Coosa

[JAL]

Couple of thoughts/questions,

Does the Coosa board actually absorb epoxy like a wood core does?

How much weight does the plywood core in a transom actually add over a coosa cored transom?

[warthog5]

No the epoxy doesn't go into Coosa like plywood. Remember a tree has pores in it.


Plywood is almost double the weight.

[dcobbett]

What does it cost for enough Coosa to do a transom on a SeaCraft 20?
A local plywood dealer has 4'x8', 3/4 A/B doug fir marine for $80 sheet. Lets say a transom will take about 70% of each sheet, so the ply for that transom will weigh about 105#'s and cost about $160. If Coosa weighs about 1/2 as much as the ply, what's the cost premium to save about 50#'s?

[hermco]

Yes it weighs less, but the major benefit is the fact that it will not absorb water warp or rot. Spend the money now or spend it later...........

[Scott]

Don ...Have you done anything with thus stuff?

Dan .. a 4 x 8 1.5" sheet of the Bluewater 26 ( I guess he heaviest they make ) is a 104 lbs ... The sheet is $563 picked up ... a 5 hour trip for me personally.

The info I have states it is (Bluewater 26) 30% lighter than plywood
The slightly less dense Bluewater 20 Claims 45%

[Scott]

Forgot
The 3/4" Bluewater 26 4x8 was $305 a sheet

[hermco]

We use it or a similar product in the bracket transoms and I have used it on a few transom repairs.

[dcobbett]

Sorry, I wasen't very clear with my numbers. I said
"...a local plywood dealer has 4'x8', 3/4 A/B doug fir marine for $80 sheet". I should have added that it weighs about 75#'s/sheet.

So, in comparison to the Bluewater 1.5" Coosa, the answer to my question may be that the Coosa represents a 43%+/- weight savings, but at a 250% increase ($400+/-) increase in cost. I'm not suggesting one is better than the other, just trying to understand the issues involved with each material.

[warthog5]

We use it or a similar product in the bracket transoms

Penske Board?