Well I only have one layer of 1/8" and it is strong enough. Truthfully the spars are close enough that only a puncture is an issue. I insulated with 1 1/2" pink stuff though............I can lay on it but don't advise stepping...... 
Does a second layer of 1/8 in ply make a real difference
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by Miriam C. » Fri Jul 10, 2009 10:26 am
Well I only have one layer of 1/8" and it is strong enough. Truthfully the spars are close enough that only a puncture is an issue. I insulated with 1 1/2" pink stuff though............I can lay on it but don't advise stepping...... “Forgiveness means giving up all hope for a better past.â€
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Miriam C. - our Aunti M
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by kennyrayandersen » Fri Jul 10, 2009 10:04 pm
Miriam C. wrote::cry: Well I only have one layer of 1/8" and it is strong enough. Truthfully the spars are close enough that only a puncture is an issue. I insulated with 1 1/2" pink stuff though............I can lay on it but don't advise stepping......
Like I said, not that you NEED 1/4 -- I was just comparing the strength. IMO the single most common sin in tear building (and we all know that excess is a sin!) is over-building. Truth be told the 1/8 is fine in most cases! So don't feel bad or nothin' Aunty M! -
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