COMMUNITY FORUM

BV004920

07:58PM | 07/14/14
I would like a full description of what Bentonite contains and what it actually is suppose to do. Does it fill cracks in walls and small holes? Is it suppose to fill in everything on the outside of your basement so no water will come in?

BV010442

06:34PM | 02/09/16
I had a waterproofing company come out that I inherited when I purchased my home 3 years ago to inject my basement wall over 10 times with bentonite and there is still water coming in. Now my basement wall is bowing and they want to support it with carbon fiber strips. Plus a t drain system with a water sump pump. They want me to pay for the cost of the sump pump which will be approx $1500.00. The contract came with a life time guarantee warranty but now I'm having to pay for a sump pump because they cant stop the water from coming in and now my wall is bowing. Should I contact a lawyer?

BV010607

02:44PM | 02/21/16
Is your waterproofing company Great Lakes Waterproofing?

BV011051

12:48PM | 03/28/16
I had Great Lakes Waterproofing come out and they injected their bentonite clay about every 3 feet along 20 feet at the front of my house where water was leaking into my basement. They give you a wonderful lifetime guarantee, but after coming out the following year and dumping an entire truckload of the clay by the worst damp spot inside - and drilling two holes through my cement porch and refilling that with cement), my basement is as wet as ever. After talking with another contractor I discovered their clay only disburses about 3-4 inches so leaves huge gaps for water still to come in, and after a few times coming out they'll want to put in drain tile and a sump pump. I'm having a trencher come out this week and waterproof correctly - from the outside of the house!

Boneyard1

01:11PM | 03/31/16
Member Since: 11/04/07
20 lifetime posts
BV010442 You might have a few issues going on, it sounds like your wall is failing structurally and the mortar is no longer able to bind the blocks together, probably caused by long term exposure to wet soil conditions (this usually takes several years or even decades). This may have opened up cracks that the bentonite is no longer able to bridge. While the bentonite may not seem to not be working, the moisture could also be due to several other issues including soil moisture saturation which leads to water ponding on the surface. Most exterior waterproofing products do not stop above-grade water, so holes or cracks above the surface will need to be addressed as well for worse-case scenarios. Products like hydraulic cement or even exterior rated caulks will help seal these openings.
In addition; egress windows and wood-framed basement windows are notorious for letting water in if the water gets high enough. Rotted wood around the frames or even openings between the trim and foundation can be an easy entrance for water, it becomes hard to detect where it comes in since it enters the blocks and flows between them before finding it’s way out to your floor. The last few years in the Midwest have seen record-breaking rain storms so providing a pathway away from the foundation is extremely important. Stabilizing the wall is a great idea, it’s actually fairly common with bowing walls to stop any additional movement.
I would work with your contractor to determine the water flow, this can be difficult when it’s not raining so photos of the foundation both inside and outside when it’s leaking can be extremely valuable.


BV011403

09:54PM | 04/25/16
BV011051 Some of your claims seem a little extreme, dumping a truckload of bentonite would be cost prohibited and most likely would not solve the problem, this is not a common practice for remedial waterproofing. As far as the disbursement rate, the idea is for it to follow the water, filling voids and pockets and swelling when in contact with moisture. If your void is 3-4 inches, then yes it will only travel that far, if you have a six cubic foot void at the footing, then it will fill that area. Some words of caution for your excavator, make sure they trench to OSHA specifications for safety reasons, search for “trench cave-ins” for more information, most of these are waterproofers exposing the foundations. They are not using trench boxes and are killed by the walls collapsing.
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