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Hello, I am preparing some flooring for tiling. This has involved removing the existing parquet floor covering. In one area the screed was badly cracked and a chunk of screed lifted out. This is in an area where the central heating pipes run.
How is it best to repair this (depth about 70mm), should I remove all the shingle and use some repair mortar or is it sufficient to put the repair mortar on top of the loose shingle to a more shallow depth. I was expecting to find a solid floor slab but the shingle seems to keep going.
Have attached a photo. Thank you in advance.
How is it best to repair this (depth about 70mm), should I remove all the shingle and use some repair mortar or is it sufficient to put the repair mortar on top of the loose shingle to a more shallow depth. I was expecting to find a solid floor slab but the shingle seems to keep going.
Have attached a photo. Thank you in advance.