I'm preparing the old fireplace for a wood burner and was just wondering if it would be ok / beneficial to fit 100m celotex under 100mm concrete slab?
It's only a small area as pics show, my only concern I guess is the heat going down through the slab and affecting the insulation!
Any advice appreciated
It's only a small area as pics show, my only concern I guess is the heat going down through the slab and affecting the insulation!
Any advice appreciated