I need to do quite a lot of patch repairs (mostly where I've chased out elctrical cable runs) on an internal wall which had been previously sand- cement rendered up to 1m, presumably due to s damp problem at some time in the past. No sign of damp now, but I'd rather do the repairs properly with similar sand-cement basecoat to avoid potentially compromising things. One area is about 2'x3' though. I've got a plasterer booked to skim the whole room afterwards.
Question - how long should my repairs be left to cure before overskimming? I've been googling and advice seems conflicted as to whether it should be left for weeks until it's bone dry, or done within a day so it's deliberately still damp!
I'm on a rather rigid schedule, in that I have the plasterer booked to start here on a Wednesday (I doubt he'll be skimming till Thursday though), and I was hoping to do my stuff the previous Sunday (I get back from holiday on the Saturday). Will that work? Or do I need to do it tonight after work, which I *really* don't want to do but is the only other realistic option, giving a gap of 2.5 weeks?
Thanks