this about mdf + gypsum board?

[Yrrol]

Many seem to use MDF or whatever it was called as a base, then add 13mm gypsum... but is a thin MDF enough to mount things without plugs?

* How thin can it be... do you use 120 sheets... then 60 gypsum? Or 120 of both, just making sure that the screws are positioned so they don't collide?

* Do you glue anything and what kind of glue do you use?
This thing about gluing feels daunting, but necessary otherwise it might sound weird.

* Is it only advantages and no disadvantages other than the extra costs?
* Is a 6 or 8 mm board enough?

 

[Larsa]

Do you mean OSB on the wall?

 

[Yrrol]

Yes, it might have been OSB everyone was talking about... but the fastening, they're 11mm thick... then it has to be renovation gypsum at 6mm instead, otherwise there will be nothing left of the rooms...

 

[tarantino1]

MDF sounds very expensive to me as a base. House manufacturers often use thin tongue and groove, chipboard, or OSB board. It seems unnecessary to glue between the plasterboard and the boards. It's perfectly fine with 120 plasterboard on top, but it might not hurt if you stagger the joint by half a board.

I probably wouldn't screw/nail the bottom board so closely but would instead choose to use longer plasterboard screws that go through both layers of boards and into the frame.

 

[kalubah]

Don't forget that if you have any requirements for soundproofing, gypsum is the way to go. Normally, you should have at least 13mm on each side, but preferably 2x13mm.

 

[petim]

I used OSB behind the drywall on the walls where I knew I might mount something heavy, like a flat-screen TV. Cheap material!

 

[Yrrol]

Is there OSB that is thinner than 20?

Counter with; is there any point with 20mm + 6mm renovation plasterboard?

 

[MaZtoR]

Is there OSB that is thinner than 20?

Counter with; is there any point with 20mm + 6mm renovation plasterboard?

You write yourself that they are 11mm. Where did you get 20 from?

 

[Yrrol]

Oh, I'm comparing everything from antenna cables, network cables and different wall panels so it's getting dizzy

 

[Byggingenjören]

Hello!

Maybe I misunderstood, but why don't you just use plyfa gypsum (or renovation gypsum)?

Regarding measurements, use 900 substrates and then offset the outermost layer by 450 so everything will be just fine? d^_^b

Best regards!

 

[Yrrol]

I actually like the idea of mixing materials... I believe in the theory that different materials block different types of sound waves..

Also, I am so unsure when it comes to using the right wall anchors etc., so it would be nice to avoid that...

 

[Byggare Nilsson]

Hello!

Maybe I misunderstood, but why don't you just use plyfa gypsum (or renovation gypsum)?

Regarding measurements, use 900 base and then offset the outermost layer by 450 and everything will be hunky-dory? d^_^b

Best regards!

Another option is to lay the first layer (OSB) and then install the gypsum. Then you don't have to worry about where the studs are when you screw in the gypsum; it's enough to just screw it into the OSB board

 

[Yrrol]

but 6mm plasterboard on top... is it too thin so it just becomes crap or does it work?

 

[qvimeq]

The most common is probably 11 or 12mm OSB and then 13mm gypsum (for some sound and fire protection). Mixing MDF into this seems dumb and expensive, which surely many would agree with.

 

[Stommen]

Here is a small guide on what you may need:

http://www.beijerbygg.se/templates/BB_ByggradListItem.aspx?id=52659

In terms of price, OSB provides the best load-bearing capacity per crown, while plywood has certain other good properties.

Here you can compare Beijers' prices. It is possible to get away cheaper!

Particleboard 12 mm 36:50 kr/m2
OSB 11mm 47:50 kr/m2
Construction plywood 12mm 5-ply 73 kr/m2