Expected Lifetime for Exterior Waterproofing


Old 02-24-13, 01:06 PM
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Expected Lifetime for Exterior Waterproofing

My home was built in the early 1980s. Only about 4 feet depth of the entire front side and one side of the home has dirt on the other side of the wall. Essentially the home is a walk out basement and the sides have very little actually under ground. I am not sure what product was used to seal the brick and cinder block that goes below ground level however I can see where a black tar looking substance was sprayed below ground level. I don't know anything else about how it was sealed. I am not seeing any signs of problems at this time however I am considering having some grading and landscaping done around the house. I have been told previously that some products will only last X amount of years so not sure if I should have it resealed before I spend all this money on landscaping. I would hate to have to tear it all out in 4 years to reseal the walls.

I guess my question is, based on the fact that it seems to be doing fine right now, would there be any reason to have it dug up and re sprayed before I pay to do all this landscaping? In other words, would a product used in the early 80s be expected to last the lifetime of the structure or should I expect to have to re seal it within the next few years as a part of regular maintenance given the home is 31 years old ?

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Old 02-25-13, 06:55 AM
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Best bet is to assume the waterproofing is already not working and divert all water away from the foundation with grading, gutters and downspout extensions.
Old 02-28-13, 05:29 PM
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I don't think anything was sprayed. I've done a lot of water proofing & we used the tar to seal the membrane. Dig down about 3 feet. See if there is membrane there or not. If it's there, everything should be fine.
Old 03-01-13, 05:12 AM
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I used to paint for one builder that had more than his share of basement leaks He built one house where the buyer specified a certain foundation sealing company to waterproof the foundation. They sprayed what looked like foundation tar on the block, installed some type of membrane and then sprayed on another coat of the black stuff. That was probably 15 yrs ago and that was the only house I've seen it done that way...... but I'm a painter, not a foundation sealing specialist

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