Hello,
I'm going to build a simple partition wall between two bedrooms with wooden studs and plasterboard.
My question is whether 45x45 studs are sufficient or if it needs to be heavier wood? It will not be load-bearing in any way, just holding up plasterboard and wallpaper.
I'm going to build a simple partition wall between two bedrooms with wooden studs and plasterboard.
My question is whether 45x45 studs are sufficient or if it needs to be heavier wood? It will not be load-bearing in any way, just holding up plasterboard and wallpaper.
That's enough, however, I would prefer 45x70 (or possibly 34x70) as studs.
My experience with 45x45 studs is that they are often more twisted and crooked than, for example, 45x70.
If you're going to have a door in the wall, check the frame width,
with 45 studs the wall will only be 71 mm thick.
-- Arne
My experience with 45x45 studs is that they are often more twisted and crooked than, for example, 45x70.
If you're going to have a door in the wall, check the frame width,
with 45 studs the wall will only be 71 mm thick.
-- Arne
If the span is more than 2 meters, I recommend 45*70 as the previous speaker suggested. And you double gypsum in the walls!!!! Also, 45 mm glass wool or 70 mm works fine as well. The insulation should only dampen internal resonance in the wall, so 45 is plenty sufficient..... but 2 layers of gypsum on each side or OSB, gypsum.... For the sake of sound
When you're building anyway, why skimp and only build with 45x45? It doesn't cost much more to have "real" timber in the wall, and it becomes much sturdier. Punch a wall built with 45x45 studs, and you feel the whole wall vibrate....double plasterboard or not. That doesn't happen with 45x70 studs.
45*45, 45*70, 45*95 etc. same shit different name for stability purposes. 45*45 requires more lateral stabilization than 70 or 95, which is what makes the wall stable in itself. The interaction between the studs and that you blah...blah...blah...
But what I meant with double drywall applies to 45*45, 45*70, 45*95, 45*120, 45*145, 45*170... If you're going for soundproofing, the spacing only affects the lowest internal resonance. Mass, mass, and more mass is the ONLY thing that can address airborne sound.
And as the question was between two bedrooms, you want to address airborne sound 80-90% to achieve a quiet bedroom environment. If there are issues with other low-frequency sounds in the structure, no drywall or concrete wall in the world will help.
So forget stability bedroom 2 layers of drywall / side period.
But what I meant with double drywall applies to 45*45, 45*70, 45*95, 45*120, 45*145, 45*170... If you're going for soundproofing, the spacing only affects the lowest internal resonance. Mass, mass, and more mass is the ONLY thing that can address airborne sound.
And as the question was between two bedrooms, you want to address airborne sound 80-90% to achieve a quiet bedroom environment. If there are issues with other low-frequency sounds in the structure, no drywall or concrete wall in the world will help.
So forget stability bedroom 2 layers of drywall / side period.
Double gypsum is usually done by placing two 12mm boards on top of each other. The first layer is horizontal, and the second layer is vertical.
It is preferable if you don't use a plywood board for the first layer, as that is best in my opinion. Just remember to offset the joints so they don't end up on the same stud.
It is preferable if you don't use a plywood board for the first layer, as that is best in my opinion. Just remember to offset the joints so they don't end up on the same stud.
Do not lay the boards down!!! You offset the joints by one stud. Sure, you can lay the boards down, but personally, as a practitioner, I have very rarely applied this method, and from an acoustic standpoint, it's not good.
Also, you should not screw too much into the first layer, etc.... Especially not when mounting on metal studs or acoustic studs.....
Also, you should not screw too much into the first layer, etc.... Especially not when mounting on metal studs or acoustic studs.....
Does it really make a big difference in terms of sound between single and double drywall? I've built a partition wall with single drywall and 70mm glass wool and I'm not completely satisfied with the sound insulation.
Can I really expect a clearly noticeable difference if I go through the trouble of adding another layer on each side?
Best regards,
Pagge
Can I really expect a clearly noticeable difference if I go through the trouble of adding another layer on each side?
Best regards,
Pagge
It makes a difference of about 10dB, which is one and a half doubling since 6 dB is doubling. Then there are other things that apply as well. But I simply won't go into those in more detail. The cost obviously increases by about 100 SEK/sqm for a finished wall with double plasterboard, but I still insist. 2 layers provide more advantages than those 100 SEK. Soundproofing, wall stability, better surface for painting, better for hanging things like pictures, shelves, and such... sure, you can throw in plyfa between the studs and play around, but I’m just saying it's no coincidence that 90% of all interior walls I've built over the years consist of 2 layers of plasterboard per side.
Had a structural engineer over today who patted our still unplastered interior walls with a blissful expression on his face ;D
"I like this, people are starting to realize that things should be built properly!"
According to him, OSB is used a lot and it's as close to råspont as you can get without it being råspont!
Regarding cracks, hardly, if your house is stable. I have råspont and plaster throughout the house and no cracks at the joints so far, but who knows, maybe they'll come; only have 8 years of history so far
"I like this, people are starting to realize that things should be built properly!"
According to him, OSB is used a lot and it's as close to råspont as you can get without it being råspont!
Regarding cracks, hardly, if your house is stable. I have råspont and plaster throughout the house and no cracks at the joints so far, but who knows, maybe they'll come; only have 8 years of history so far