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Old 04-11-2020, 10:24 AM   #1
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Best Insulation Install


We live in Long Island NY. So we get all 4 seasons. Winters can be very cold but seems like they are getting less cold year after year. Anyway, we are gutting our new house so I have some questions.

1. We should always out insulation in the walls that have one side as the exterior? Guess this is fairly obvious.
2. What insulation rating is best for the exterior walls?
3. Any special type of insulation or brand for the exterior walls? Batts are fine?
4. For the attic whats the best insulation to lay, batts or blown?
5. Any special considerations to take into account when installing insulation in the attic?

Thank you very much.
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Old 04-11-2020, 11:09 AM   #2
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Re: Best Insulation Install


All new houses are built with 2x6 exterior walls for the insulation value. Air sealing is more important than the type of insulation.
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https://www.fema.gov/media-library-d...6/chapter7.pdf
figure 7-14
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Old 04-11-2020, 11:12 AM   #3
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Re: Best Insulation Install


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Originally Posted by Nealtw View Post
All new houses are built with 2x6 exterior walls for the insulation value. Air sealing is more important than the type of insulation.
Thank you. How is air sealing done?
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Old 04-11-2020, 11:21 AM   #4
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Re: Best Insulation Install


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Originally Posted by Mstrlucky74 View Post
Thank you. How is air sealing done?
Up here we do a complete vapour barrier behind the drywall and many places that is not done. then the drywall want to be sealed to the walls and all electrical fixtures want to be exterior wall fixtures boxes with a gasket and every hole from the house to the attic has to be sealed tight before insulation up there.

So you want to know what is code or normal for NY.
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Do not use flat bottom gables with scissor trusses.
https://www.fema.gov/media-library-d...6/chapter7.pdf
figure 7-14
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