Marine grade or not

[Chickie]

Do I need to use marine grade plywood for the floor or can I use exterior plywood?

 

[Northstar T]

Do I need to use marine grade plywood for the floor or can I use exterior plywood?

The only difference in the two is in the amount of plugs and voids in the laminations. same glue etc. so I would say no, you don't need marine grade plywood.

Russ

 

[ellis8500]

Northstar T is correct. Marine plywood does not have interior voids as might be found in exterior grade. I used exterior grade to build a sailboat back in 2000. Wood covered with fiberglass. Sold it this past June and hull still looked as good as the day it was first launched.

 

[jackfordt]

Personally i used regular plywood but i covered it with fibreglass, its quite easy and you don't see plywood under your car.

Do I need to use marine grade plywood for the floor or can I get by with exterior grade?

 

[butch27]

Same here.

 

[benT]

We used exterior grade plywood and coated it several times with fiberglass resin. Worked well. I couldn't see paying all that extra $$ on the marine grade.