1911
chupacabra
- Thread starter
- #321
Epro is a great product, that is what we use as a base for waterproofing below grade for foundations.
It gets sprayed on by the installer/applicator. Never used roll on in our projects.
My worry with the 10Mil poly would be a small rock or something sharp that gets to puncture the poly in the back fill process.
It's thick poly but who ever is doing the back fill must pay super special attention to soil being placed on the poly.
That is why we use the delta drain mat.
Remember that the fill will settle unless you do compaction.
When you have back filled with the 1' of fill try to create some slope so that poly would shed water.
Would use some birds eye gravel 3-4 inches on top of the poly so it would become free draining.
Then 20' wide commercial filter cloth then the soil.
Went trough my Fine Home Building magazines . Issue No 2 April May 1981 (yes I still have the magazines) there is a good article
on waterproofing Earth Sheltered Houses by Charles A Lane. Little dated but all the principals are still relevant today. Its a good read.
Can take pictures and forward if you like.
Hope that helps.
Thanks Rugy. We will make a slope on the back side to drain water away from the house. Also putting another french drain all along inside the front parapet wall to move water away from the front of the back fill. We are also using a rotating drum sieve to screen-out rocks from the soil, so the first layers over the poly sheeting will not have rocks to punch through it. The gravel and the filter cloth are good ideas too, will try to incorporate those if we can afford it.