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MGO Board (Huber Exacor) for walls of basement garage

user-7061227 | Posted in Green Products and Materials on

In Zone 5 and renovating a house. It will have a two car garage in the basement (three sides underground). I will use 2″ rigid foam on the exterior of the 10″ thick foundation wall (& under slab with permitter break) and 4″ cc on the interior of the foundation walls. Don’t like the idea of paper/sheetrock covering the foam and wonder if using MGO board would be a reasonable idea. I have a sample of the EXACOR product and it seems like a solid product. Any feedback would be helpful. Thanks

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  1. user-2310254 | | #1

    Hi Andy,

    You will want to read Martin's article on insulating basements if you haven't already. It's at

    If it were me, I would install the 2 inches of rigid foam (lower cost reclaimed material) on the interior followed by a 2 by 4 framed wall.

    I was really interested in MGO about 10 years ago as a more robust alternative to drywall. It looks like Huber has resolved the quality issues that plagued the product, but I would check on cost and availability. If it turns out to be pricey but available, you might want to consider installing a band (maybe 3 feet) at the bottom of the wall where water damage is more likely.

  2. charlie_sullivan | | #2

    MGO looks like great stuff. I'd be curious what you learn about cost and availability. The one caution I'd offer is that it's quite a bit heavier than drywall, so factor that into your plans for how to do the work.

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