Why does everyone use OSB behind drywall?

[Mikael_L]

Particleboard is actually not so bad to fasten into (even 10 and 12mm). However, you should pre-drill before screwing, otherwise, there's a relatively high risk that it won't hold very well. And this extra step is a major disadvantage for the particleboard.

 

[Cheesen]

a question particleboard vs. OSB which is stronger? The particleboard costs 73 kr and OSB 128 kr

Have you gotten any quotes? Then also check what plyfa costs... If you're lucky, it won't be significantly more expensive but the quality of the end product will increase considerably.

 

[SpackelFredrik]

Alternatively, you can use Gyprocs Habito board. Then one layer of board is enough, and you can avoid OSB in the walls. You can hang up 35 kg without a plug or molly in the Habito board, which is incredibly hard.

 

[Ragganof]

Or you can use Gyprocs Habito board. Then one layer is enough, and you don't need OSB in the walls. You can hang up 35 kg without a plug or molly in the Habito board, which is incredibly hard.

It's just a shame that it's so darn expensive.
I was planning to use it myself, but it became 50-60% more expensive.

 

[FredrikR]

Have you obtained quotes? Also check what plyfa costs... If you're lucky, it won't be much more expensive, but the quality of the final product increases significantly.

In what way does the quality increase significantly with plyfa instead of OSB under the gypsum?

The difference between OSB and chipboard is twice as large as between plyfa and OSB (tensile load in the screw's longitudinal direction).

Nothing falls with OSB, but if you want to "throw money away" for the feeling, go with plyfa...

 

[-RB-]

One can at least check the price. If it's only a difference of a few hundred kronor, I know what I would choose. I tend to always cut myself on OSB boards, so from a handling standpoint, I easily choose plyfa.

 

[Anders & Ming]

ok, will now send out quotes for OSB and gypsum Then I'll take the opportunity to check other materials the premises should have IE 30 but the ceiling should have IE 60 so I need double gypsum there

 

[Anders & Ming]

This is what the venue looks like from the outside.

 

[Cheesen]

In what way is the quality significantly improved with plywood instead of OSB under the drywall?

The difference between OSB and chipboard is twice as large as between plywood and OSB (tensile load in the screw's direction).

Nothing falls down with OSB, but if you want to "throw money in the lake" for the feeling, go with plywood...

I've seen both kitchen cabinets and handrails "fall down" when OSB has given way. In both cases, a piece of the OSB came loose and took part of the drywall with it. I promise it wouldn't have happened if there had been plywood behind it.

 

[Demmpa]

In wet areas, there should be either gypsum&plyfa or gypsum&osb with noggings where sinks etc. are to be mounted, the reason being that osb breaks more easily than plyfa.

 

[Daniel 109]

It doesn't need to be double boards just because it's a wet room.

 

[henkop]

An addition if it hasn't been written yet:
It also becomes easier to mount the drywall against a solid surface where you can screw anywhere, and you don't have to be as precise with the measurements when you use OSB in combination with drywall. You can use scrap pieces in a completely different way. It also becomes easier to spackle if you've missed with the drywall somewhere.

 

[catherineb]

We have placed particle boards behind all the drywall. Partly for soundproofing and partly to be able to hang paintings, put up shelves, etc.

I don't know why one would choose OSB instead of particle board? Is it cheaper?

 

[Rabbithole]

It is significantly stronger.

 

[Mikael_L]

Well, OSB is only slightly stronger than a properly fastened screw in particleboard.

However, the correct practice is to pre-drill in particleboard before screwing in the screw to ensure the most durable fastening. This is because particleboard sometimes splits in the middle, creating a crater behind if you just force in a screw without pre-drilling.

So, it is essentially equally durable, but additional steps are needed to ensure perfect fastening.