osb behind plasterboard 2016 ?

[etnica]

Hello,
in the process of building a house, and as always, a lot of hidden costs have come up everywhere that we're trying to keep down (building in Stockholm).

I currently have a TV, projector, including a projection screen, and I'm wondering if drywall can really support those weights, especially the screen which is not lightweight with its metal chassis and motor.

The question is whether I can install OSB only in the areas where I know extra weight will need to be supported? Or do I need to install it in the entire room since OSB will project outward (I was thinking otherwise one could place it between the studs)?

I will also be installing ceiling speakers and am wondering if these could cause the drywall to vibrate apart if cranked up...

 

[Stefan N]

Should have put OSB everywhere, it's really worth it to be able to screw wherever you want without fussing with molly and other things.

 

[SueCia]

Hello,
I am in the process of building a house, and as always, a lot of hidden costs have arisen everywhere that we are trying to keep down (building in Stockholm).

I currently have a TV, projector including a projector screen, and I am wondering if drywall will really hold up those weights, especially the screen which is not a lightweight—metal chassis and motor.

The question is whether I can install OSB solely in the areas I know will need to bear extra weight? Or do I have to install it in the whole room since OSB will build outward (otherwise I thought you could place it between the studs)?

I will also be installing ceiling speakers and am wondering if those could cause the drywall to vibrate apart if you turn it up..

It's fine to set 45x45 studs 11 millimeters in and then attach OSB to the studs so that the OSB lines up with the other studs. Provided you already know where you are going to mount everything, you can do that.

Drywall barely holds up anything.

The ceiling speakers are unlikely to cause anything to vibrate apart, you're not installing subwoofers there, right?

Personally, I would have installed OSB behind every single drywall board in the entire house, it's worth it as mentioned.

 

[Jojx81]

OSB is of course super convenient to have. But it should be compared against the cost. What does the house builder/carpenter want for this addition? It will be a few boards and a few extra work hours.

 

[f91jsw]

Regardless of what you're installing, you still want to have double layers on the interior walls for soundproofing. And if you're already putting OSB on all interior walls, you might as well do it on the exterior walls too. I think it's penny-wise, pound-foolish not to install OSB.

 

[prototypen]

Everywhere I put drywall, I have something else behind it to be able to hang things without hassle. Building board, plywood, OSB, chipboard, whatever has been available.

Protte

 

[etnica]

Thank you, the answer to the question was that you can place it in certain locations where you know it's needed.

I would love to set it up everywhere if the builders didn’t fleece you so much in Stockholm.

 

[Rabbithole]

If you know where it should be placed, you can reinforce it point by point.
1. Take a chance that gypsum holds (suitable for normal TV using an expander)
2. Screw into the studs behind the gypsum.
3. Insert a kortla (wood piece between studs where needed, common in kitchens)
4. Install a strong board behind the gypsum.

 

[Workingclasshero]

Put OSB everywhere, I have built 180 sqm and have OSB everywhere. Best, just best to never have to worry!

 

[-RB-]

It is clear that you can put OSB on only certain walls. It's not difficult. You do have to cover the whole wall if you don't do as SueCia described above, but it will definitely be much more expensive than covering the whole wall due to extra studs, cutting of OSB boards, etc.

That said, I agree with others that it is good to have something behind the drywall everywhere.

 

[icho]

We placed wood battens behind the gypsum in all the walls. Mainly because it's convenient not to have to worry about what you use to screw something up.

Gypsum holds up surprisingly more than most people think. Knauf states the following for regular mounting screws in a single layer of gypsum—perpendicularly to the gypsum 5 kg, parallel to the gypsum 25 kg. That is, in two regular mounting screws in a single layer of gypsum, you can hang 50 kg. If you use molly bolts, it becomes 25 kg perpendicularly and 75 kg parallel for an M5 molly.