DayDreamer
Member
Posts: 48
Likes: 9
1955 Aljoa & 1960 Oasis
Currently Offline
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Post by DayDreamer on Jul 21, 2021 8:29:06 GMT -8
If the foam is tight, you shouldn't need a vapor barrier. Cut it just a bit bigger than the space and it should squeeze right in. In areas with Refectix, you can tape at the seams. NOTE: I cut mine with a small jigsaw. It makes a horrible mess but is very accurate. Talk about little cruddlies EVERYWHERE... Use a multitool to trim out for wiring; makes great grooves and fun too! Good to know a vapor barrier is not always needed. I’m curious why is that, obviously it’s something to do with air space?
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Post by vikx on Jul 21, 2021 20:16:51 GMT -8
Styrofoam makes it's own barrier if the fit is tight. It also has vapor material on one or both sides... Some of my trailers had vapor barriers, others didn't. No reason why.
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Post by wisconsinjoe on Aug 9, 2021 8:42:40 GMT -8
About those jig saw blades that a member suggested. Bosch makes a knife blade that works perfectly. No mess cutting. Game changer.
Vapor barriers seem necessary because they are meant for house construction which is way more drafty than a sealed aluminum barrier on a camper. Plus,they only work well if there is a way for the water to get out. Therefore a "rain screen" is needed behind a wall sheathing.
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