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How Much Attic Insulation Do I Need?

  • Transcript

    LESLIE: Steve in Missouri is on the line and needs some help with an insulation situation. I just like rhyming.

    What’s going on, Steve? How can we help you today?

    STEVE: I have a 22-year-old house and it has that pink fiberglass insulation up there. It’s blown-in and it’s probably an average of 12 inches deep right now. It’s kind of settled down quite a bit and I was wondering if there was a product that would be better than that that I could put on top of it? Or should you put something different on top of it? And how deep should it be?

    TOM: Well, 12 inches is a substantial amount of insulation but actually, today, we would recommend closer to 18 to 22 inches. So, what you could do is on top of the blown-in, you could add some additional blown-in or some fiberglass batts laid perpendicular to the ceiling joists, so to speak, so that you pick up some additional insulation.

    STEVE: OK.

    TOM: The new batts, though, you might want to make sure that they’re not – they do not have a vapor barrier attached. It’s just a raw fiberglass batt.

    STEVE: OK.

    TOM: And that will bring you up to what’s considered the sort of the normal standard for an energy-efficient house today.

    STEVE: Alright. Well, I sure appreciate it.

    TOM: Good luck with that project. Thanks so much for calling at 888-MONEY-PIT.

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