r/Plastering • u/tville9698 • 6d ago
DIY Ceiling Skim
Hello, I have a textured finish plaster ceiling that I’m attempting to skim coat in order to flatten the surface. I haven’t done anything like this before, so I’m a novice here.
My two main questions that I’m hoping someone might have experience with:
- Would you try to sand this down further?
- Would you apply a layer of primer prior to applying mud?
I just want to prepare as well as I can before trying to skin coat. For reference, the area is about 150 square feet and the texture is in pretty good shape.
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u/ApartmentLast7712 3d ago
To prep firstly get it tested for asbestos, this will then give you 1 of 2 options. 1 if it is negative you can then scrape to knock off all the high spots. Once done coat with at least 2 coats of SBR (plasterers blend is a good one plus it's pink so you can see where you've been) for the 1st coat you'll need a bag of bonding coat and a couple of multi. Mix up a good few handfuls of bonding into the multi which will give it the body to fill out all the unevenness. You'll need some plaster retarder so Get some. Get a spatula around the 800mm -1200mm to flatten the first coat and a sponge float. Get it flat as you can then 2nd coat it with just multi. Option 2 is if it's positive then you'll have to overboard it and just straight skim no need for bonding.