[Greenbuilding] Waterproofing a shallow frost protected foundation

[Lynelle A. Hamilton]

Many thanks, John. I'd looked at Soprema, but was hesitant as I knew 
nothing about it.

Lynelle

On 07-Apr.-2019 10:35 p.m., john salmen wrote:
>
> If I interpreted this right you have 2” of foam over the nexcem and 
> everything is covered with a waterproofing dimple wrap? And the dimple 
> wrap is not working.
>
> You can use a proper waterproofing membrane over the foam similar to a 
> standard icf foundation – soprema makes a number of roll products that 
> can be used to waterproof (self adhering with primers, etc).  I think 
> the best is a product called colphene icf.
>
> It is true that trying to drain a high water table can be 
> counterproductive (increased flows) – you basically have to build a 
> boat. Membrane waterproofing (soprema type products) are only as good 
> as the installation (corners, seams, etc) – so getting someone skilled 
> with those materials is more important than the material.
>
> If it was just the nexcem I would be tempted to recommend zypex as a 
> cementious cover (less toxic) and very effective. You could look at a 
> zypex stucco type cover with the foam but would probably fail over time.
>
> Best
>
> John
>
> stationdesign
>
> 4465 UPHILL RD DUNCAN
>
> BC V9L6M7 250 246 8541
>
> *From:*Greenbuilding <greenbuilding-bounces at lists.bioenergylists.org> 
> *On Behalf Of *Lynelle A. Hamilton
> *Sent:* April 7, 2019 3:22 PM
> *To:* Green Building <greenbuilding at lists.bioenergylists.org>
> *Subject:* [Greenbuilding] Waterproofing a shallow frost protected 
> foundation
>
> Again, I turn to this list!
>
> I have a shallow frost protected foundation, sitting on a high water 
> table. Construction is SFPF, then Durisol/Nexcem with 2" of foam 
> extending to the perimeter foam and dimple wrap.
>
> We temp back filled the south wall before winter approx 3.5 feet, as 
> the septic is to the south.  Now, I have water coming in on the south 
> wall. Not a huge amount, but enough that I don't want it! We had no 
> water on the ground before backfill, although the seat of the septic 
> tank (about 1.5 feet below the foundation had minor seepage when we 
> dug it.
>
> I've been told not to ring the foundation with gravel and install 
> weeping tile, due to the high water table.  I don't believe I can use 
> tar or other paint on applications with the foam. I can't find 
> anything relevant on the web.
>
> Any ideas, listers? Many thanks in advance.
>
> Lynelle
>
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