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Author Topic: leaky basement.  (Read 3195 times)
mike
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« on: March 06, 2007, 08:51:29 AM »

We have an older home in Etobicoke. With the "freeze thaw" we noticed the basement floor was wet (10 towels). there are no apparent cracks in the block foundation. Our son hired a contractor to evaluate the situation. He was told that there was a falilure on the outside and that there would have to be excavating and resurfacing with tar and membrane to the ouside of the foundation.  New weepers would have to be put in  and conncected to the existing functional drains---- big bucks. I might add that trying do work from the inside would be very difficult.
Are there any better solutions? We're really in a frazzle.
mike :? 
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Rod Johnson
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« Reply #1 on: March 06, 2007, 10:38:48 AM »

Well first off, don't let anyone use tar. It will not bridge any cracks and only lasts a few short years on flat surfaces. When ever our crew digs up a residential foundation, they rarely see any tar left on a wall. We recommend the Blueseal Waterproofing or BlueSkin WP200, but there are many other types of "waterproofing" membrane that can be utilized. The repair shouldn't be just an airgap membrane like Delta-MS or System Platon (classified as Dampproofing only). Those can be added after the waterproofing but that would be overkill.

I f the bare wall has been thoughly examined and there is no breakage in it, then what kind of flaw is the "contractor " talking about? I have hear of far too many stories of contractors who make things up because they just can't bring themselves to say they don't know why it is leaking.

If the is no flaw, then the problem is likely a drainage system failure. You will require either an exterior drainage system repair along that wall or you can put in an Interior Drainage System. Both use weeping tile and need to drain into something. As a possible alternative, you can install a sump system at the location and make sure the plastic liner is full of holes (25 - 50) to let water in.

Hope that helps.

Rod
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