WHAT TO DO IF WATER SEEPS INTO YOUR BASEMENT…BEFORE YOU CALL THE WATERPROOFER…
If water is seeping into your basement, go outside and see if it is near your downspout. Try this test:
Temporarily disconnect your downspout from the clay crock and insert an elbow with at least 6’ of downspout directed away from your foundation and your neighbor’s property. Completely cover the clay crock with thick plastic and anything that will hold it down. When the next rain occurs, check to see if your basement is wet. If it remains dry, this test proved that the problem is in your storm drain. The easiest thing is to have it snaked out by a plumber, who may also tell you that the clay pipes have collapsed which may be very expensive. You can go that route and have them replaced, or leave the downspout the way it is and keep the basement dry.
Another test to try is tape a large piece of 6-mil plastic under the siding of your house and pull it down towards the foundation and ground, then extend the plastic at least three feet away from your foundation and secure it with bricks or stones. This is a test to see if surface water is seeping into your basement rather than the broken drain tile from the example above. If this stops the seepage, the solution is to dig at least two feet down at your foundation where you see the leak from the inside and lay the same type of plastic attached to the foundation and extend outward at least two feet. Backfill with the dirt you removed, and that should help control the surface water drainage into your basement.