I saw a complete gut and renovation going on over the weekend. This is a two story, probably century old house with a mansard roof for the third story in a coastal area. The siding was gone, interior looked gutted and no windows in yet. The house was covered in black, what- I-thought was building paper.
As I drove closer and got a better look, the “building paper” was actually Ice and Water shield . . . covering the whole house. Is this going to cause a vapor problem? I would think it will cut down on drafts.
Any thoughts?
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I & W shield is a wrong side vapor barrier. If you cover a roof in it, you must make sure the roof is vented properly to avoid any issues. Wrapping a house in it is outright wrong.
"I & W shield is a wrong side vapor barrier."Now do you know? No hint of his location given.And you don't know where or what type of insulation is going to be used.Do some research on PERSIST construction. It has been discussed here in the past.I don't know if that is what they are going for are not..
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
You are correct. I was thinking specific to my region, which is the northeast.I have never heard of PERSIST construction.
PERSIST can work in just about any climate.
Use 2" or more polyiso insulation on the outside of the I&W shield. No insulation in the walls.
The framing stays at room temperature / humidity - just like furniture in the house. All the moisture / condensation issues are on the outside of the I&W shiled.
The house is on Block Island, Rhode Island. Very breezy year 'round. Tough coastal envoirnment. Maybe Mike Smith will weigh in on this.