I live in a dry area. I want to replace some wood on my boat. Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve

"SteveB" wrote in message
...
I live in a dry area. I want to replace some wood on my boat. Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve


You need the marine when you are doing structural mostly. Supposed to be
there are no voids inside to trap water. My floor lasted 17 years and was
Pressure treated ply with Nautilex vinyl covering.

On Wed, 1 Jul 2009 22:27:47 -0600, "SteveB"
wrote:

Is marine plywood an absolute necessity

Of course it is. Navy, Air Force and Army plywoods just inferior.

If you want the job done right, send the Marines.

On Jul 2, 12:27*am, "SteveB" wrote:
I live in a dry area. *I want to replace some wood on my boat. *Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? *About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve

Marine grade plywood typically has the voids filled as each layer is
added. You see the void filler on normal plywood only on the outside
layers. When I replaced my floor I selected a plywood that was not
pine rather than focusing on marine grade. Right or wrong, I left the
underside unsealed so that it could dry when it got wet. I also
removed the foam and did not refill with foam. The foam traps the
water against the floor. I added drain holes through the stringers.
I boat in SE inland lakes so the flotation is not much of an issue for
me. I have heard as alternatives to the foam, the use of 1 liter soda
bottles with the caps on them as well as cut up sections of those kids
noodles.

On Jul 2, 7:33*am, jamesgangnc wrote:
On Jul 2, 12:27*am, "SteveB" wrote:

I live in a dry area. *I want to replace some wood on my boat. *Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? *About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve

Marine grade plywood typically has the voids filled as each layer is
added. *You see the void filler on normal plywood only on the outside
layers. *When I replaced my floor I selected a plywood that was not
pine rather than focusing on marine grade. *Right or wrong, I left the
underside unsealed so that it could dry when it got wet. *I also
removed the foam and did not refill with foam. *The foam traps the
water against the floor. *I added drain holes through the stringers.
I boat in SE inland lakes so the flotation is not much of an issue for
me. *I have heard as alternatives to the foam, the use of 1 liter soda
bottles with the caps on them as well as cut up sections of those kids
noodles.

When I was considering redoing the floor of by brothers old glastron.
I ripped out what was left of the flooring and was amazed at how much
foam wasn't under there. Yes, just a few little strips of the white
square Styrofoam like stuff.


Not enough to even dink with.

On Thu, 02 Jul 2009 07:52:44 -0400, Wizard of Woodstock
wrote:

On Wed, 1 Jul 2009 22:27:47 -0600, "SteveB"
wrote:

Is marine plywood an absolute necessity

Of course it is. Navy, Air Force and Army plywoods just inferior.

If you want the job done right, send the Marines.

You best watch your mouth, boy!
--
John H

"A government policy to rob Peter to pay Paul can be assured of the support of Paul."
-- George Bernard Shaw

On Thu, 2 Jul 2009 05:33:59 -0700 (PDT), jamesgangnc
wrote:

On Jul 2, 12:27*am, "SteveB" wrote:
I live in a dry area. *I want to replace some wood on my boat. *Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? *About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve

Marine grade plywood typically has the voids filled as each layer is
added. You see the void filler on normal plywood only on the outside
layers. When I replaced my floor I selected a plywood that was not
pine rather than focusing on marine grade. Right or wrong, I left the
underside unsealed so that it could dry when it got wet. I also
removed the foam and did not refill with foam. The foam traps the
water against the floor. I added drain holes through the stringers.
I boat in SE inland lakes so the flotation is not much of an issue for
me. I have heard as alternatives to the foam, the use of 1 liter soda
bottles with the caps on them as well as cut up sections of those kids
noodles.

Hee, hee,,,"Marine grade...has the voids filled.."

WITH WHAT?
--
John H

"A government policy to rob Peter to pay Paul can be assured of the support of Paul."
-- George Bernard Shaw

"Wizard of Woodstock" wrote in message
...
On Wed, 1 Jul 2009 22:27:47 -0600, "SteveB"
wrote:

Is marine plywood an absolute necessity

Of course it is. Navy, Air Force and Army plywoods just inferior.

If you want the job done right, send the Marines.

LOL!

"John...same as yesterday." wrote in message
...
On Thu, 2 Jul 2009 05:33:59 -0700 (PDT), jamesgangnc
wrote:

On Jul 2, 12:27 am, "SteveB" wrote:
I live in a dry area. I want to replace some wood on my boat. Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? About the only time it would get wet would be when it is
outside
and it rains, and we get less than two inches annually.

Steve

Marine grade plywood typically has the voids filled as each layer is
added. You see the void filler on normal plywood only on the outside
layers. When I replaced my floor I selected a plywood that was not
pine rather than focusing on marine grade. Right or wrong, I left the
underside unsealed so that it could dry when it got wet. I also
removed the foam and did not refill with foam. The foam traps the
water against the floor. I added drain holes through the stringers.
I boat in SE inland lakes so the flotation is not much of an issue for
me. I have heard as alternatives to the foam, the use of 1 liter soda
bottles with the caps on them as well as cut up sections of those kids
noodles.

Hee, hee,,,"Marine grade...has the voids filled.."

WITH WHAT?
--
John H

"A government policy to rob Peter to pay Paul can be assured of the
support of Paul."
-- George Bernard Shaw

With wood. Look at the surface of good plywood. You will see the biscuits
they used to fill a defect. Marine uses the same method on inner layers.

On Thu, 2 Jul 2009 05:33:59 -0700 (PDT), jamesgangnc
wrote:

On Jul 2, 12:27Â*am, "SteveB" wrote:
I live in a dry area. Â*I want to replace some wood on my boat. Â*Is marine
plywood an absolute necessity, or would a good grade of sanded one side
suffice? Â*About the only time it would get wet would be when it is outside
and it rains, and we get less than two inches annually.

Steve

Marine grade plywood typically has the voids filled as each layer is
added. You see the void filler on normal plywood only on the outside
layers. When I replaced my floor I selected a plywood that was not
pine rather than focusing on marine grade. Right or wrong, I left the
underside unsealed so that it could dry when it got wet.

Don't know the answer to whether or not to leave the underside
unpainted on a boat floor.
But when I rebuilt an outside porch once with tongue and groove pine I
primed/painted both sides.
Wouldn't believe how fast that floor rotted.
You probably did it right.

--Vic