Comprehensive Home Waterproofing

Water intrusion doesn’t just damage a basement — it weakens your foundation, reduces your home’s value, and can lead to long-term structural and air quality issues. At Sump Daddy, we provide comprehensive interior and exterior waterproofing solutions designed for older homes throughout Washington, DC and surrounding Maryland communities.

Whether your home has a finished basement, a dirt crawlspace, or bare foundation walls, we custom-design a waterproofing system that protects your property for decades to come.

Our Waterproofing Methods

We use a combination of time-tested building techniques and modern waterproofing materials to permanently manage groundwater and surface water threats.

Interior Waterproofing Options

  • Interior French Drains – We install perforated pipe along the basement perimeter below slab level, channeling groundwater into a sump basin before it enters the living space.
  • Sump Pump Systems – Every interior system includes a reliable sump pump, basin, gravel bed, vapor barrier, and a discharge line to move water out and away.
  • Moisture Barriers – We apply sealed vapor barriers and waterproof coatings to interior walls to stop seepage and reduce humidity.
  • Crack Injection – Where needed, we seal foundation cracks using polyurethane or epoxy injection to stop active leaks.

Exterior Waterproofing Options

  • Excavation & Foundation Wall Sealing – For major water intrusion, we excavate the foundation to expose the outer wall, clean it, and apply a combination of waterproof membrane, elastomeric sealant, and dimple board.
  • Footer Drains & Wall Drains – Installed along the base of the foundation to collect groundwater and move it away from the structure.
  • Proper Backfill & Grading – After waterproofing, we backfill with clean gravel, compact soil, and restore grading to prevent surface runoff from pooling near the home.

We tailor each system to the site, soil, foundation type, and water pressure levels. Our waterproofing work is not one-size-fits-all — it’s engineered for your home.

Invest in Your Home’s Future

Professional waterproofing is more than just stopping a leak — it’s a long-term investment in the health, safety, and value of your property. Our clients often experience:

  • A significant reduction in basement humidity and mold risk
  • Improved air quality for the whole home
  • Increased insulation performance and energy efficiency
  • A dry, usable, and livable lower level
  • Increased buyer confidence and resale value

Serving DC & Nearby Neighborhoods

We’ve waterproofed basements and foundations in Capitol Hill, Petworth, Silver Spring, Brookland, College Park, Cheverly, and dozens of other nearby neighborhoods. Our experience with historic and older homes gives us the insight needed to work carefully and effectively — without damaging delicate foundations.

Free Inspections. Written Proposals. Guaranteed Work.

All waterproofing inspections are free, and our proposals include clear pricing and detailed scopes of work. We stand behind our work with warranties and industry-standard installation practices. We don’t cut corners — we keep water out.