Revisions log for Answer #511
This is the answer to the question Do I need to remove the screed when installing underfloor heating in an old bathroom?
Revision 1
Local conditions!!! Will all the sanitation items stay in their original places? If not, you may need to screed anyway. You should also pay attention to the condition. The disadvantage of milling is the lack of optimal thermal insulation at the bottom and the uneven heating of the tiles at the top. In a 5m² bathroom this might not be too bad, but in a 20m² bathroom you have to make sure that the heating load is sufficient. Also, grinding always produces a lot of dust and dirt that is so fine that it gets everywhere. So it may well be that chiseling produces less dirt than milling (extraction notwithstanding). Honestly, I can't judge the price.