Proseal Waterproofing & Contracting Inc.
Interior and Exterior Waterproofing
The best time for waterproofing your basement is right after the groundwork is initially constructed.
One of the most common problems for homeowners are leaky basements. If waterproofing was not implemented or done correctly, leaks can lead to a series of severe consequences over time. Learning about your basement waterproofing options will prevent this potential costly crisis.
The best time for waterproofing your basement is right after the groundwork is initially constructed. This will effectively assure that you are protected for an extended time. It will also be easier to access and reach into small gaps before they become inaccessible or close up as a result of settling, and become difficult to spot and deal with.
If you own an older house, it is recommended to contact the expert foundation waterproofing contractors at Pro Seal for a thorough and careful inspection of your basement before choosing which waterproofing solution might be best for you.
Exterior Waterproofing
Exterior waterproofing protects your home by sealing the foundation from the outside, preventing water from ever entering your basement. This process involves excavating around the home, repairing cracks with hydraulic cement, and applying a two-layer commercial-grade rubber membrane reinforced with mesh for durability. A soil-side drainage sheet and weeping tile system are then installed to redirect water away from the foundation.
Additional protective steps include adding ¾-inch gravel for drainage, installing vertical pipes for window wells, and backfilling the area with compacted soil. Window wells and other entry points are sealed to prevent flooding and further leaks. The entire process strengthens your foundation and ensures long-term protection from moisture and structural damage.
Unlike basic damp-proofing, which only meets minimum building codes, true waterproofing bridges cracks and withstands water pressure, offering a reliable, lasting solution. It’s one of the most effective ways to fix leaky basements and maintain your home's structural integrity and value.
benefits of exterior waterproofing
Exterior waterproofing seals your home’s foundation from the outside, stopping water before it enters. This eliminates moisture, prevents musty odors, reduces mold risk, and keeps your basement dry creating a healthier, safer, and more comfortable living environment.
By reinforcing your foundation and preventing water damage, exterior waterproofing strengthens your home’s structure. It minimizes future repair costs, protects valuable belongings, and adds lasting peace of mind knowing your property is protected against leaks and shifting foundations.
interior Waterproofing
Interior waterproofing is a cost-effective way to fix basement leaks and moisture from the inside of your home—no exterior digging required. This method is ideal when outdoor access is limited or when you're looking for a clean solution for an unfinished basement. It’s especially effective at relieving hydrostatic pressure, where groundwater pushes up through the floor or where the wall meets the slab.
Our process includes removing drywall to expose the foundation, digging a narrow trench along the basement perimeter, and installing a perforated weeping tile with filter sock that drains water to a sump pump or floor drain. We apply a dimpled drainage membrane to the wall, cover the system with gravel, and pour new concrete to restore the floor—leaving your basement dry, mold-resistant, and ready for finishing.
Interior waterproofing not only protects your home’s structure but also helps improve indoor air quality by preventing mold and mildew growth.
benefits of interior waterproofing
Cost-effective waterproofing solution that avoids exterior excavation, making it ideal for finished homes or restricted outdoor access areas.
Prevents mold growth and improves air quality by keeping your basement dry, safe, and free from excess moisture.
