foundation waterproof

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Forum topic by Eric posted 07-14-2013 03:41 PM 807 views 0 times favorited 1 reply Add to Favorites Watch
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221 posts in 2511 days

07-14-2013 03:41 PM

I recently installed a french drain at the footer of my foundation. I would like to raise the grade around the house to direct rainwater away. I have two questions.

1) my grading will start anfew inches above the foam insulation board. Do I need to tar the bare foundation in that areea for a few inches of soil?

2) I realize it may not do much.. but its not going to hurt to caulk the gap where the foam insulation board meets the Foundation. Whould silicon or a tube of roofers friend work better?

-- Eric

1 reply so far

View NoLongerHere's profile


893 posts in 2676 days

#1 posted 07-27-2013 12:01 PM

no replies huh?

kind of a an odd question for this sight. Some would say try Refurbers but I’ll make a comment if it helps.

First, I’m a little concerned that you plan to bring the dirt any closer to that window sill. You might have to install a window well with a drain and gravel.

The foam is really ugly and seems awfully high based on that window. Could it be cut down 12”? It doesn’t need to be that high above the surface. Caulking the foam to the wall won’t seal it and just makes a mess and is waste of time. It’s better to bury it and let any water travel to the bottom sump drain pipe.

As far as coating the concrete, the black tar looks terrible if it shows. Most foundations are bare concrete above ground and the tar stops about a foot below the ground. It won’t hurt to have some bare concrete below grade.

hope this helps, have fun.

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