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Old 03-03-2016, 06:59 PM   #1
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1.5 inch insulation cavity question

Hi folks,

If been lurking for some time, and this place is great. This is my first post.

I have a 1.5 inch cavity between my walls, and I am on the fence about insulation. I live in the northeast, and will winter in New Mexico.

I am completely re-doing the walls, and I have the opportunity to either

a) use reflective aluminum material from atticfoil on both the inside of the frame (facing out) and the outside of the frame (facing in) to create an effective reflective system.

Or

B) install 1.5 inch foam board between the walls and simply go with the anti-conduction route.

Given the space of the cavity (we will not be building out the walls), which system would you all recommend.

Thanks,

Dustin
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Old 03-03-2016, 07:08 PM   #2
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I did both on mine. Reflectex directly on the panels and 3 sheets of 1/2" to fill. Won't match the fancy ($$$) urethane foamed in place stuff but I don't really plan on spending winters in Jackson Hole. Or Canada.
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Old 03-03-2016, 07:32 PM   #3
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I did both on mine. Reflectex directly on the panels and 3 sheets of 1/2" to fill. Won't match the fancy ($$$) urethane foamed in place stuff but I don't really plan on spending winters in Jackson Hole. Or Canada.
Thanks for the reply.

Was it effective? Everything I've read says having an empty air space is a MUST for reflectic sheeting to work.
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Old 03-03-2016, 11:59 PM   #4
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The empty space is in all the bubbles.
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