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Marine grade plywood


Pigeontroller

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I am a contractor who uses Peacock Lumber in Oshawa quite frequently. I asked about marine plywood a while back and they told me that marine plywood is constructed differently then regular plywood. It's all in the the way they construct the core of the sheet. All plywood is made up of a series thin layers that are laminated together to reach the specified thickness. In regular plywood these layers are made up of smaller pieces that are placed beside each other during laminating, this causes voids in the sides where water can get in and do it's damage. On marine plywoods the core is made up of pieces of laminate that stretch the whole length of the sheet, eliminating the voids from the melding of the layers side by side. They also use an exterior grade glue. When you hear of it being a mahogany sheet this only refers to what the exterior layer of laminate is made of. I hope this clears up the confusion.

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I am a contractor who uses Peacock Lumber in Oshawa quite frequently. I asked about marine plywood a while back and they told me that marine plywood is constructed differently then regular plywood. It's all in the the way they construct the core of the sheet. All plywood is made up of a series thin layers that are laminated together to reach the specified thickness. In regular plywood these layers are made up of smaller pieces that are placed beside each other during laminating, this causes voids in the sides where water can get in and do it's damage. On marine plywoods the core is made up of pieces of laminate that stretch the whole length of the sheet, eliminating the voids from the melding of the layers side by side. They also use an exterior grade glue. When you hear of it being a mahogany sheet this only refers to what the exterior layer of laminate is made of. I hope this clears up the confusion.

 

Yes a bit. thank you.

What about Full Marine vs Marine Sub

 

forrest

is this OT?

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I am a contractor who uses Peacock Lumber in Oshawa quite frequently. I asked about marine plywood a while back and they told me that marine plywood is constructed differently then regular plywood. It's all in the the way they construct the core of the sheet. All plywood is made up of a series thin layers that are laminated together to reach the specified thickness. In regular plywood these layers are made up of smaller pieces that are placed beside each other during laminating, this causes voids in the sides where water can get in and do it's damage. On marine plywoods the core is made up of pieces of laminate that stretch the whole length of the sheet, eliminating the voids from the melding of the layers side by side. They also use an exterior grade glue. When you hear of it being a mahogany sheet this only refers to what the exterior layer of laminate is made of. I hope this clears up the confusion.

 

The finish layer is Mahogony which is used to show an exterior finish better looking than the Green sided layer usually associated with marine plywood. Usually not in alot of wet aplications. The full marine grade is designed to be in very wet conditions and is usually used as a backer for fiberglass applications as well. Marine grade plywood is also much stronger than regular ply material due to the glue and the full veneer process being made of full sheets rather than peices. If you are only using one or 2 sheets I would go with the full marine grade. It will last you longer. Remember to seal all screw holes or points of entry and also exposed cut ends properly before covering. This for some reason seems to prolong the life and keeps the water completely out.

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give me a day or so and I can see what ideas I can come up with for you, my wife's uncle knows someone at a boat building place he may be able to get it for you for..it's expensive though, I will give him a call...how much you think you need?

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