I went to their website but didnt see any mention of what they recommend or use for below grade waterproofing. Any ideas?

Well, let's look at their product as a standard EPS product and go that route, I suggest a peel and stick below grade membrance followed by a drainboard of some fashion such as Delta MS or the likes.

Chris,
Why both? Don't you think the membrane is strong enough to retain water?
Is the dimple for assurance? Just curious to the combination.
Cheers!

Chris' suggestion of peel and stick, followed by dimple drain board is the combination that I use all the time. The peel and stick seals the walls, the dimple board provides a hydrostatic break and a vertical drain for ground water. This water is directed to your footer drains and to daylight or to a sump basin. This combination has worked well for me over a period of several years, and we work in very high clay content soils that have poor drainage characteristics, that retains a high water table for extended periods of time.

Not assurance, insurance, and cheap insurance at that. There would be nothing worse than having to re dig a foundation from a leak caused by one of several factors which the drain board can help prevent.

Imagine frost grabbing the peel and stick and pulling it off allowing the spring thaw to run right into the basement
Or grade settling allowing water to sit in a pool around the foundation and slowly work it's way in
Or your backfill guy doesn't see a big rock with sharp edges and it rolls in and cuts the peel and stick creating further issues.

Drain Board is cheap insurance to prevent issues you can't always control.

Wes,

Which dimple drain board do you prefer?  What is the approximate $ cost / sq ft for this material?

I like to use Platon. It works like the dimple board and installs fast, and holds up against excavators.

Just signed up as a member, and I install a product on ICF called Liquid Rubber. It's a spray applied elastomeric emulsion that has no VOC's and it certainly is strong enough for our frigid winter and hot summers here in Alberta. www.liquidrubber.ca

Don't know if others have had this problem, but when I applied both Platon and DMX on my foundation wall last year it expanded greatly when the sun shone on it. The weather was cold when we put it on. It buckled between every set of screws and caused havoc for shingling the parging over the top edge of it. The only section that stayed fairly flat was on one end of the house where, on a warm sunny day, we loosened up the membrane, stretched it out, and refastened it. My experience says put it on when the sun shines on it and has it warmed up real good. And pull it as tight as you can.

Mac;

Did you use the termination strip on the top? And how far below grade did you terminate the Platon?

I will apply peel and stick to top of grade, actually a little higher and than the protection board about 6" below the finish.

I used the trim strip on the DMX but not on the Platon, if I remember correctly. I took the dimple membrane all the way down to and over the footing. I didn't use anything behind it on the foam.

I use Delta clear membrane. It doesn't buckle with changes in temperature.

Arkie6,
I currently use Miradri peel and stick, and Miradrain dimpleboard.
They are part of Carlisle Coatings companies.
I purchase through Enco Materials, who, I believe, have an office in North Little Rock.

Wes,

Thanks for the info.  I'll give Enco a call next week to check on pricing.

Alan

Im trying to find some online links regarding peel and stick and dimpleboards to purchase for my ICF project. I cant find any of the companys you guys have listed online.

IMO, you don't really waterproof a foundation, you resist it some and mostly make sure that there isn't any water pressure outside trying to get in.

I agree JohnR, im trying to find some links to a peel and stick and dimplboard supplier.

I agree JohnR, im trying to find some links to a peel and stick and dimplboard supplier.

If you know the brand of membranes you're thinking of using go to the mfr's websites. You can find either a list of distributors there or a contact form that you can write and ask where to go to buy. How about your TF distributor? He should be able to sell, or direct you, to the products.

Considering freight costs, etc., you may not save $ by buying online.