Which gypsum plaster !

[Carla]

Hi, I have decided to use gypsum plaster on some walls in my basement. I have looked a bit at costs and it seems that Knauf/Danogips is available for ~100 kr/20kg while Weber Gypsum costs ~250 kr/25kg. How can that be, does anyone have experience with these different plasters and why there might be such a price difference?

 

[Niclas Jonsson]

Don't know, maybe the difference is that the more expensive one can be used in a spruta. If you assume you're carving by hand, then the cheapest one will do just fine. Feel free to use avdragarbanor to make it easier to get it even.

 

[ZipLock]

When I asked at Beijers, they claimed that Knauf/Danogips was intended to "glue" plasterboards, while Gypsum was intended for plastering.

 

[HSP]

Make sure it's gypsum plaster you're looking at, gypsum plaster contains a bit of "sand." It costs about 250kr / 25kg "Finja" here.

The other variant for gluing up plasterboards contains gypsum and adhesive and is cheaper. It costs 100kr / 30kg, it also "shrinks" during drying.

Make sure the walls are free from moisture issues when using gypsum plaster

 

[SBH]

When I asked at Beijers, they claimed that Knauf/Danogips was intended to "glue" gypsum boards, while Gypsum was intended for plastering.

found this. refer them to this product
http://byggsystem.knaufdanogips.se/products/gypsum_plaster/by_hand/index.html

 

[Kurtivan]

Are you thinking of plastering interior walls in the basement? Then it should be okay with gypsum plaster; it's probably not recommended for exterior walls.

 

[Carla]

It is the Gips plaster I've been looking at, and it seems to me that it does the same thing as Gypsum, but I'm not sure. It seems like it should be "spread out" within 20 minutes after mixing, I don't know what the equivalent time is for Gypsum.

Is there anyone who has used this Gips plaster who can share their experiences?

 

[MaxPax]

I don't have an answer for that particular product, but I have used gypsum many times with good results and reasonable times after mixing. I recall an occasion with a colleague who was going to plaster with a gypsum mortar the customer had bought (don't know which one). It hardened while he was mixing it with the mixing paddle, became rock hard, and the customer had to buy a new mixer paddle. There must have been some sort of handling error, but one might assume that all gypsum mortars behave the same way. Not so.

 

[SBH]

http://www.weber.se/fasad-puts-och-...m/invandiga-putser/webergypsum-naturgips.html

 

[dadid]

I have two bags of plaster that have been in our carport since last fall. Should I assume that it cannot be used or is it worth testing?

 

[Mikael_N]

The plaster from Knauf is, in my opinion, more suitable for use as spray plaster or as a base coat for gypsum board since it dries significantly faster than Gypsum from Weber. However, the Knauf plaster becomes more pore-dense than Gypsum but, as mentioned, due to its open time, requires faster application. Another thing that may differentiate these is the thickness you can plaster with; gypsum is for 5-50 mm if I remember correctly, I don't know the spec for Knauf plaster.

Personally, I prefer Gypsum from Weber, having used it a lot as a carpenter, and it is the most workable according to me. The result is very good if you plaster the wall and then let it dry just enough that it is not soft anymore, then you scratch the surface with a plastering float, and finally, "polish" it with a washing board.

Good luck/ M

 

[olofh]

Just plastered a wall. First bought the expensive variant before I found a store that had both types. I think the more expensive one was more stony and had a coarser texture. The cheaper one was more gypsum-smooth and I thought that turned out better.

 

[Carla]

Was it difficult to apply before it solidified?

 

[olofh]

Was it difficult to apply before it set?

The first bag before getting up to speed, but it worked well anyway. A tip is to use leveling tracks in steel, they were cheap and helped a lot. Then I polished with a steel trowel. Before doing that, you should let the plaster set a bit on the surface. Check YouTube, just search for plastering. It can help to have a spray bottle with water on hand and be gentle.

 

[anders07]

When I asked at Beijer, they claimed that Knauf/Danogips was intended to "glue" plasterboards, while Gypsum was intended for plastering.

Exactly the same info I received from a builder and at the construction store... Knauf/Danogips can also be used for smaller repair works, my builder said.

First sack before getting up to speed but it still worked well. Tips are to use steel guide rails, they were cheap and made it much easier. Then I sanded smoothly with a steel trowel. Before doing this, let the plaster set a bit on the surface. Check YouTube, just search for plastering. It can help to have a plant sprayer with water on hand and be gentle with it.

Perfect advice!
Don't be stingy with the water sprayer and buy one that you can pump up pressure in so it sprays very evenly and nicely...