Waterproofing

​Waterproofing Services in the South Bay

Protect What Matters. Stop Leaks Before They Start.​

Water damage can be costly, unhealthy, and difficult to detect—until it’s too late. At Ewell Construction, we specialize in proven waterproofing solutions that protect your home or building from moisture intrusion, structural damage, and mold growth.
From windows and decks to subgrade foundations, our waterproofing services are designed to seal, secure, and safeguard every part of your property. Select the service below that best fits your situation:

Window Waterproofing

​Seal around your windows before leaks start »
Water intrusion around windows is a top cause of wall damage and mold. We install and repair window flashing and barriers to ensure lasting protection.

​Patio Door Waterproofing

​Keep water out where your home is most vulnerable »
Sliding doors and patio thresholds are common leak points. Our detailed waterproofing solutions stop moisture from reaching your floors and framing.

Deck & Balcony Waterproofing

Prevent leaks and wood rot under your outdoor spaces »
We apply durable waterproof coatings and membranes to decks and balconies, helping prevent costly structural damage over time.

Subgrade Waterproofing

Protect foundations, basements & below-ground walls »
Waterproofing at or below ground level is essential for long-term stability. We use commercial-grade systems to shield subgrade areas from groundwater and intrusion.

Building Paper Replacement

Upgrade aging or damaged barriers behind your siding »
Old building paper can fail over time. We remove and replace it with modern moisture barriers to improve waterproofing and energy efficiency.

Tufflex Waterproofing System

​Premium waterproofing for high-traffic surfaces »
This flexible, durable coating system is ideal for decks, balconies, walkways, and rooftop patios. Slip-resistant, UV-resistant, and long-lasting.

Why you should choose Ewell Construction.

  • A contractor will inspect the proposed job site to determine the source of the water intrusion.

  • Several technicians will be sent to the job site with the proper equipment and radios to ensure effective communication around the site.

  • Different areas, beginning at the lowest point, will be isolated to pinpoint the entry location.

  • Each water test is tailored to the structure depending on where the leak is and the surround features of the building.​

  • After a leak is found, the contractor will discuss repair options with the owner and waterproofing solutions that may be available.
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