Hello
I am currently renovating a room at home.
My question is whether or not I should use age-resistant plastic.
The house will look as follows from outside to inside:
Brick, asphalt board, insulation/framework, chipboard, gypsum board.
From what I understand after reading threads here, the plastic should go between the insulation and the chipboard. Is this correct?
When I tore down the existing gypsum board, it was covered on the back by a black rubber-like surface. Also, in the seam against the ceiling and gypsum board, there was a black plastic that could very well be age-resistant plastic. However, behind the gypsum board, there was no chipboard.
The house is 1.5 stories with a concrete slab foundation. From the mid-seventies.
This room is on the lower floor.
So should there be plastic or not behind the board?
Very grateful for quick responses as the boards will be installed tomorrow!
I am currently renovating a room at home.
My question is whether or not I should use age-resistant plastic.
The house will look as follows from outside to inside:
Brick, asphalt board, insulation/framework, chipboard, gypsum board.
From what I understand after reading threads here, the plastic should go between the insulation and the chipboard. Is this correct?
When I tore down the existing gypsum board, it was covered on the back by a black rubber-like surface. Also, in the seam against the ceiling and gypsum board, there was a black plastic that could very well be age-resistant plastic. However, behind the gypsum board, there was no chipboard.
The house is 1.5 stories with a concrete slab foundation. From the mid-seventies.
This room is on the lower floor.
So should there be plastic or not behind the board?
Very grateful for quick responses as the boards will be installed tomorrow!
You should probably use plastic since there will be mineral wool behind it; otherwise, you risk warm air, especially during winter, condensing in the colder parts of the wall, which can lead to mold and other unpleasant issues. The plastic should always be placed on the warm side, but if you want to make it extra secure, you can first install the plastic, then a horizontal framework on which you place the boards. In this way, the risk of puncturing the plastic in the future with various screw holes and other things when installing electricals is significantly reduced. The plastic should preferably not be punctured unless necessary. However, this assumes that the plastic is no more than 1/3 of the total insulation thickness.
A small calculation example: if you have 45 mm insulation and then add the plastic, you can have 95 mm insulation more or more, 45+95=140 140/3=46 so according to the calculation example you need 140 mm if you want to have a 45 insulation at the far end.
Ok.
But if I understand it correctly, I can have all the insulation on the "cold" side of the plastic. But if I want to place insulation between any layers of insulation, it's a maximum of 1/3 in from the inside measured.
Maybe silly questions. But it's a bit frustrating to make mistakes and have to redo...
But if I understand it correctly, I can have all the insulation on the "cold" side of the plastic. But if I want to place insulation between any layers of insulation, it's a maximum of 1/3 in from the inside measured.
Maybe silly questions. But it's a bit frustrating to make mistakes and have to redo...
You are thinking correctly, you can have all the insulation on the cold side and the plastic furthest inside the room, but if you want the insulation on the outside to not ruin the plastic, it should be a maximum of 1/3 from the inside counted.