By Mark J. Donovan
Waterproofing basement walls is frequently necessary when finishing a basement. Most basements have high moisture levels, and much of the moisture enters via the basement walls. If not addressed mold and mildew will grow causing potential health dangers to your family.
The first step in reducing moisture levels in the basement is to seal all basement wall cracks with a hydraulic cement sealer.
The next step in reducing basement moisture levels is to apply a water sealer to the inside basement walls. The water sealer should be applied after the hydraulic cement sealer has fully cured.
If there is extensive water seepage via the basement walls it may be necessary to install a perimeter drain around the outside of the basement foundation. This will require digging around the basement foundation down to the footing level, and installing perforated PVC piping. During the installation of the perimeter drain an external water sealer should be applied to the basement walls.
The installation of gutters may also be required if roof rainwater is falling on the ground near the basement walls. The gutters should be installed such that water is directed away from the foundation basement walls.
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