Is this marine plywood (B&Q)?

Possom

Would anyone happen to know if the Metsa Wood branded exterior plywood sold at B&Q is marine plywood?

http://www.diy.com/departments/exterior-plywood-board-th18mm-w1220mm-l2440mm/892386_BQ.prd

societys_child

Plenty to read here

Are you building a boat . . . ?

keith969

If it doesn't say its BS1088-1:2003 compliant (which is does not appear to), then its not marine ply. The price sort of gives it away, expect to pay double that.

alumende27

It is not. Marine grade plywood conforms to British Standard BS1088.

Possom

Cheers. I had wondered if maybe the use of "external" was an indication that it might be marine, but as you said keith969, the price sort of gives it away.

Mr.Generous

B&Q don't sell any marine ply, it is a lesser quality known as wbp weather bonded ply.

andyhop

Sheet of 18mm marine plywood, to trade £35 plus vat

If your using this for your bathroom floor it's too thin

leveller2911

andyhop wrote: »

Sheet of 18mm marine plywood, to trade £35 plus vat

If your using this for your bathroom floor it's too thin

18mm Marine ply too thin?.......... Marine ply won't have voids in it and as long as the floorboards underneath are fix down properly and the ply is fixed every 200mm or so it will be more than adequate , 18mm won't be flexing if the subfloor and ply are fixed down correctly.


Certainly don't need 25mm Marine ply for a bathroom floor .

leveller2911

Mr.Generous wrote: »

B&Q don't sell any marine ply, it is a lesser quality known as wbp weather bonded ply.

WBP stands for "weather & Boil Proof".

The problem is the vast majority of ply sold as WBP only has to hold itself together in water for at least 72hrs for BS rating. What they don't account for in WBP ply is durability of the timber used to make up the ply so the problem is people use it externally for fascias,boxing-in,sheds etc but if its open to the rain/sun etc it de-laminates very quickly. The only part thats waterproof is the glue but the timbers used are not durable.

Basically if its going to get any rain or sun on it even if painted its not wise to use it. One of our local timber dealers now gives the customer a leaflet telling then what different types of ply should be used for so they ask for the right type because so many people buy WBP ply thinking its good outside.

Lloyds Marine grade ply uses the same glue but they use more durable,stable timbers to form the layers which will not de-laminate .

andyhop

In previous posts by the OP, he was on about removing the floor

18mm is too thin for a new floor, 22mm yes but you'll struggle to find a timber yard that stocks in marine

leveller2911

andyhop wrote: »

In previous posts by the OP, he was on about removing the floor

18mm is too thin for a new floor, 22mm yes but you'll struggle to find a timber yard that stocks in marine

Fairy nuff Andy, just didn't want them thinking they needed 25mm ply over an existing floor..