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The Water Cooler
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Best home insulation?
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<blockquote data-quote="doctorjj" data-source="post: 3230172" data-attributes="member: 7292"><p>Spray foam is the only way to go. I’ve done a ton of research on this. I would cathedralize the attic. Make sure you use closed cell or a vapor barrier in the attic. I personally would go with closed cell in the cathedralized portion. Open cell in the walls is fine. If you go staggered stud, there is no reason for foam panels on the outside and they would actually probably be a bad idea as the wall can’t dry to the inside or the outside then. With staggered studs you don’t have to worry about thermal bridging so the rigid foam outside isn’t necessary. And you will also want a whole home energy and humidity recovery ventilation system. I would highly recommend getting a blower door test done before you button everything up. That’s more important than the insulation.</p></blockquote><p></p>
[QUOTE="doctorjj, post: 3230172, member: 7292"] Spray foam is the only way to go. I’ve done a ton of research on this. I would cathedralize the attic. Make sure you use closed cell or a vapor barrier in the attic. I personally would go with closed cell in the cathedralized portion. Open cell in the walls is fine. If you go staggered stud, there is no reason for foam panels on the outside and they would actually probably be a bad idea as the wall can’t dry to the inside or the outside then. With staggered studs you don’t have to worry about thermal bridging so the rigid foam outside isn’t necessary. And you will also want a whole home energy and humidity recovery ventilation system. I would highly recommend getting a blower door test done before you button everything up. That’s more important than the insulation. [/QUOTE]
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