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How did Correct Craft install foam on 78 SN

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    Posted: October-05-2019 at 7:23am
I have had a play with the foam.. some things I did on my 78 SN pages 2 and 7 you may consider should you go with foam on your build, I found cheap DPM used in concrete floors works well as it will shrink around the foam once the foam has set with a cheap heat gun.    

Good luck with it and thanks for saving a Gen 2 SN
Roger
Lets have a go
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: October-05-2019 at 3:00am
Boy, it has been nearly 30 years since I carpeted my 78, I don't remember anything looking like the pictures you have. I just pealed the old carpet out cleaned the flooring spread the glue and installed new carpet.   It turned out great and still looked great when we sold it several years later.   I think we were about 1,000 hours at that point, sold it at 1,500 hours.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 5:17pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JoeinNY Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 5:13pm
Originally posted by 8122pbrainard 8122pbrainard wrote:


Understand that many do go no foam and plywood and that's an option. If you do go foam, I actually prefer going with plywood and injecting the foam. When the foam is injected into a sealed cavity, the outside surfaces of the foam form a skin without the tiny air pockets (cells). This skin is an added barrier to water compared to the cut surface foam that opens the cells.


I dunno Pete - I still see no evidence of the wood over foam method being anything other than the worst of both worlds.   Heaviest, most expensive, and most likely to rot. Maybe slightly easier/faster than foaming/cutting/glassing if you don't spend much time fitting the plywood panels - maybe slightly safer than wood with no foam. Having some skin to keep some water out seems like it is a non factor where that skin either would be either be a cut surface that is filled by resin/cloth or where the foam wouldnt exist under plywood to get wet anyway.   By far the most rotten falling apart piece of crap boats I have ever torn into were plywood floors with foam injected under them.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 4:22pm
Originally posted by Evilsizer Evilsizer wrote:

8122 what's this injected foam you speak of

Andrew,
Understand that many do go no foam and plywood and that's an option. If you do go foam, I actually prefer going with plywood and injecting the foam. When the foam is injected into a sealed cavity, the outside surfaces of the foam form a skin without the tiny air pockets (cells). This skin is an added barrier to water compared to the cut surface foam that opens the cells.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:50pm
Could I put down a piece of plywood with wax paper on the bottom side. Drill the holes and pour the foam then remove the plywood. I think the wax paper will keep the foam from sticking and then it will be flat
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:47pm
8122 what's this injected foam you speak of
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:46pm
So what's you advise? Wood floors or go back to foam and glass
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:45pm
Ya its mobile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:44pm
Originally posted by Evilsizer Evilsizer wrote:

I cant post pics. I have tried. Even gone to the top of this thread like people say.

Andrew,
What are you trying to use? Mobile devices don't work.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:42pm
I cant post pics. I have tried. Even gone to the top of this thread like people say.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MourningWood Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:22pm
When I visited the CC factory in 1983, I was amazed to see the open hulls, with the foam poured and hardened in place, outside the shop.
Workers were sawing the foam 'flat' with hand saws before going back inside for the glass-over 'hard' floor. The foam chunks were tossed into a dumpster.
Seemed somewhat 'primitive' to me, even by 1983 standards...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRBenj Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 3:03pm
Originally posted by MrMcD MrMcD wrote:

I owned a 1978 Nautique, In about 1986 I put new carpet in that boat. My carpet installed over a wood floor front to back.
Mark

It wasn’t built that way at the factory.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 2:43pm
Andrew,
How about posting some pictures of your project?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 2:17pm
Originally posted by Evilsizer Evilsizer wrote:

Did they por it and then shave it down flat with something? Then glass it?


Originally posted by 8122pbrainard 8122pbrainard wrote:

I'd say they didn't pour but rather use plural equipment. Ether way, after the foam cured it would be sawn flat.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote MrMcD Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 2:06pm
I owned a 1978 Nautique, In about 1986 I put new carpet in that boat. My carpet installed over a wood floor front to back.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 1:50pm
Yes I have looked. I have not seen any examples of glossing over the foam for the floor like Correct Craft did. Did they por it and then shave it down flat with something? Then glass it?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 1:48pm
I'd say they didn't pour but rather use plural equipment. Ether way, after the foam cured it would be sawn flat.

Also
Originally posted by 8122pbrainard 8122pbrainard wrote:

Andrew,
Have you looked at any of the great stringer threads linked in the FAQ thread? Pictures too! .


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Evilsizer Quote  Post ReplyReply Direct Link To This Post Posted: October-04-2019 at 1:39pm
Hey experts! I have a 78 SN I'm doing a stringer project on. In my boat they just fiberglassed over the foam to make the floor. There is wood up front under the bolted down seats and ski pylon. How did Correct Craft pour the foam in flat to then just glass over it?
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