Damn hot

[Pika1971]

Hi,
I recently had some fireplaces plastered and woodburners installed, but I am finding now that the plaster behind the woodburners is cracking and coming away from the wall, I am guessing that this is something to do with the heat from the fires, but is there anything I can do?

Thanks

 

[joe-90]

If the wall feels hot to the touch then I'd look seriously at why as there is something very wrong.

I doubt that is the case though and the plaster is probably old and the fire has dried it out, it's shrunk and is now loose.

You'll have to chip all the old stuff off and replaster using a 3 to 1 coat of PVA before you apply the plaster.

 

[Pika1971]

The wall is hot to the touch because it has a woodburner very close to it, also the plaster that is coming off is new plaster it was only done a couple of months ago..

 

[joe-90]

It's definitely a shrinkage issue. You need to use more PVA to literally glue it to the wall.

Apply one coat 1 part PVA 3 parts water and allow to dry.

Then when you are ready to plaster apply another coat of PVA that is about 50/50. Then trowel the plaster on whilst PVA still tacky.

 

[Pika1971]

Thanks Joe,

The plaster is literally detaching itself from the wall cracking as if its blown and falling off...

Me thinks I'll try your method...

Cheers

 

[Robbie uk]

Try replacing the area behind the boiler with masterboard. This is heat resistant and can be overpainted.