Why Choose BWT?

Our local Baltimore waterproofing professionals have the experience necessary to diagnose, recommend and install permanent solutions to your water problems. In our 15 years of experience, we have worked with:
  • Homeowners
  • Realtors
  • Commercial Property Management Teams

"We had met with several other contractors who gave me proposals for 2 to 3 times more than what you quoted me. You and your guys came in, did the work and were gone. I hardly knew they were there!"
-Gina R., Baltimore, MD

Read more of our testimonials to learn what other customers think of our expert services.

BWT is proud to be Going Green by recycling all of our cement debris, plastics, worn out batteries, non-functioning pumps and other various materials removed from our job sites.

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Exterior Waterproofing

Exterior waterproofing stops water from entering foundation walls, and thus prevents the wicking and molding of building materials. Prior to the 1980’s, much of the original exterior waterproofing was actually damp-proofing using a degradable asphalt-based covering. These asphalt and tar-based compounds are affected by soil pH, and break down after 10 to 20 years, thus making that type of waterproofing ineffective over time.

Today, polymer products will completely waterproof an exterior foundation wall. With a half life in the thousands of years, these polymers make an ideal long-term exterior waterproofing solution.

When you contract with Basement Waterproofing Technologies, you can be assured that your exterior walls will receive waterproofing treatment, not merely damp-proofing. We use the newest technology and products to assure that your system will continue to keep your home dry for many years.

BWT’s multi-step process to exterior waterproofing includes:

    • Excavation of dirt from foundation of home
    • Installation of a drainage system
  • Parging of walls with waterproofing material applied about ½” thick
  • Application of waterproofing compound, such as epoxy, and membrane
  • Backfill of dirt, ensuring proper ground slope away from home

Parging is the process of applying a thin coat of a cementitious or polymeric mortar to the exterior of concrete. The intent is to create a contiguous surface by filling surface air voids and bug holes and to level concrete with extreme rugosity to a level suitable for top coating with a high-performance protective coating.

Exterior Waterproofing with Membrane & Footer Drain


Click here to view the areas that we serve

Basement Waterproofing Services for Baltimore City, Baltimore County, Montgomery County, Prince Georges County, Harford County, Howard County, Anne Arundel, and Cecil County, Maryland, MD including: Catonsville (21228), Cockeysville (21030), Homeland (21212), Lutherville (21093), Monkton (21111), Mount Washington (21209), Owings Mills (21117), Parkton (21120), Phoenix (21131), Pikesville (21208), Randalstown (21133), Reisterstown (21136), Roland Park (21210), Ruxton (21204), Timonium (21204), Towson (21204, 21286), Upperco (21155), Woodstock (21163).