I am completely new to everything related to renovation. I don't have two left hands, but I've never done any major projects before. Now I'm making some changes in my hallway and thinking of applying Gypsum plaster on all the walls, and a few questions have come up. I tried to get answers at Beijer but their internet connection was acting up, so they couldn't give particularly good answers. They tried to find answers on byggahus.se so I might as well ask myself =)
I have quite a mix of materials on my walls. New gypsum boards, painted concrete which probably also has a thin layer of plaster under the paint, painted fiberglass wallpaper on concrete, wood, old gypsum board that had wallpaper on it.
On which surfaces should I apply primer? I have between 25-30 sqm of wall to be plastered, and the primer only covers 20 sqm. Since that bucket cost almost 900 kronor, I would rather not buy another one. So I need to choose wisely where to apply the primer.
As I understand, the primer should be applied to surfaces that don't absorb, i.e. concrete? But in that case, won't the gypsum boards absorb all the moisture from the plaster, causing it to come off? Or should the gypsum boards have primer as well? Or is an absorbent surface what you want when applying plaster?
What tools should I have to make it as smooth and nice as possible to get everything evenly applied? A regular wide spatula, if so, what length is preferable so that it doesn't become too heavy and cumbersome? Or a wide spatula with two-hand grip?
I have quite a mix of materials on my walls. New gypsum boards, painted concrete which probably also has a thin layer of plaster under the paint, painted fiberglass wallpaper on concrete, wood, old gypsum board that had wallpaper on it.
On which surfaces should I apply primer? I have between 25-30 sqm of wall to be plastered, and the primer only covers 20 sqm. Since that bucket cost almost 900 kronor, I would rather not buy another one. So I need to choose wisely where to apply the primer.
As I understand, the primer should be applied to surfaces that don't absorb, i.e. concrete? But in that case, won't the gypsum boards absorb all the moisture from the plaster, causing it to come off? Or should the gypsum boards have primer as well? Or is an absorbent surface what you want when applying plaster?
What tools should I have to make it as smooth and nice as possible to get everything evenly applied? A regular wide spatula, if so, what length is preferable so that it doesn't become too heavy and cumbersome? Or a wide spatula with two-hand grip?
You should probably manage without priming any surface except wood where you should screw on drywall. Otherwise, just spread the stuff.
Use a trowel or "skånska" to apply, then spread it out with regular spatulas. 45cm should be enough.
If the wall is too uneven, attach some plaster rails in drywall with suitable spacing across the wall along a string that you stretch over the entire wall. Then, level it off with a long straightedge.
Well, there are different ways; this is one.
Use a trowel or "skånska" to apply, then spread it out with regular spatulas. 45cm should be enough.
If the wall is too uneven, attach some plaster rails in drywall with suitable spacing across the wall along a string that you stretch over the entire wall. Then, level it off with a long straightedge.
Well, there are different ways; this is one.
Well, I don't know anything, so I'm grateful for all the suggestions I get.
Hmm, so maybe the primer isn't needed anywhere? But what kind of surface are you aiming for when applying plaster? Should it just absorb a little moderately? And does concrete with paint on absorb? Or concrete, fiberglass cloth, and then paint? In my layman's world, those materials don't absorb at all.
Wood and gypsum, I can understand they absorb. But do they absorb too much for me to just apply mortar directly, or should I spray a little water on first?
The wall isn't that uneven, mostly I want to get rid of the fiberglass cloth texture and have a uniform wall everywhere. But are there any tricks to successfully get 3mm thick plaster over the entire wall? Or should you just go by feel?
Should you do the entire wall at once, or can you continue the next day without any ugly seams? In that case, is it advantageous to start and end in a corner to hide a seam?
There are a lot of questions, but I'm quite disappointed with the store where they mostly just mumbled without giving any clear, straightforward answers. They seemed unsure about everything. I hope someone can give me a little more help here.
Hmm, so maybe the primer isn't needed anywhere? But what kind of surface are you aiming for when applying plaster? Should it just absorb a little moderately? And does concrete with paint on absorb? Or concrete, fiberglass cloth, and then paint? In my layman's world, those materials don't absorb at all.
Wood and gypsum, I can understand they absorb. But do they absorb too much for me to just apply mortar directly, or should I spray a little water on first?
The wall isn't that uneven, mostly I want to get rid of the fiberglass cloth texture and have a uniform wall everywhere. But are there any tricks to successfully get 3mm thick plaster over the entire wall? Or should you just go by feel?
Should you do the entire wall at once, or can you continue the next day without any ugly seams? In that case, is it advantageous to start and end in a corner to hide a seam?
There are a lot of questions, but I'm quite disappointed with the store where they mostly just mumbled without giving any clear, straightforward answers. They seemed unsure about everything. I hope someone can give me a little more help here.
Have applied gypsum in my bathroom where there was painted plaster, scraped wallpaper, brick, and the tiles are still holding up today 
If you suspect the substrate is too dry, feel free to pre-wet it.
Regarding the even layer, you probably have to go by feel. To even it out afterwards, you can scrub it with a large wet sponge when it is "tack-free" so to speak.
If you suspect the substrate is too dry, feel free to pre-wet it.Regarding the even layer, you probably have to go by feel. To even it out afterwards, you can scrub it with a large wet sponge when it is "tack-free" so to speak.
It's not easy being a beginner. I also emailed Maxit and tried to get an answer there. But they thought I should prime and put up mesh as well so that it adheres well. Of course, they say that because they want to sell things and they have both belt and braces. Then it can't go wrong.
What I would need is experience from others on what they have done that worked, like lajsiiwan. But maybe I should have had a different name for the thread so perhaps more people would leave their experiences.
I might be unnecessarily worried, but I have no experience with either plaster or mortar or anything, so I don't know how well it actually adheres to walls.
What I would need is experience from others on what they have done that worked, like lajsiiwan. But maybe I should have had a different name for the thread so perhaps more people would leave their experiences.
I might be unnecessarily worried, but I have no experience with either plaster or mortar or anything, so I don't know how well it actually adheres to walls.