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Go Back   SailNet Community > On Board > Gear & Maintenance > Insulation?
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Thread: Insulation? Reply to Thread
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Topic Review (Newest First)
01-29-2009 12:06 AM
billyruffn
Rambling on a cold winter night

Quote:
Originally Posted by deniseO30 View Post
Honestly.. by the time the toxic fumes from the foam hit you.. wouldn't you already be dead? Or at least off the boat? Just some thoughts of my own
Denise, the idea is avoid being dead!! As for being "off the boat".....it's kinda hard offshore, but I guess that's what the life raft is for. But then launching a raft during a fire is complicated by the wind putting the smoke where you'd normally launch the raft (lee side). Flamable insulation is just a necessary evil, I guess.

I remember what a crusty old Chief told into me in the Navy: "Sir, a fire at sea can ruin your entire day. Best to avoid them altogether, but if you have to have one, keep it small and kill it quick." I only experienced one fire at sea. It was small, but really scary. I was truly imazed at how rapidly the smoke filled the spaces and how hot the steel bulkheads got.
01-28-2009 11:50 PM
T37Chef Has anyone tried this stuff

ARMAFLEX http://www.armacell.com/www/armacell...e?OpenDocument
01-28-2009 11:33 PM
T37Chef Thanks for the link, I'll check it out
01-27-2009 04:41 PM
mitiempo
insulation

there is an insulation called "armaflex" that is fire resistant - installation on boats is covered in the "plastic classic" forum.
01-27-2009 01:32 PM
ArgleBargle
Astro-foil

we go out a lot in winter in british columbia.

I make limited use of "astro-foil" - an air filled polyethylene bubble between two reflective foil layers. It is light, thin, easily cut, can be used indoors or out, water resistant, cheap, easy to work with and has both reflective and conductive insulating properties.

I dont use it anywhere that fire might be an issue.

I found it at a local hardware store where they were selling it mostly as additional insulation for hot hater heaters.

see it at, eg:

ASTRO-FOIL - Reflects Heat - Stops Air Infiltration - Acts as Vapor Barrier
01-27-2009 01:07 PM
T37Chef
Quote:
Originally Posted by Cruisingdad View Post
Like I said, they do make a fire resistant foam. I just do not think I would go to the expense. For wire rins, you could spend a few extra bucks and run the wiring through UV elec grade PVC conduit (the gray stuff). It is also available at home depot. But just being honest, I would not.

Brian
Ain't got no wires & stuff up there anyways, but good idea.

I'm curious about the ABYC question.
01-27-2009 01:03 PM
Cruisingdad Anyone know the ABYC rules on this?

Brian
01-27-2009 01:02 PM
Cruisingdad Like I said, they do make a fire resistant foam. I just do not think I would go to the expense. For wire rins, you could spend a few extra bucks and run the wiring through UV elec grade PVC conduit (the gray stuff). It is also available at home depot. But just being honest, I would not.

Brian
01-27-2009 12:36 PM
T37Chef Thanks for all the input, I'm liking CD's recommendation, especially the $$ factor

JRP, I wonder if the spray on stuff the Navy has experimented with is similar to what they sprayed on my trucks bed? Rhino or Line X type?
01-27-2009 12:18 PM
JohnRPollard While T37Chef will probably be okay with some sort of off-the-shelf insulation board, I'm going to disagree a bit about whether the fire/fume hazard from certain insulations is a big deal or not.

Over the years, I've read several accounts describing smoldering insulation fires that forced abandonment of the boat because the toxicity of the fumes was overwhelming, making it impossible to combat what would otherwise have been a manageable fire.

We tend to read about these incidents in connection with insulated metal boats, but some insulated fiberglass boats are also vulnerable. Builders of metal boats always face a dilemma as they decide on how/whether to insulate their hulls (besides the thermal and acoustic qualities, proper insulation can minimize the corrosive effects of condensation on the interior of steel hulls.) Most opt for insulation, since the benefits generally outweighing the risks, but as BillyR mentioned they live with the nagging worry about fire (especially insidious electrical fires from wire runs through the insulation).

The U.S. Navy recently (within the past few years) developed and tested a new foam insulation that is supposed to be non-flammable/non-toxic. I think it was spray-on, but I'm not positive of that. I don't know whether it has trickled into the market yet.
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