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Old 15-03-2013, 20:28   #1
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Insulation

I have a 1967 Ericson 30' sloop. All of the insulation was torn out when I bought her, I'm trying to decide if I'll use Neoprene or Polyethylene foam sheeting, but the main reason I'm here is my confusion over what to do about the overhead, there were 2" holes drilled all over it to get to the bolts holding down the teak grab bars on top of the cabin (last owner). There is a big gap between the roof and the overhead? Should I use spray foam? Rock wool? The area is almost inaccessible but I think I should cram something up there. I want to use ceiling panels to cover all the holes but still be able to access them in the future. If I have foam ceiling panels on the underside of the overhead, do I need to fill the air gap between the roof and overhead? Any and all advice greatly appreciated.
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Old 15-03-2013, 21:14   #2
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Re: Insulation

You might want to try here, too.

Maintenance & Mechanical
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Old 16-03-2013, 14:43   #3
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Re: Insulation

I'm not sure what you mean, I can't find any similar insulation articles in the Maintenance and Mechanical forum. If you know of a particular thread, let me know. Thanks, Jenny
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Old 16-03-2013, 14:57   #4
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Re: Insulation

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Originally Posted by usmmjenny View Post
I have a 1967 Ericson 30' sloop. All of the insulation was torn out when I bought her, I'm trying to decide if I'll use Neoprene or Polyethylene foam sheeting, but the main reason I'm here is my confusion over what to do about the overhead, there were 2" holes drilled all over it to get to the bolts holding down the teak grab bars on top of the cabin (last owner). There is a big gap between the roof and the overhead? Should I use spray foam? Rock wool? The area is almost inaccessible but I think I should cram something up there. I want to use ceiling panels to cover all the holes but still be able to access them in the future. If I have foam ceiling panels on the underside of the overhead, do I need to fill the air gap between the roof and overhead? Any and all advice greatly appreciated.
A small air gap doesn't sound like a big problem if there is insulation board already above it. Are you trying to keep the A/C in, or the heat out?
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Old 16-03-2013, 15:11   #5
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Re: Insulation

neoprene yoga mats work great,use fast grab builders adhesive to stick to the fiberglass
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Old 16-03-2013, 15:27   #6
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Re: Insulation

That's what I was thinking! Which is why I put "neoprene" But I think I found another packing source of neoprene that might be cheaper than yoga mats, but I'm still looking for yoga mats in bulk, lol. I thought I'd put neoprene on the sides to the waterline, and then rubber backed stick on carpet tiles down to the sole, which is teak I'll leave alone. Also neoprene on the v-berth for extra padding and insulation under the mattresses. Then I'm just not sure what to do with the overhead if anything.
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Old 16-03-2013, 15:30   #7
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Re: Insulation

There isn't any insulation in the overhead at all, the gap is anywhere from 1 to 3 inches.
I think I might spray in some insulation, but would love to have other opinions. I might even just stuff if full of rock wool.
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Old 16-03-2013, 15:36   #8
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Re: Insulation

better than rock wool is recycled plastic bottels in the form of rock wool,only it doesnt absorb moisture,a bit like polyester sleeping bag material,nice and light as well

look on page 155 of my refit thread,some photos of it and the paneling etc
link below

http://www.cruisersforum.com/forums/...rew-59975.html
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Old 16-03-2013, 15:41   #9
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Re: Insulation

I wonder if its flammable. Where is your source?
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Old 16-03-2013, 15:45   #10
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Re: Insulation

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I wonder if its flammable. Where is your source?
no more inflamable than the rest of a fiberglass boat!

i buy it fro b&q a builder merchant similar to wallmart hardware in the uk ,sold as loft insulation
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Old 16-03-2013, 15:53   #11
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Re: Insulation

Your refit link doesn't work. Do you have this in your boat? How well does it work for condensation, insulation, sound, etc.?
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Old 16-03-2013, 15:54   #12
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Re: Insulation

I scored a load of polyethylene foam sheet and installed it on our boat behind the headliner. I then thought about it and the possible condensaton, moisture, mold and wet deck and tore it all out. I'm not sure what the correct path is here.
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Old 16-03-2013, 16:04   #13
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Re: Insulation

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Your refit link doesn't work. Do you have this in your boat? How well does it work for condensation, insulation, sound, etc.?
try the link lower down under my signature,which is the same,but not pasted.

find it works better than on my other boat that has polystyrene sheets against alumilium.

but we only get down to -1celcius here,but a vast inprovement condensation wise than before with nothing
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Old 16-03-2013, 16:09   #14
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Re: Insulation

ARMAFLEX
Armacell - Armaflex

With its exceptional, inbuilt, water vapour barrier Armaflex is particularly effective at preventing moisture ingress and ensuring long term thermal efficiency. The thermal properties of Armaflex will not rapidly deteriorate over time as other insulation materials may and, by keeping moisture as far from the pipe surface as possible, Armaflex reduces the risk of expensive under insulation corrosion.

The in built water vapour of Armaflex comes from its closed cell structure. Armafl ex comprises thousands of interconnected closed cells, each with an inherent resistance to water ingress. As such the vapour barrier of Armaflex cannot be compromised by surface punctures or tears.

In addition Armaflex is dust and fibre free. It will not emit any particles or fibres, even when cut into shapes and fittings.

Armaflex can be easily and cost effectively fabricated into valve and fl ange boxes on site, allowing for the protection of these vulnerable components and the creation of a fully sealed system at signifi cantly reduced cost.

Where industries have specific requirements Armaflex is often available in specialized variants which meet the need. This includes a high temperature Armaflex suitable for use on heating and process lines in excess of 105C. All Armaflex variants are manufactured to the highest levels of quality making Armaflex a product that can truly protect your investment.
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Old 16-03-2013, 16:10   #15
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Re: Insulation

Yeah, I'm not sure either, I'm thinking I would be wise to put something like stuffing, so that it can be easily replaced or washed if it gets moldy, and also to make foam ceiling panels, maybe with all the insulation, a couple of solar vents, then it won't sweat. I've even considered sewing up a custom blanket to fit on the top of the cabin, overkill? It would be easier.
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