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Old 10-10-2013, 11:35 PM   #15
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AlbertaBound's Avatar
1975 Argosy 28
1975 Argosy 22
1978 Argosy Minuet 6.0 Metre
Camrose , Alberta
Join Date: Aug 2013
Posts: 74
just to confuse things more, here in Alberta bubble wrap is not considered to have any significant R-value and is basically considered very expensive vapour barrier. And as far as the reflective layer it is mostly redundant because your outer shell is already doing just that. If anything have it towards the inside to keep in the heat from your furnace or the cooling from a/c.

I am considering using "styrofold" as I have it left over from my house together with a foil backed insulation. considering using spray foam for the underside but I don't know if it will stand up to the twisting of the frame

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Old 11-16-2013, 01:13 PM   #16
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1969 23' Safari
Blenheim , Ontario
Join Date: Jul 2012
Posts: 151
My 69 had 3-4 inches of factory spray foam in the under carrage. I found that it sucks up water like a sponge and take time to dry out. Led to floor and frame rot where it got wet. But preserved the frame where no water was found. Carpenter ants seem to like building a colonies in it as well. Had to tear it all out to clean and paint the frame for floor replacement. Not a fun job.

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