Hi experts!
I'm tiling a small toilet on a first floor. When I removed the old lino I found some very old tiles (70mm x 70mm x 10mm depth) which had all come loose. I removed those. Now I have a bed of cracked concrete (10mm depth) on another layer (30mm depth) of crumbly grey-ish mortar(?). Underneath this are some kind of wooden support beams 80mm wide, with 20mm spaces between them.
Should I patch up this old concrete or get rid of it all, down till the wood (60mm beneath my original floor)?
What would I use to fill up the gap? Floorboards? Plywood?
Please help! Thanks in advance
I'm tiling a small toilet on a first floor. When I removed the old lino I found some very old tiles (70mm x 70mm x 10mm depth) which had all come loose. I removed those. Now I have a bed of cracked concrete (10mm depth) on another layer (30mm depth) of crumbly grey-ish mortar(?). Underneath this are some kind of wooden support beams 80mm wide, with 20mm spaces between them.
Should I patch up this old concrete or get rid of it all, down till the wood (60mm beneath my original floor)?
What would I use to fill up the gap? Floorboards? Plywood?
Please help! Thanks in advance
