Foundation Waterproofing

Foundation waterproofing involves applying protective barriers and drainage systems to prevent water from seeping into your home's base. Whether you're dealing with a damp basement, visible cracks, or planning ahead to protect your investment, the right approach depends on your soil type, climate, and existing issues. Angi helps you find local pros and the guidance you need to keep your foundation dry and secure.

Related to Foundation Waterproofing

Foundation Waterproofing Articles and Advice
Anna Baluch  •  Apr 10, 2026
Should You Water Your Foundation?
You may need to water your foundation during dry, hot conditions. Learn more about when and how to water your foundation.
Deirdre Sullivan  •  Apr 6, 2026
How to Waterproof Your Foundation: 9 Ways to Keep Water Out
Wondering how to waterproof foundation walls? These tips cover everything from basic waterproofing to leveling your yard to keep water out.
Rachel Hoffman  •  Apr 5, 2026
How to Seal a Foundation: 7 Tips to Try
Sealing a foundation can help keep moisture from damaging your home. Learn what you need to know with these foundation sealing tips.
Deane Biermeier  •  Mar 19, 2026
5 Questions to Ask About Foundation, Basement, or Crawlspace Encapsulation
If your home's crawlspace has water issues, here are the crawlspace encapsulation questions you should be asking a contractor about the project.
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Common Foundation Waterproofing Questions

No, musty odors in your basement likely won’t go away on their own, and they’re likely to get worse if the problem isn’t addressed. To fix the issue, you need to remove materials that have harbored mold or mildew and fix the underlying moisture issue, which is usually either an interior plumbing leak or a foundation leak from water in the soil outside. Once you address these problems, the musty odor should fade with time.

Preventing future basement flooding often involves installing sump pumps, improving drainage, sealing foundation cracks, and maintaining gutters. Costs vary, but preventive measures can range from a few hundred to several thousand dollars, depending on the solutions chosen. Investing in prevention can save you money on future flooded basement cleanup costs and repairs.

Some disadvantages of crawl spaces are mostly regarding the air itself—moisture build-up and poor ventilation, which can cause problems both in the house and underneath it, even damaging the foundation itself. Crawl spaces are difficult to access and often invite unwanted pests during the hot summer months and the cold winter ones. These hard-to-seal spaces are also susceptible to water damage during periods of heavy rain or melting snow.

The proper way to install a window well is to measure the window, dig a hole deeper and wider than the window, place a drainage tube and cap, anchor the well to the foundation, caulk the seam, and backfill the hole. The job requires tools such as a hammer drill and auger and some heavy digging. Proper placement and window well installation are critical to preventing water from leaking into the window.

Methods include interior sealants, exterior excavation and waterproofing membranes, sump pump installation, and vapor barriers for encapsulation. Techniques vary based on the structure and severity of moisture issues.