Cornelius
Well-Known Member
Just curious at to what the correct procedure is? Sand cement floating has been pretty much obsolete in my time as a plasterer apart from damp proofing jobs. I learned with toughcoat and now hardwall but have used sand/cement on occasions. I’ve looked through some old threads and there was discussion whether you should put one coat on about 11mm or two coats? I do a tight first and then a tight second on hard wall. But with sand cement should you get two coats on? Or aim for one coat. Depends on background I guess. I’ve normally scratched over block work that’s been hacked off so scratch uneven surface and then top over. Also curing times before skimming? I’ve skimmed next day but seems this isn’t correct, five days was mentioned but doesn’t seem practical to wait that long? Lime or no lime? Feb plasticiser or waterproof in the floating? I’ve skimmed over sand cement and we used a blue damp proofing type waterproofer? I’ve also skimmed over work that just had plasticiser in and it pulled in rapidly fast and was hard to keep up with, you don’t get that problem when it has a waterproof in the float coat? Might seem quite basic questions but a lot of the guys on here in there 20’s and 30’s this practice is just not used anymore. What are the general guidelines for sand cement skimming?