Thanks for the reply.
I think some of the sharper bits may puncture a plastic dpm, so I'd be happy to seal with sbr and raise it up with cement. I'd just read that under 50mm depth of cement wasn't recommended.
Should I leave a gap around the edges or go right up to the bricks. Cheers
Hi, looking for and advice as to how to proceed. Read the guides but the hole might be too deep at max 60mm.
Removed a kitchen and the subfloor wasn't level under old sink. There's a rectangular hole roughly 1100mm x 500mm x up to 60mm. Original DPM has deteriorated, brick is visible on...