On Tuesday, January 15, 2013 11:48:51 AM UTC, polygonum wrote:
On 15/01/2013 11:46, Dom Ostrowski wrote:

On 15/01/13 09:27, Tim Watts wrote:



Ply or OSB for structural sheeting work?



And if ply - what does "structural ply" actually have over "regular" ply,



For your application the incremental cost of using a better quality

product is likely to be small, so I would suggest buying exterior ply.



AIUI "structural" means "tested as conforming to a standard".



With timber joists that means each individual joist rolls through a

deflection test machine and is automatically labelled (e.g. C16, C24).

Don't know how they test sheet products.



But just what is better about ply than OSB?



--

Rod

Quote from sterling board product details:

Sterling Roofdek is designed specifically for flat roof decking and
pitched roof applications. The board combines all the features and benefits
of SterlingOSB T&G and measures 2440x1200mm; perfect for roofing
The sanded surface is designed to offer excellent adhesion for glues,
self-adhesive felts and bitumen. The board is completely free from
voids and knots and provides the ideal solution for roofing.
In other words, it's as hard working as you are. Sterling
Roofdek is BBA approved, and permitted for structural
applications under BS 5268:Part 2.1996 and Eurocode.

That also implies that the other Sterling OSB boards do not comply with BS 5268.

Simon.