How to Waterproof Below Ground Basements

Mitigating a leaky basement can be done by following some simple steps.

A leaky basement can cause expensive damage to both the home and your possessions. Almost all basements will leak in their lifetime because they are not designed like the hull of a boat. Modern foundation systems have reduced the likelihood of leaking, but If enough water rests against the foundation, it will eventually make it into the home. Reducing the chances of this occurrence can be accomplished by taking some simple steps.

Instructions

1. Control the rain and surface water around your home. Make sure your home's downspouts extend at least 4 to 6 feet away from the house. Check that the lot grading around the house slopes away from the foundation and provides a path for it to move well away from the building. Controlling water around the home is the easiest way to reduce the chance of a wet basement.

2. Inspect the visible portions of the foundation walls for cracks or holes. These can be repaired by a foundation specialist by injecting polyurethane foam or epoxy into them.

3. Apply a foundation waterproofing sealant to the interior of the foundation. If your basement foundation is exposed, you can apply these products in the same fashion as paint.

Tips & Warnings

• No basement will ever be 100 percent waterproof. Even the best systems are only water resistant. Controlling surface water is the most important and least expensive step. If the problem persists you may need to hire a professional to excavate around the foundation down to the footings and repair the drainage tile. All the foundation waterproofing in the world won't help if the water is trapped against the foundation.

References

• This Old House: How to Waterproof a Basement
• Discover Horizon: Basement Leakage