Foam board compression rating
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Joined: Jan 2010
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From: Bristol, TN.
Foam board compression rating
For those using foam board under their camper, what compression rating are you using? The highest rating I can find in stock is 150 i.e. 15psi, which seems adequate for a 3,000 pound camper. I expect some compression, but that should not be a problem as I only really need about 1". Thoughts?
Cross-Country
Joined: Jan 2022
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I'm using 2" Durofoam Plus with a 16 PSI rating. Based on my math, the 48" x 78" sheet (trimmed to fit the SB) is strong enough to carry just shy of 60k lbs. I've got it sandwiched between two 1/2" plywood sheets and haven't seen an ounce of compression, although we've only had the camper out a couple of times.
Thread Starter
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Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
I'm using 2" Durofoam Plus with a 16 PSI rating. Based on my math, the 48" x 78" sheet (trimmed to fit the SB) is strong enough to carry just shy of 60k lbs. I've got it sandwiched between two 1/2" plywood sheets and haven't seen an ounce of compression, although we've only had the camper out a couple of times.
Laughing Gas
Joined: Mar 2016
Posts: 1,033
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From: Casper, Wyoming
I replied on El Jefe's post about raising the camper height with pictures and an explanation of what I did. My solution would give you an inch that you are looking for. Just giving you something else to think about.
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Joined: Jan 2010
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From: Bristol, TN.
I found it, thanks. At present I have added 2 x 2 to the existing spacer that came on the Laredo from the factory which I have screwed to the bottom of the camper. It works, but I don't like the way it looks and gives me more space between the camper and the roof than I need. I found your post to Jefe and will explore horse mats further at Tractor supply when I am up that way today. I already have a bed mat down. Thanks!
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Pearlwhite94
Ford Inline Six, 200, 250, 4.9L / 300
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Apr 23, 2007 09:34 PM
