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-   -   OSB vs plywood (http://www.diychatroom.com/f9/osb-vs-plywood-134161/)

zeekdafreek 02-18-2012 12:19 PM

OSB vs plywood
 
:laughing:is osb still an unsafe product to use as roof decking.

have a new project and a renovation. metal roofing to cover.

ty.

joecaption 02-18-2012 12:23 PM

What type metal roofing are you using?

Nailbags 02-18-2012 12:59 PM

You can use OSB But I love plywood.

titanoman 02-18-2012 02:02 PM

Quote:

Originally Posted by zeekdafreek
:laughing:is osb still an unsafe product to use as roof decking.

have a new project and a renovation. metal roofing to cover.

ty.

OSB was never an un-safe product, was it?

Oh. You were laughing about that. Must be some inside joke or something.

joecaption 02-18-2012 02:09 PM

With some metal roofing you do use a soild sheathing under it that's why I asked.

titanoman 02-18-2012 02:28 PM

Quote:

Originally Posted by joecaption
With some metal roofing you do use a soild sheathing under it that's why I asked.

Yeah, I've put solid sheeting under metal. And concrete and clay tile, which was weird, I thought.

joecaption 02-18-2012 02:32 PM

Looks like it may be just another of the one hit wonders.

r00ferguy 02-18-2012 02:55 PM

using osb when putting down metal is a no no the screws wont hold over time and will back out are become weak over time due to the fact there is no holding power with osb.


if you are going to use a standing seem and need a solid deck then i would use no less than 1/2 plywood.

if you are going to use a ribbed metal then plywood are strapping

zeekdafreek 02-23-2012 07:02 AM

Quote:

Originally Posted by r00ferguy (Post 856710)
using osb when putting down metal is a no no the screws wont hold over time and will back out are become weak over time due to the fact there is no holding power with osb.


if you are going to use a standing seem and need a solid deck then i would use no less than 1/2 plywood.

if you are going to use a ribbed metal then plywood are strapping


thanks. that makes a lot of sense.
zeek

zeekdafreek 02-23-2012 07:04 AM

and i appreciate it.

tinner666 02-23-2012 07:23 AM

Real wood planks make a better deck. It's on record as lasting 100's of years. Gaps don't affect it either.

dougger222 02-23-2012 08:42 AM

Quote:

Originally Posted by tinner666 (Post 860917)
Real wood planks make a better deck. It's on record as lasting 100's of years. Gaps don't affect it either.

That's a fact!!!

In regards to gaps however up here in MN we have to deck over planked board with gaps greater than 1/2in. The city requires a solid nailable surface as does the shingle manufacturer. In the past we've gone over roofs without redecking with 1/4in gaps and every now and then you'll end up with a whole row you have to nail high in order to bite into wood.

I feel the best deck material out there is tounge and groove.

We did a tear off last Fall with T&G were the installers didn't push them together. We ended up having to do a deck overlay since the seams were not strong enough to support nails.


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