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Calcium Silicate Board

How do I fix Calcium silicate board to the wall/batons around my stove

Asked by: Ian CLARK  | 8.13pm, Monday 20 March

WW says:

Calcium Silicate board is very light and doesn't have a lot of strength, so it needs to be well supported. It can be glued with a good quality structural adhesive, which gives an even bond over a large area. For absolute security it would be best to screw and glue the panels, especially if tiles are to be affixed as this will increase the weight. If the screws are near the edge, drill pilot holes to avoid splitting the board.

Rupert Smedley  | 11.48AM, Tuesday 21 March

I have since talked with a carpenter who has used Calcium Silicate board; he suggests painting the board with diluted PVA to seal the surface to give a good bond for fixing and tiling. Using off cuts as battens will give an air gap for insulation. A few screws will not conduct enough heat to produce a fire risk especially if they are stainless steel as it is a poor conductor of heat.

Rupert Smedley  | 10.27AM, Wednesday 22 March

Readers say:

Thank you - I was concerned about heat transfer through metal screws, I'll just have to be tactical with their placing :-)

Ian CLARK  | 6.02PM, Tuesday 21 March

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