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 Insulation		  New Topic  Topic Locked
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River Harley
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132 Posts
Initially Posted - 12/02/2003 :  20:01:08  Show Profile
Can anyone recommend an insulation material for the cabin interior? My boat is equipped with a propane heater, however, efficiency could be greatly increased if the boat were better insulated. A material that is aesthetically appealing would be nice too.

River Harley
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Oscar
Master Marine Consultant

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USA
2030 Posts
Response Posted - 12/04/2003 :  11:23:28  Show Profile  Visit Oscar's Homepage
What model boat are we talking here? Your profile is silent....

Oscar, in SFO making bu's.....
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River Harley
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132 Posts
Response Posted - 12/04/2003 :  18:56:29  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Oscar</i>
<br />What model boat are we talking here? Your profile is silent....

Oscar, in SFO making bu's.....


I have a 250 WK.


<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
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Bubba
Admiral

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USA
542 Posts
Response Posted - 12/04/2003 :  21:40:50  Show Profile
Some random thoughts:
The only parts of my 250 WK cabin that are actually single-layer are the windows and hatches. The hull has an inner liner, creating a thin trapped air space, there's the cabin sole above the bilge, the cabin top has a plywood core and something else, and there's trapped air space beteewn the cockpit and the aft berth (Oscar's MRI chamber). Granted it's not much insulation, but should provide some...

You might want to first focus on shades for the windows, and something that covers the companionway and forward hatch to see if that makes any difference.

You won't want to insulate with anything that absorbs or traps moisture. Keeping the interior simple can reduce mildew problems. I also wonder how much propane you can buy with the money you'd spend insulating the cabin...
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Chip Hunt
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120 Posts
Response Posted - 12/04/2003 :  23:04:38  Show Profile
i think it would be a heck of alot easier and more practical to insulate your body than it would be to insulate the interior of a c250.
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jkey6
1st Mate

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71 Posts
Response Posted - 12/05/2003 :  15:27:02  Show Profile
Wild card chance, but you might be able to blow loose fill insulation into the cavity between the liner and the hull.

Not sure what disadvantages there might be - condensation within the cavity could still wick out since the loose fill would be non absorptive fiberglass...

JKEY
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Oscar
Master Marine Consultant

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USA
2030 Posts
Response Posted - 12/05/2003 :  17:52:54  Show Profile  Visit Oscar's Homepage
I guess you could foam in goop here and there, however, with massive effort you would get 50-60% of the boat, and it wouldn't help much, and you'd have a lot of holes, and a potential moisture problem. So, polar expeditions in a 250 are not recommended. (I tried, sort of).

There is one place where a lot of heat is lost, and that's the forward edge of the pop-top. I roll up a towel and stuff it in there. Guess you could make something fancy for that.

Another issue is the moisture released with the combustion of propane....condensation is bad with people below and ambient in the forties or below, let alone with a massive moisture source....I use an electric heater (shore power dependent of course)in dock. To go out I warm the cabin up as much as possible, go sailing with the oil lamp on, and then plug in again on the other end. If you want to anchor I guess you could get a super silent Honda generator and do the same.....

There are also more sophisticated boat heaters that get their combustion air from outside, and then exhaust outside, heating the interior air through a heat exchanger.

Guess what I'm trying to say is that insulating is difficult if not impossible at this stage, but that there are better heating $olution$ out there.

Oscar
250WB#618 Lady Kay on the Chesapeake
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.