Hi I've found a picture of the building plaster if helps a little:
And just says on the back:
building gypsum Gray-white powder obtained by thermal treatment of crude gypsum rock. Hygroscopic building product applicable for use in dry areas, finishing, ability to form a plastic mass on mixing with water, the possibility of multiple use in construction. application: - In plastering, the substrate must be sound, dry, flat, without contamination from oil, dust and debris. - Gypsum is added to the prepared water, then stir until a homogeneous mass, water / gypsum - 0.6 to 0.8 parts by weight of water to 1 part by weight of gypsum.
Doesn't say anything about the depth or anything about using with a topcoat product, although does state that this plaster can be used for finishing so maybe i can use 1 coat of this with 2nd coat satin. What do you reckon?
Working in the dark here so very hard to advise you.
Is the base coat similar to the top coat ie does it have small lumps in it or is it a consistent powder?
Base is grey, top is white, both appear to be same consistency. Tricky to explain but i put my trowel in both of them and although there are little lumps, they break when i move them with my trowel if that makes any sense
Is your intial coat very flat and closed in well?
Yes, infact it's a great surface because it's like a cement render thats been on for years, but would require two coats of any sort of plaster as it's very course.
What thickness final coat do ou need to get on - can you do 2mm?
I need to do two coats 2mm each which is normal isn't it I think. Because usually people start with undercoat on masonry, then two top coats of finishing plaster.
Sorry, but I don't think you are being ignored - just that is is vortually impossible for anyone here to give an answer that is not just a guess.
It's ok, it's just im anxious to get started you see because I'm worried about the plaster going to go off soon as it's been opened and im in quite a humid area. I know it's irrelevant but just to cut long story short, english builder friend was doing a plastering job for me because he owes me money and half way through job we had a disagreement over what he'd be willing for me to take out of his wages and he basically went against what we'd originally agreed before he started the job so he has now walked off the job and now im left to plaster the other half lol, well, admittedly just 1 wall with what little plaster is left lol. He admitted that he hadn't even ordered enough top coat plaster
Don't worry if you're not sure, please don't be worried thinking that if it goes wrong I'm not going to be coming back and complaining
I've asked other people and they dont seem to know either although they're not plasterers. If the worst comes to the worst I'll just have to scrape it all off and just start again with 2 coats of satin instead of 1 coat building plaster and 1 coat satin.
So last but not least, if you had to guess, what do you reckon would be the worst thing that could happen? It can only start falling off the wall, in which case at least i wont have to scrape it all off by hand
You need to talk to someone who has used the stuff .
Wish i could
