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Old 30-09-2011, 22:49   #1
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What's this 'Stuff' Called ? - Builder Knowledge

And is it still available? Does it have a brand name?

Basically, it's a 1/2" foam sheet with chopped glass blown over both sides about 1/16" thick. It is used as a bulkhead between my transom and rear quarters/engine room and is tabbed in.

I would like to buy some more to install two more bulkheads up forward in the sail loft. The boat is not a racer anymore so I'm turing the loft into storage.

This 4" paneling drop is very light but very strong and only weighs 35 grams. I'd like to keep the displacement of the boat as light as possible, with this additional interior construction.


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Old 01-10-2011, 00:30   #2
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Re: What's this stuff called? - Builder knowledge.

These guys make a glass reinforced foam panel suitable for what you are doing: Coosa Composites, LLC - Manufacture of high-density, fiberglass-reinforced polyurethane foam panels
It's not exactly like your sample but it might do the job for you.
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Old 01-10-2011, 00:35   #3
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Re: What's this stuff called? - Builder knowledge.

Here's another company to look at: Water Resistant, Fiberglass Reinforced Composites | Stringers and Transoms | RV Repair | Boat | Flooring | Plywood Replacement | Marine Bulkheads
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Old 01-10-2011, 10:25   #4
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Re: What's this stuff called? - Builder knowledge.

Quote:
Originally Posted by HopCar View Post
These guys make a glass reinforced foam panel suitable for what you are doing: Coosa Composites, LLC - Manufacture of high-density, fiberglass-reinforced polyurethane foam panels
It's not exactly like your sample but it might do the job for you.
Hummmm! 61% lighter then plywood. I'll have to give'm a call and see what the stuff costs.
For the amount I need it might be worth trying to make my own. I'll have to weight out the material and tooling difference.

I'm hoping for a distributor on this side of the Island. Shipping these days is getting out of hand. Sometimes the shipping cost more then the product.
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Old 01-10-2011, 10:55   #5
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Re: What's this 'Stuff' Called ? - Builder Knowledge

I've used vast quantities of Coosa board repairing boats. It is the good stuff. It's only drawback is that it wont hold a fastener, but then neither does any other core material except ply. Cost is comparable to marine ply.
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Old 01-10-2011, 11:15   #6
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Re: What's this 'Stuff' Called ? - Builder Knowledge

I have a few sheets of 3/4 Balsa core marine "plywood". It is unbendable and very light. But mine has no fiberglass on it. Sure that wasnt glassed after?
How much do you need? I'm north of Seattle...
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Old 01-10-2011, 12:29   #7
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Re: What's this 'Stuff' Called ? - Builder Knowledge

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I have a few sheets of 3/4 Balsa core marine "plywood". It is unbendable and very light. But mine has no fiberglass on it. Sure that wasnt glassed after?
How much do you need? I'm north of Seattle...
If it has no glass over it how's it held together, or is it long grain?
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Old 01-10-2011, 12:32   #8
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Re: What's this 'Stuff' Called ? - Builder Knowledge

Quote:
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I've used vast quantities of Coosa board repairing boats. It is the good stuff. It's only drawback is that it wont hold a fastener, but then neither does any other core material except ply. Cost is comparable to marine ply.
And neither does this stuff. You have to bolt thru unless it's a very light attachment.
I wonder if there is a West Coast distributor?
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Old 01-10-2011, 12:36   #9
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Re: What's this 'Stuff' Called ? - Builder Knowledge

It's veneered on both sides with some kind of blonde looking mahoghany/ phillipine stuff. I looked on line once, it sells for $150-200 a sheet if I remember right. Great for lightweight bulkheads for racing boats I suppose. Anyway, if you dont need too much I can fix you up at no cost.
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Old 01-10-2011, 13:37   #10
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Re: What's this 'Stuff' Called ? - Builder Knowledge

We get ours at Fisheries.
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Old 01-10-2011, 18:05   #11
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Re: What's this 'Stuff' Called ? - Builder Knowledge

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Originally Posted by Cheechako View Post
It's veneered on both sides with some kind of blonde looking mahoghany/ phillipine stuff. I looked on line once, it sells for $150-200 a sheet if I remember right. Great for lightweight bulkheads for racing boats I suppose. Anyway, if you dont need too much I can fix you up at no cost.
I'd planed on covering this stuff with door panels for the wood look but if this is already mahogany laminated it could work out for me. The bulkheads I'm doing are not structural, just dividers.

I'll PM you.

Minaret,

Thanks! Fisheries is my main chandlery.
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Old 01-10-2011, 19:00   #12
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Re: What's this 'Stuff' Called ? - Builder Knowledge

the cover/veneer is likely some sort of white phillipine, fairly open grain (maybe for glueing?) Maybe even basswood..?You would likely want to cover it although I did stain and varnish some once... it took a lot to fill it in good...
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