Fixing a stainless steel sheet behind a woodburner stove

[HungerfordMark]

We had tiles glued to a breeze-block pillar that was plastered. As majority of tiles have come away I have bought a 3mm sheet of stainless steel. As the wall is now uneven i have been told to use a sand and cement render before glueing the stainless steel sheet in place (using a heat resistant sealant - i think this will look better and easier than using screws). is there an easier way of smoothing the surface first?
thanks.

 

[big-all]

heeelllooo and welcome HungerfordMark

wood burners need to installed by a hetas engineer or comply with building regs and and be passed by building control
which avenue have you used

 

[HungerfordMark]

Hi Big -All - yes, the stove was installed by a qualified engineer etc...but the wall behind was tiled etc...

 

[Richard C]

Your problem lies in the temperatures involved; only a quality cement powder adhesive not tub ready mix is suitable (up to 150 degrees) & maybe why your tiles failed. Additionally, ordinary gypsum plaster won’t withstand regular exposure to more than 49 degrees, it cracks & falls off. You need a heatproof plaster.

You need a sand/cement/lime render (5:1:1) to withstand the heat, conventional sand/cement render will almost certainly crack.

Not sure about the SS sheet, have you considered it may discolor due to the heat? SS is also a bugger to clean, ask anyone who has a fancy SS cooker, splash back or cooker hood (I’ve got 2 out of 3). What type of “heat resistant sealant” are you thinking of using to secure the SS sheet?

 

[HungerfordMark]

Hi Richard - i have ordered VITCAS Heat Resistant Silicone - i called them yesterday for some advice and they suggested using this silicone sealant as an adhesive for the SS sheet.

 

[Richard C]

I was actually going to suggest silicone may be the best option