Foundation Wall Waterproofing

[dik]

What is the current best practice for this... I don't usually do foundations, but the client has a large pit (not deep) but there is a significant high water table (about 3' below grade). I've designed the pit for buoyancy and he doesn't want to provide perimeter drainage and/or sump.

I used to use a product called 'Blue Stuff' which was great, and I don't know if it's currently available.

What coatings do most people use these days?

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[dik]

Just came across Henry-Bakor Blue Seal waterproofing membrane... looks a lot like 'Blue Stuf'. I think Bakor made 'Blue Stuf'... anyone use it?

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[dik]

Just found it... Blue Stuff by Pennkote... Is there a better product?

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Pmtottawa]

I spec bluesman

https://henry.com/residential-and-light-commercial/foundation-and-below-grade/blueskin-wp200

As well as waterstops at wall to ftg interface when water level is high

 

[jhnblgr]

Mel-Rol membrane

 

[Canuck65]

Typically can't use perimeter drainage and sumps for tank foundations below the water table, the pumps can't keep up with drawing down a water table. Full waterproof under the floor and up the walls. I have used Henry products, including Blueskin sheet membranes often for the walls. There is a different loose laid membrane for the underslab portion that is typically installed on a mudslab before the base slab is poured. Can't recall the specific product name. The underslab membrane is then lapped with the wall membrane for a water tight system.

 

[jayrod12]

HLM5000 by BASF was always our typical below grade waterproofing specification. It's a fabric reinforced roll on product. The contractors don't really like it, mainly because they can't just spray/roll it and be done, but the fabric reinforcing makes a huge difference in our experience.

 

[dik]

Thanks very much, gentlemen (my binary term for PC).

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[dik]

Thanks Canuck... it was an initial concern, but water flow is low in the soil, but an embedded perf pipe fills up. I've gone with a 2' thick concrete pad... and waterproofing.

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[JMASE]

I've found that a bentonite clay waterproofing membrane works well.

https://www.wrmeadows.com/clay-tite-bentonite-waterproofing-membrane/

 

[dik]

I use bentonite rod all the time for waterstops... have for decades... I prefer it to PVC stuff...

-----*****-----
So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik