Plywood grades

[swarm]

Hi guys i have been pricing things up to start a plywood build my only iffy subject at the moment is the ply is everyone using marine grade ? i can get 19mm stuctural with knots and such for $70 a sheet or marine grade at $180 a sheet. Thoughts, probs, anything

Thanks
Dan

 

[Tstone]

I'm no expert, but i'm pretty sure we just buy the best quality wood, like the $70 sheet you mentioned, and then we use different ways to waterproof the wood..

 

[sirdavidofdiscus]

Marine grade is pressure treated to be used under the water line for boat transoms or boat docks. Not good for aquarium use it'll leach the waterproof /bug restiance chemicals into the water. Best bet is to use birch plywood the thickest you can find. In the States that's 3/4in or about 65millimeters. Here it's slightly cheaper than marine grade.

 

[swarm]

Thanks