plywood or OSB.

[fredriki]

Hi, I was wondering what the different advantages and disadvantages are of plywood and OSB boards for interior walls.

 

[ByggaNytt]

Hello and welcome!

Has been mentioned before but briefly:
Plyfa
- expensive
+ even better pull for nails/screws

OSB
- more "splintery" to handle/saw
+ cheap

 

[fredriki]

thank you very much so in other words what to focus on seems to be plyfa then! but if you think about insulation? both against sound and fire is one better than the other?

 

[ByggaNytt]

Well, both are made of wood so they probably burn it's the gypsum that provides a bit better fire protection... I don't think there's much of a difference in terms of fire/sound but that's not something I considered during the build. It was the price that determined it, so I went with the OSB, but sure, if I had the budget, I would have chosen Plyfa

http://www.byggahus.se/cgi-bin/yabb/YaBB.pl?board=byggmatr;action=display;num=1117573074

 

[fredriki]

yeah, they will definitely burn
does the plywood or osb have any advantage that the gypsum doesn't? besides the price.

 

[mattiasp]

The OSB is completely flat. Plywood is often slightly skewed. I don't think it matters. I was faced with the choice of OSB vs plywood a few weeks ago when they also had a special price on the plywood. 179 kronor for plywood and 149 for OSB/3. I went with OSB. I thought like this: 179 kronor for the cheapest (crappy?) plywood or 149 for the best OSB? (I know, there is OSB/4)

 

[MathiasS]

ja brinna lär de ju göra
har plyfan eller osb.n nån fördel som gipset inte har? förutom priset.

Yes, you can screw things into them without drywall anchors and other hassle.

I have installed plywood + drywall where I know I will need to screw up heavy items, OSB in other places.

If you know you will be nailing something into the panel (like paneling), plywood is better since OSB doesn't hold nails as well (on the other hand, you might construct the wall differently in that case, but still).

 

[TN]

Is OBS suitable as a subfloor?

I am going to install a floating pine floor and previously used cheap plywood underneath,
but it wasn't perfect because the plywood wasn't completely flat.
But is OBS good enough to screw the 25mm pine floor into?

 

[MathiasS]

Is OBS good to use as a floor substrate?

I'm going to lay a floating pine floor and have previously used cheap plywood underneath,
but it wasn't perfect because the plywood wasn't completely flat.
But is the OBS good enough to screw a 25mm pine floor into?

25mm pine floor SHOULD not be laid floating? As mentioned in another thread recently, floor manufacturers strongly advise against laying solid floors floating. Laminate flooring should be used instead for floating installations.

 

[mattiasp]

Is OBS suitable as a subfloor?

I am going to install a floating pine floor and have previously used cheap plywood underneath, but it wasn't perfect because the plywood wasn't completely flat. But is OBS suitable for screwing a 25mm pine floor into?

I think you've misunderstood something. You can't both install it as floating and screw it down. Screwing a pine floor into OSB should work excellently. Don't forget the grey felt paper in between to avoid creaking. As MathiasS says, you shouldn't install solid wood floors as floating. It can work if it's small widths and you avoid laying with a border (frame)

 

[snickarboden]

One disadvantage of OSB is that it is very slippery, handling the sheets by oneself is not always so fun *sigh*
Then there are particle boards, and if you're not going to apply extreme tensile stress, why not.

/Kent

 

[TN]

[quote author=TN link=1139840639/0#7 date=1139921012]Is OSB suitable as a subfloor?

I plan to install a floating pinewood floor, and previously I used cheap plywood underneath,
but it wasn't quite right because the plywood wasn't completely flat.
But is the OSB sufficient to screw 25mm pinewood floor into?

I think you have misunderstood something. You can't both lay floating and screw. Screwing a pinewood floor into OSB should work perfectly. Don't forget the gray paper in between to avoid creaking. As MathiasS says, you shouldn't install solid wood floors as floating. It can work if it involves small widths and you avoid laying with a pattern (frame)[/quote]


Ok, it becomes a kind of hybrid because the wood floor is screwed into the panels that are floating.....

 

[styrman1]

That sounds a bit crazy to me. Isn't the wood supposed to be able to move a little? In that case, can't it just as well be screwed directly into the beams?

 

[siamthai]

It sounds a bit crazy to me. Isn't the point that the timber should be able to move a little? Then it might as well be screwed into the beams directly?

In my house, built in 1925, it was nailed to the beams.

 

[TN]

Cast slab!