I'm planning to mount double layers of fire-resistant gypsum behind a stove. But what finishes can be used on the board? The gypsum board itself is covered with paper/cardboard from what I can read.
It depends a bit on what the purpose of the fire protection is. Gypsum boards don't like heat or thermal radiation from a stove because the water of crystallization evaporates and they become porous. The paper covering also doesn't particularly like heat, although it is more resistant than the gypsum itself. But if it's not a space that gets warm or is exposed to thermal radiation, regular wall paint is fine. Or wallpaper. Both are more heat-resistant than the gypsum board anyway.
If instead, it's about radiant heat from the stove, you should consider another board, like calcium silicate. Or masonry.
If instead, it's about radiant heat from the stove, you should consider another board, like calcium silicate. Or masonry.
Construction veteran
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I don't think plaster is approved unless you have significant distance.
There are special fireproof boards or alternatively a stone slab.
If you use a stone slab, I also think it should be mounted with a spacer to create an air gap behind.
I used a fireproof board myself and was then able to move my stove closer to the wall.
So instead of 150 mm to the wall, we came down to 50 mm, saving us 100 mm.
There are special fireproof boards or alternatively a stone slab.
If you use a stone slab, I also think it should be mounted with a spacer to create an air gap behind.
I used a fireproof board myself and was then able to move my stove closer to the wall.
So instead of 150 mm to the wall, we came down to 50 mm, saving us 100 mm.
It was a type like this one I've been thinking about. Costs very little compared to other fire protection boards but is among other things thinner.
https://www.byggmax.se/gipsskiva-p0...K49xv4ExJh5cR2tCB-UGTBoCycQQAvD_BwE#717=44563
https://www.byggmax.se/gipsskiva-p0...K49xv4ExJh5cR2tCB-UGTBoCycQQAvD_BwE#717=44563
It is more to protect you when your house is already burning, so you have time to get out before the fire has spread.Ulltand said:
Note the approved usage temperature:
"Usage temperature: +10°C to +40°C."
This is because gypsum cannot withstand higher temperatures due to the crystal water departing, and the board becomes powder again.