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Old 11-04-2019, 10:00 PM   #1
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Exposed Foundation Rigid Foam


Our daughter and S-in-L had a detached garage built. The foundation is insulated with rigid foam as the floor is plumbed for heating at some point in the future. The ground slopes down towards the back and the foam is covered with what I think is cement board and capped with flashing, but across the front, you see the exposed edge of the foam between the garage door thresholds and the gravel driveway. He was wondering if there was a way to protect or cover this. I couldn't think of anything, other than to pull the gravel back and cut off the top inch or two then backfill with gravel.
Any other thoughts? Sorry, I forgot to take pics and it's 3 hours away.


TIA as always.
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Old 11-04-2019, 10:11 PM   #2
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Re: Exposed Foundation Rigid Foam


Most I have seen is the top 3" is cut away when the concrete driveway is put in. You would like to keep the water out from between the floor and the foam which is still tricky when doing a concrete driveway.
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Old 11-05-2019, 06:22 AM   #3
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Re: Exposed Foundation Rigid Foam


Modified steel studs or aluminum flashings usually used around roof? Eternabond tape sticks to concrete when primed.
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Old 11-05-2019, 05:45 PM   #4
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Re: Exposed Foundation Rigid Foam


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Originally Posted by carpdad View Post
Modified steel studs or aluminum flashings usually used around roof? Eternabond tape sticks to concrete when primed.

Thanks, but I'm not sure if a tape would survive the rigors of being driven over, snowblowing, etc.
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Old 11-05-2019, 06:43 PM   #5
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Re: Exposed Foundation Rigid Foam


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Thanks, but I'm not sure if a tape would survive the rigors of being driven over, snowblowing, etc.
Put the tape on as suggested and protect that with an angle iron bolted to the floor, flat side down on top of foam
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Old 11-05-2019, 07:48 PM   #6
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Re: Exposed Foundation Rigid Foam


Google page plus. Done?
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Old 11-06-2019, 10:43 PM   #7
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Re: Exposed Foundation Rigid Foam


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?????
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Old 11-07-2019, 05:02 AM   #8
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Re: Exposed Foundation Rigid Foam


I wasn't even imagining the entrance. I'm thinking, if that was my garage, I'd dig out 2" or so of insulation and fill with more solid material? Cold asphalt patch (with cement sprinkled on top) or concrete patch.
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Old 11-07-2019, 08:14 AM   #9
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Re: Exposed Foundation Rigid Foam


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I wasn't even imagining the entrance. I'm thinking, if that was my garage, I'd dig out 2" or so of insulation and fill with more solid material? Cold asphalt patch (with cement sprinkled on top) or concrete patch.

That's sort of what I was thinking. I should have had the presence of mind to take some pics, but imagine standing at the main garage door - look down, and you will see the front edge/threshold of the concrete floor, then the top 2" edge of the rigid foam then driveway gravel (which will never be paved in the foreseeable future). With an uninsulated foundation, you would just see the concrete meeting the gravel.
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