OSB2+??

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Inchy

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• 5 Feb 2021

• #1

Hi all -

I ordered some OSB3 from a small local supplier, but now I look at it it's marked as OSB2+ which I can't find any info on online. It's made by Norbord (but no info on their website) and marked as 'SterlingOSB' and 'Structural 2+' then a load of illegible writing.

Have I been given the wrong stuff? I need something suitable for outdoor conditions (albeit not directly exposed to the elements), not just OSB2.

 

freddiemercurystwin

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• 5 Feb 2021

• #2

OSB2 is for interior work (where it's dry), OSB3 is for where it's used in conditions where it may be exposed to moisture eg behind timber cladding or as roof deck.

Change it for OSB3.

 

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Inchy

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• 5 Feb 2021

• #3

freddiemercurystwin said:

OSB2 is for interior work (where it's dry), OSB3 is for where it's used in conditions where it may be exposed to moisture eg behind timber cladding or as roof deck.

Change it for OSB3.

Click to expand...

Cheers - I understand the differences, but don't understand what OSB2+ is supposed to be. Is it just a variant of OSB2 that will have the same limited weather resistance, or is OSB2+ the equivalent of OSB3? Literally nothing on Google about OSB2+.

If it's under an EPDM membrane, does it even matter?

 

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endecotp

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• 6 Feb 2021

• #4

Norbord now sell something they call “osb zero” because it has no formaldehyde, and they have removed all mention of their previous products from their website. I discovered this because I have some of the older osb 3 boards and needed to find out something about them, but hit a dead-end.

I do vaguely recall “2+” as being a thing. If you really want to know what it is, try phoning norbord.