Using spray foam in nooks

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Old 09-29-17, 08:52 AM
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Question Using spray foam in nooks

I'm currently working on insulating a van and I would like to use spray foam insulation but I'm having trouble applying it properly in the nooks of the van (specifically the ceiling crossbeams).

It is my understanding that the foam should be applied in layers in order for it to properly settle but since I can't see inside the crossbeams the only thing I can think of is to fill up the hole until I see the foam and then remove any excess once it dries but I'm not sure that's the correct way.

Are their any better ways of doing that? Thanks
 
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Old 09-29-17, 09:57 AM
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Not much else you can do but fill and trim.

BTW, if using an aerosol type (great stuff) foam it's an open cell foam and water can get trapped and start rust.

Would be much better off using a polyurethane closed cell foam!
 
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Old 09-29-17, 08:09 PM
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Welcome to the forums.

I found out the hard way with my 99 Ford van that expanding foam can be a bad thing. If you use a spray foam.... make sure it's no expanding or minimally expanding. I actually buckled the side panels of my van with the foam. What a job to remove the foam.

For my roof.... I glued up sheets of foam between the roof ribs. Covered them with 1/4" plywood and rug. I was afraid to use the spray foam inside the small rib section.
 
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Old 09-29-17, 11:46 PM
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You can drill small holes just big enough for the fill tube and use window and door minimally expanding foam. I did my garage door after filling the big open spaces with iso panels. You'll still get quite a bit of heat through where the ribs join the skin, but its better than leaving it all open. Second best would be to create closed air filled voids between the places you can fill easily.

Making a camper/tiny home/travel/sleep van?
 
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Old 10-02-17, 08:21 AM
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BTW, if using an aerosol type (great stuff) foam it's an open cell foam and water can get trapped and start rust.
I read that Great Stuff is supposed to be closed-cell. Didn't see the information on their website but on other sites reviewing it so it might be wrong.

I found out the hard way with my 99 Ford van that expanding foam can be a bad thing. If you use a spray foam.... make sure it's no expanding or minimally expanding. I actually buckled the side panels of my van with the foam. What a job to remove the foam.
Sorry to hear that. I guess I'll have to go at it slowly

Making a camper/tiny home/travel/sleep van?
Yup, doing campervan conversion on a Nissan NV2500
 
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