OSB3

[Mr_T25]

Is it ok to use OSB3 18mm for internal structural flooring directly on top of floor joists instead of 18mm ply?

Is there any downside to using OSB3 internally?

 

[geraldthehamster]

A piano leg will go straight through it.

 

[Doggit]

Great for shuttering and sheds etc, not so good for holding things up.

 

[Mr_T25]

Ok thanks didnt know that. Why is that? I thought if it was used for structural decking on flat roofs it could be used internally as it looked pretty strong. 18mm ply is stronger?

 

[Doggit]

OSB has some unusual properties, but it's basically flakes glued together. It a variation on chipboard, but because it's flakes, has greater latteral structure, so will flex more than chipboard does. When it's used for a flat roof, there's nothing that heavy being put on top of it.

 

[rssteve]

I've just done my flat roof in osb3 t and g. It looks way different to the usual osb, much smoother and looks more compacted.

 

[^woody^]

I've just done my flat roof in osb3 t and g. It looks way different to the usual osb, much smoother and looks more compacted.

Have you done the piano test?

 

[Doggit]

Is that a morcambe and wise joke?

 

[John D v2.0]

Hard to believe but not everyone has a piano. Some people don't even have a flushing toilet!

 

[Doggit]

Is this the point where we start getting the Monty Python jokes.

 

[catlad]

I've used OSB 3 for floors without problems
I should point out that I don't have a piano

 

[tomfe]

OSB is fine for floors, used in all new builds (well many).
It's also used for industrial shelving.
I am sure I've also seen piano crates made out of it

 

[geraldthehamster]

I've just done my flat roof in osb3 t and g. It looks way different to the usual osb, much smoother and looks more compacted.

I noticed that the last lot of OSB I bought for a flat roof had a smooth, shiney finish. I wonder if that is a response to all the housey programmes on TV, where hipster designers mistake OSB for an interior finish for walls?

It was less smooth and shiney after a week outside, anyway.

 

[John D v2.0]

I noticed that the last lot of OSB I bought for a flat roof had a smooth, shiney finish. I wonder if that is a response to all the housey programmes on TV, where hipster designers mistake OSB for an interior finish for walls?

It was less smooth and shiney after a week outside, anyway.

Doubt they'd make fancy coatings on all the stock just for a few people using it in a novel way! If they did one itd be 20x the price

 

[geraldthehamster]

It doesn't make it easier to lug about