the heat loss through the external block work wall. what you have is a massive thermal bridge. in lay mans terms the block wall in the sun room is the same block wall on the outside of the house so as you try to heat the sun room the heat travels out through the blocks to the out side wall.

Jonny Harris

I don't agree. Is Daithi a typical proffesional who talks down his nose to someone he thinks is not as wise as him or is he an opinionated chancer?
Either way, I still don't think it is necessary
Regards

Jonny Harris

Ps. He is filling the cavity

MicktheMan

Jonny Harris wrote: »

Ps. He is filling the cavity

So what?

Dathi is correct wrt the thermal bridge. Whether the cavity is filled or not is of no significance.

djcrip

Thanks for all the feedback and for the sake of a couple of extra drylining boards I think will also get this wall fitted with insulated plasterboard.