Spray foam insulation

Fresh & Waste Water Systems, Climate Control, etc.
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Spray foam insulation

Postby MarinetteBud » Thu Oct 13, 2016 3:25 am

I wondered if anyone has used a two part urethane closed cell spray foam insulation in the walls and cabin ceiling area. It seems to me it would be a great way to prevent sweating and condensation behind the cover panels. I would not attempt to spray any in the bilge area or any area that is visible.
All 3 of my Marinettes had while block foam laying inside the walls, ceiling, and some in the bilge area. None of the blocks were cut to size or "tight fitting"....so I thought spraying foam would seal the entire surface and keep moisture away from the metal and eliminate condensation.

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Re: Spray foam insulation

Postby ukester » Thu Oct 13, 2016 7:53 am

sprayed the ceiling throuhout the entire boat-very very messy but it did the job
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Re: Spray foam insulation

Postby jralbert » Thu Oct 13, 2016 4:40 pm

a) some spray foams will absorb and hold moisture so if you do it, make sure you use a foam that is dense enough to repel water - check the Loctite and Great Foam customer support people. b) there 's a highly regarded and relatively inexpensive product called Reflectix that other Masrinette owners have successfully used. Closed air cells (like packing bubbles) plus a heat reflecting surface are the key construction items for this product. Easy to use. It has the advantage of being removable so if you ever need access to the space to say, run wires, pipes, you can do it without cutting chunks of hard foam. It also gives you visibility when you need it to spot corrosion problems.
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Re: Spray foam insulation

Postby Fastjeff » Sat Oct 15, 2016 5:44 am

Having spent many nights on mine--summer and winter--I can attest that aluminum boats are great conductors of heat and need all the insulation they can get!

"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

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Re: Spray foam insulation

Postby Brucew633 » Sat Oct 15, 2016 12:50 pm

I have checked with the manufacturer of Lizard skin for automotive industry. They have a marine industry also . The website is mascoat.com. The product is designed for the marine environment. They have bath sound proof and insulation products. Price is comparable to n the expanding foam.

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Re: Spray foam insulation

Postby martindesign » Sat Oct 15, 2016 9:42 pm

Lizard skin is good stuff! We use it in alot of builds.
Machanic, fabricator, carpenter, plumber, electrician, designer, hotrod builder and glutton for punishment. :ugeek: current boat; 1969 Marinette 32 express bridge 440's
Catawba Oh