Fiberboard for canopy. Or 1/4" ply?

[sid700]

Hello. Anyone using this material for their canopy? I'm thinking of using it as the skin and just painting a couple of coats of marine finish.

I'm looking to use something that is lightweight and not expensive. I am hesitant to use 1/4" ply because I've heard it warps quite easily.

Would 1/4" ply warp even if I coated it with spar verathane?

[bassnman11]

Most of the fiberboard materials are a lot heavier than ply due to the glue content. As long as you have a decent framework, the plywood should not warp if well sealed. Use exterior grade ply.

[sid700]

Alright. Thanks bassnman. Quarter ply it is.

[reefdood]

Pay close attentions to sealing the plywood ends, give the ends extra coats and on the final coat don't sand over the ends. I heard most moisture will creep into the ends like a wicking effect if they are not totally sealed.

[Hobster]

Also, if you make a lightweight frame of 1 x 1 or similar and then skin with your 1/4 ply , you should be fine.

[carman9941]

I agree its best to think long term I would use plywood and a good sealant