I'm pretty sure that I've asked this before, but my Googling doesn't find it....
I have a space where a fire place used to be. It will be a HiFi/AV cupboard. The walls are part brick and there is also some old cement render which is reluctant to come off. The brick steps inwards by a small amount at the back for the top 200mm of the 80mm high opening above floor level.
Maximum width is about 520mm. Usable width after lining should be at least 460mm to accommodate HiFi separates. So I need to provide a smooth finish which doesn't come in more than about
30mm either side and which can also support shelving. I am picturing some kind of board which can have holes drilled in to take push in shelf supports - much like the Ikea chipboard cabinet I have just by me. I want a board because then I can drill a vertical row of holes for the shelf supports and have very flexible adjustment of whatever kit I have now or buy in the future.So - very thin skim of render to give a flat surface then 18mm board (OSB, WBP or similar) screwed to the brick?
The back of the opening is double brick (no cavity) to the outside so there may be a small chance of damp penetration - in which case will a render with some kind of waterproofing liquid mixed in help at all?
Cheers
Dave R