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Reflective Weather Barrier


Garet
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This is on a bank owned shell about 4 years old, exterior mostly installed, electric installed, but otherwise it's just studs inside. Exterior has a

reflective material used as a weather barrier under vinyl siding. Same

material was used on the bottom of the roof sheathing. Looks like a

woven material with a foil coating? I found no markings on either side.

Any idea what this is? Is it listed for use as a weather resistant

barrier? If so, is it supposed to be sealed with UL-181 tape instead of

lapped shingle-fashion?

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Often used on roof decking with the reflective side faced down to mitigate the radiant mode of heat transfer. I haven't seen it used on sheathing in these parts. I wonder if it has an acceptable perm rating for that application.

Marc

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