plaster to use round woodburner

[what..the?]

My wood burner installer has said to buy a heat resistant plaster in a tub from a shop I have to drive 30mins out to. But my builders are insistant to use normal plaster instead and say normal plaster is just as heat resistant. I think the heat resistant plaster will potentially cope with the excessive heat more and won't readily crack as much as normal plaster?

Any advice, the builders are quite insistant I don't need to spend the extra money??

[The Builder]

Another can of worms Mrs What ;o) I guess you mean in the masonry close to the w/b .......... but not actually touching it.
I would say that ........ if it's a high kilowatt burner only a few inches from the wall, then ordinary gypsum plaster will shrink, craze, and possibly fall off.
On the other hand, if it's say, 12" (300mm) away from a moderate heat burner, then gypsum would probably be ok. It's all a matter of experience and on the spot judgement. I can't really be more helpful than that, I'm afraid.
Whereas a 25kg bag of skim would cost around £6, 25kg of Heat Resistant might be around £90........... I guess that's their problem.

Manufacturers are notoriously over-careful with their recommendations. This is where experience comes in.
To say that gypsum is as good as H/R is rather stupid though.
What are the clearances?

[what..the?]

6-8 inch clearance on sides possibly less on the back by the looks of it...all a guess as not onsite at the mo and it's a 8kw wood burner

[The Builder]

Might get away with it Mrs W. 8kw going flat out .......... who knows? I think I would be inclined to go for
fire-resistant board (used to be asbestos)
or sand & cement render (sponge finish) without the final gypsum coat
or tiles.

Of course, heat resistant plaster if you can convince them.

[The Builder]

Al will pick this up later. He'll have an opinion. :o)

[what..the?]

well I have a fire resistant 'master board' dot and dabbed on there but in a few area's they have used screws to attach the board to a battening behind and also in the corners with are slight gaps where they have then used that taping mesh to stop/limited plaster cracking as a result it is not a finished surface with the master board, therefore I don't think just painting on top will work.unless there is some other fire resistant 'filler' which is a lot cheaper and could just be put over the screw heads and corner net/mesh and sanded flat and painted?

[The Builder]

Masterboard ........... that's the stuff. I couldn't remember the name.
I wouldn't want to skim that for fear of it coming off again. The screws should be tightened to just below the surface and Polyfilled. The mesh (probably scrim cloth) would be difficult to cover. I would take it off and squirt Decorator's Caulk (with a mastic gun) into the joints, and paint over.
Nothing wrong with that if a good decorator does it properly :o)

[what..the?]

http://www.theanswerb.../Question1071923.html

Thanks so much for the advice on that. Is there anyway to get your assistance on the above question linked above thanks so much

Mrs What x

[The Builder]

Just replied to that Q Mrs W :o)