Foaming a hull
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=19393
Printed Date: November-20-2024 at 12:32pm
Topic: Foaming a hull
Posted By: 8122pbrainard
Subject: Foaming a hull
Date Posted: September-09-2010 at 5:39pm
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This last week when I was up north, I ran into JD (cudas51) and of course talked boats. He's currently restringering a mid 70's Nautique for a customer and I asked him what material costs he had in the boat. When he gave me such a low figure, I commented that he must not have refoamed considering the foam was a major portion of the costs. He said he did foam the boat but let it out what he did. I don't know why I hadn't thought of it but what he did was haul the hull over to a spray foam insulator. The guy had it for about a week and came off a finished job with some leftover foam in the 55 gal. drums. The insulator contractor did the foam for $150.00!!!! Same 2lb. Iso closed cell foam that comes out the the expensive cans or the spray foam expensive kits!! ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Replies:
Posted By: Kristof
Date Posted: September-09-2010 at 6:37pm
Well, it's not about WHAT you know, it's about WHO you know...  ------------- - Gun control means: using BOTH hands! - Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
Posted By: C-Bass
Date Posted: September-09-2010 at 7:06pm
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But how does this figure into the debate of foam vs. no foam.
Pete, would you re-foam even if it were free? ------------- Craig 67 SN 73 SN http://www.correctcraftfan.com/diaries/details.asp?ID=6103" rel="nofollow - 99 Sport 85SN |
Posted By: 8122pbrainard
Date Posted: September-09-2010 at 7:08pm
No!!  I just wanted to throw the option out there to those that do refoam.------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
C-Bass wrote:Posted By: BuffaloBFN
Date Posted: September-09-2010 at 7:42pm
If the sky ever does fall, I'll pick up as many of you as I can!  ------------- http://correctcraftfan.com/diaries/details.asp?ID=2331&sort=&pagenum=12&yrstart=1986&yrend=1990" rel="nofollow - 1988 BFN-sold "It's a Livin' Thing...What a Terrible Thing to Lose" ELO |
Posted By: WakeSlayer
Date Posted: September-11-2010 at 11:10am
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I have thought of this before. I see the Icynene truck on the freeway all the time. Another option, I think, would be foam in place packaging like we use at our office for packing big computer systems. Sealed Air makes a pretty wide variety of products and probably an adequate one for those who elect to refoam. ------------- Mike N 1968 Mustang |
Posted By: eric lavine
Date Posted: September-11-2010 at 11:58am
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the debate continues ------------- "the things you own will start to own you" |
Posted By: gun-driver
Date Posted: September-11-2010 at 4:12pm
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There's nothing good that can come from foaming!!!!
Extra weight, trapped water, ants, rot, mildew...all bad things. |
Posted By: horkn
Date Posted: September-11-2010 at 10:57pm
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Foam will make one thing lighter.... your wallet. ------------- 78 martinique- refloored, reinforced, stringers re glassed, re engineered interior GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
Posted By: Ranger
Date Posted: September-12-2010 at 1:15am
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I would have to agree, nothing good can come from foam in the bottom of a boat. However, if floatation is a must, than spray it all you want under the gunnels, under the bow, whatever, just not in the bottom of a boat.
Just my 2 cents Jeff |
Posted By: eric lavine
Date Posted: September-12-2010 at 12:01pm
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the only foam on a boat should be around your drink holders ------------- "the things you own will start to own you" |
Posted By: dochockey
Date Posted: September-15-2010 at 2:14am
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The foam is just there for flotation? dosent it also act like glue and reinforcement ?
all we need to do is come up with a foam that dosent hold water ------------- 1989 Teal Ski Nautique 1967 Mustang Harris Float Sunfish |
Posted By: storm34
Date Posted: September-15-2010 at 2:34am
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Why not seal all the foam and the place it under the floor?
Something similar to putting plastic over the foam in your seats then putting the skins on. You could place the plastic (other other similar material) in the floor, pour in the foam and then seal the top. Put your wood floor panels down over top, making them removable so you can check/remove the foam if need be. ------------- |
Posted By: 8122pbrainard
Date Posted: September-15-2010 at 8:44am
Use the search set for member UK1979. Roger has done all the water absorbsion tests as well as the plastic wrap idea. The new closed cell foams do not absorb water!!!! How much structural strength foam adds to a hull is up it the air. Early hulls were thick. Later not so and CC may have counted on the added rigidity. Some feel it also adds to sound control. Chris, I'm not in favor of refoaming but if it is done have always pushed injection over pouring. Injected in a cavity, the foam self skins at the outside surface. This makes it very resistant to water. Roger did some testing with the skining factor too. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Waterdog
Date Posted: September-15-2010 at 10:29am
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"What if" foam blocks cut to size, dipped in laytex to seal the block.
Or flip the hull, fill the bow about a foot thick and fill the gunnels under the "lip".? ------------- - waterdog - http://www.correctcraftfan.com/diaries/details.asp?ID=3896&sort=&pagenum=2&yrstart=1978&yrend=1978" rel="nofollow - 78 Ski Tique |
Posted By: 8122pbrainard
Date Posted: September-15-2010 at 10:57am
This is a alternate to foam in the bilge that I've mentioned several times. Flipping is not needed. It's sprayed on. Spraying and injecting foam is actually more common to pouring. Pouring is more of a specialty product that many here use. Lot's of waste with over pouring. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Waterdog
Date Posted: September-15-2010 at 11:11am
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Pete,
I thought if the foam was hanging from the top and it got wet there's more to worry about than wet foam! ------------- - waterdog - http://www.correctcraftfan.com/diaries/details.asp?ID=3896&sort=&pagenum=2&yrstart=1978&yrend=1978" rel="nofollow - 78 Ski Tique |
Posted By: Riley
Date Posted: September-15-2010 at 11:21am
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Whether the foam obsorbs water or not, it still traps water and blocks vetilation. If it's a boat, water finds its way to every spot whether it's under the deck or in the floor. It will be interesting to see how these new houses with the spray foam hold up after some years. Good source for foam though. ------------- |
Posted By: gun-driver
Date Posted: September-15-2010 at 11:30am
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Posted By: GottaSki
Date Posted: September-15-2010 at 11:34am
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When you compare the flotation of the cc foam with other brands, you would see that the CC is over-flotationed, like a Ranger or Whale boat. Cut a big chunk of the hull away with a chain saw and look, it still floats, wow, makes for great ads but its still a dead boat.
Other brands have two strips of foam under the gunnels, some in the bow, and a few strips under the floor about the size of two 2x4x8's each side. This passes USCG positive flotation requirements. Our clubs '68 nautique was in an opposing, glancing collision with another boat (wood) with was a splinterd pile of kindling flotsom. The nautique didn't even spider crack, just a 4' scratch in the gell. I believe cc hulls have 50-100 % thicker glass layups than most similar boats. I maintain they do not need the foam for rigidity or anything else like that. in order to provide viable regidity, the foam would need to be bonded to the bottom of the floor to make a laminate structure, which it is certainly not. If you need mushy foam to make a boat rigid, caveat emptor. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |