this post was submitted on 27 Dec 2024
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Best way to insulate attic with full plywood flooring? (lemmy.sdf.org)
submitted 1 week ago by [email protected] to c/[email protected]
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My house entire attic has plywood flooring over the joists/insulation.

It is nailed in and a pain in the ass to remove.

What is the best way to add additional insulation to the attic? I worry the plywood/insulation underneath has a bad r value.

Do I need to take up all the plywood and re insulate the batts? Should I just loose fill on top of the plywood?

Ideally I want to air seal it to but taking the plywood up will be a nightmare.

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[–] [email protected] 1 points 1 week ago

Depends on the size of the building. If you have a large house with a big attic space ... then I'd look for professional help.

If you have just a small house and the attic is 30'x30' or less, I'd just pull up the boards and insulate.

When it comes to questions like this, it's better to do the proper work (even if it's going to be long and hard and complicated) now rather than take a shortcut. If you cheap out on this now, you'll pay way more fixing the problems it will cause a year or two from now.