I'm planning to put up several interior walls and the plan has been to frame these as usual with 70mm studs, 11mm OSB, and 13mm gypsum board. It got me thinking, aren't there any modern replacements for the combination of OSB/plywood + gypsum board? I'm thinking of a board that has all the advantages (provides stiffness, fire rating, withstands high loads) and costs less than these two boards together. The advantage for me would be that you get a little more living space and hopefully lower costs when there are many walls to be put up.
There are harder plasterboards that you can screw directly into without plugs. However, I have no experience with it. But with a regular plaster wall, you can hang most things without any problem as long as you use the right fittings.
Thank you for your response, but unfortunately, this is not what I'm looking for. I'm quite knowledgeable about different fasteners and have previously installed fiberglass gypsum boards in various forms, which are great if you want higher point loads than what a regular gypsum board offers. However, I'm looking for something that can be used throughout an entire house that combines all the advantages of OSB+gypsum together. I forgot to mention that it should be smooth since I won't be putting up wallpaper but painting instead, though that's secondary.H huggan said:
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A plasterboard costs well below a hundred kronor and OSB somewhere north of that. I really have to squeeze my thrift gut to consider it particularly expensive given the format.
If a replacement were to come that combines both, it would certainly be more expensive. But ultimately possibly cheaper since it's the carpenter who screws it up that's expensive in this context.
If a replacement were to come that combines both, it would certainly be more expensive. But ultimately possibly cheaper since it's the carpenter who screws it up that's expensive in this context.
We don't need to consider labor costs, I have my own agreements and guys and do a lot myself. It's definitely an advantage if the replacement is cheaper than OSB and plasterboard, but if it turns out that the board in question is 2-3 times more expensive for me to purchase, then it's obviously a dealbreaker. The real gain is the few centimeters you gain, I imagine, every little helps...Nyfniken said:
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Modern and contemporary, but screw-glued chipboard behind the plaster is structurally stronger and cheaper than OSB. It is also dimensionally stable and can straighten crooked wall studs with a little tension. However, it requires pre-drilling if you are going to drive screws for fixings and make it optimally strong.
Have started glancing at Magnesium Oxide (MgO) Board, these seem to meet all the requirements and considering that I plan to only use it for interior walls in a nearly-passive house with FTX ventilation, I don't think I will encounter any problems like, for example, those experienced when using these for facades in cold climates (moisture formation and corrosion). I'll have to read more and do my own preliminary study it seems, unless anyone has more suggestions 
Seems like you have to import them, around 75 SEK including Swedish VAT. Shipping will be additional.
Absolutely, the entire construction was heavily delayed due to a neighbor who wanted to complain all the way to the MÖD, as expected he was dismissed there just like in all other instances but that's a story for another day… MgO is still on the agenda, may possibly have to import from another EU country, Ultra Board from Norgips/Knauf is otherwise an alternative.R Raufus said:
If I'm not completely mistaken, MgO is the gray surface on magnesium, so how did they make a board out of it?
I think of bathroom systems when I see the requirements for the material, though the waterproof parts can be skipped. FIBO has one of the systems.
Now I don't know if it exactly meets the requirements today (preferably you don't screw into a waterproofing layer), but in the future, it seems to be a possible smooth solution with the board and surface in one.
I think of bathroom systems when I see the requirements for the material, though the waterproof parts can be skipped. FIBO has one of the systems.
Now I don't know if it exactly meets the requirements today (preferably you don't screw into a waterproofing layer), but in the future, it seems to be a possible smooth solution with the board and surface in one.