Communicate with Your Waterproofing Contractor

Waterproofing your basement or foundation isn't an exact process, much less an exact science. There are numerous ways water can enter your home. Properly identifying these entry points and water sources isn't always easy. Finding a good waterproofing contractor is tricky. On the other hand, a waterproofing contractor who doesn't properly identify the problem or problems in your home may fail to remedy the problem.

It's probably better to lean toward the latter situation but only if you find a waterproofing contractor who's upfront about the situation. He or she may suggest trying something that has a chance of working that will save you a lot of money but, he or she should also prepare you for other contingencies if a specific plan fails.

Identifying the Problem
The first step in basement waterproofing is to identify the source of the water. This will almost always determine the necessary treatment and the cost of waterproofing. Here are some of the more common problems:

Cracked Walls—Often, concrete walls can crack over time. This is easier to detect and repair in unfinished basements. These cracks can be sealed from the interior and/or exterior depending on the situation, cost, and extent of the problem.

Water Seepage—Even with seamless basement and foundation walls, excessive water can inundate the walls and building up hydrostatic pressure until water is "pushed" through the walls into your basement. This problem can usually be fixed simply by cutting off the water source caused by inadequate water diversion. Damaged gutters are common source of excess water. Water may also be coming from your yard, which may require the installation of French drain.

Below Grade Foundations—If your yard or a new installation such as a driveway, causes the exterior grade to be raised above the foundation, water may start pouring into your basement. Often, lowering the exterior grade is not an option in this situation. An exterior membrane, essentially a glorified patch, is usually effective for this problem.

Hiring a Waterproofing Contractor
Checking references is never more important than when you hire a waterproofing contractor. Ask for a reference where a problem occurred with the waterproofing process. Talk to that homeowner about the nature of the problem and how the contractor dealt with it. Finding an experienced contractor will help assure you that he or she has "seen it all" and will be able to tackle any problem you may have. Always a good idea, it's especially important to sign a clearly stated written contract. You also shouldn't have to pay for the entire balance of the estimate upfront. That said, keep in mind unforeseen difficulties may arise. Hire the contractor you feel you can trust so the two of you can discuss and work the problem together.