Plyfa or OSB board under plasterboard?

[Nygge72]

As you can see from the title, I am considering the advantages and disadvantages of using Plyfa or OSB board under gypsum?

 

[PCLarsson]

There are many threads on the topic.... Personally, I chose OSB

 

[FredrikR]

OSB here too, in the garage.

 

[Villa vista]

Plyfa is a better material regarding strength etc. but the price follows accordingly, so if you are considering your wallet, choose OSB, otherwise plyfa

 

[buspojken]

Drove osb, the price decided

 

[Mikael_L]

Plyfa is slightly better in terms of durability, also better in terms of fewer splinters in hands when working with it. Especially if you're being frugal and buying class 3 OSB.

But I didn't think any of it justified the price difference and chose OSB for both the garage and the house.

Particle board underneath is also an option one might consider.

 

[Oldboy]

I have never come into contact with OSB, but with both particle board and plywood. In the absence of real solid wood, plywood is a decent substitute when it comes to nailing/screwing things up. Particle board is completely useless for attaching things.

OSB is probably somewhere between particle board and plywood.

So Villa vista (#4) expressed it well.

 

[twoody]

I think there's a light-year difference between plyfa and OSB, unfortunately, the price is too. If you're using chipboard, you should always pre-drill if you're putting something up, and chipboard is probably the cheapest. But it's clear that plyfa is superior.

 

[Atom]

Älvsbyhus has been building with particle board for many many years. No gypsum. And it holds up. In order of strength and longevity, the following applies.
1. Plyfa. Available in waterproof. Expensive as hell.
2. OSB. Various classes as well.
3. Particle board. If it can be used without gypsum (Äh) the construction is just as good as with gypsum on.

 

[FredrikR]

According to a previous thread where a test/comparison between the disc materials was linked, the result was that particleboard had the worst tensile strength, plywood the most, and that the difference was greater between particleboard and OSB, than between OSB and plywood.

 

[MathiasS]

...and in most practical respects, the difference is negligible.

 

[Atom]

...and in most practical respects, the difference is negligible.

The price excluded.

 

[Mikael_L]

The difference in durability and strength has apparently in tests been found to be relatively small in comparison between these three materials behind the plaster.

I myself found chipboard to have approximately the same price as OSB, so I chose OSB in my case.

 

[MathiasS]

Price excluded.

Technical parameters were intended in my post.

 

[prototypen]

In several of my premises, I have thick masonite (it's called board), and well, it works too.

The downside with OSB is that it is so hard that drywall screws don't countersink themselves, so you have to get another type of screw.

Protte