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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Interior Water Management Systems

Many interior drainage systems are patented and recognized by B.O.C.A (Building Officials and Code Administrators) as being effective in controlling basement water. They function by draining underground water from alongside the foundation footers and underneath the basement floor or from the walls across the footing and into a French drain. The French drain channels it into a sump pump system, which will then pump the water from the basement. It is important to make necessary changes and add protection to these systems since many are only builder grade or are installed incorrectly and fail.

Interior Drainage System Process:

  • Water enters the home at a basement wall floor joint.
  • A perimeter trench drain, such as a French drain, collects the water from under the floor before it enters into the basement. A pressure relief system in the wall bleeds out, or releases, that pressure to the lower system (French Drain).
  • The drain directs the water to a sump pump.
  • The sump pump directs the water out of the house.

French Drain

A French drain, or land drain, is a ditch filled with gravel. It redirects surface and ground water away from an entry point and toward a sump pump. French drains are common drainage systems, primarily used to prevent ground and surface water from penetrating or damaging building foundations. Alternatively, the French drain technique may be used to distribute water, such as that which flows from the outlet of a typical septic tank sewage treatment system. French drains are also used behind retaining walls to relieve ground water pressure.

French drain services and repair »

Sump Pump Pit

A sump pump works to remove water that has accumulated in a sump pit. A sump pit, typically located in a home’s basement is a pit designed to collect water. The water may enter via the perimeter drains of a basement water management system, or from heavy rain or because of natural ground water if the basement is below the water table level.

Sump Pump services and installation »


A dry well is an underground structure that disposes of unwanted water, most commonly storm water runoff, by dissipating it into the ground. Simple dry wells consist of a pit filled with gravel, riprap, rubble, or other debris. Such pits resist collapse. These dry wells are usually buried completely, so that they do not take up any land area.

Drywell services and repair »

Submersible Pumps

Submersible pumps are found in many applications:

  • Single stage pumps for drainage
  • Sewage pumping
  • General industrial pumping
  • Slurry pumping
  • Aquarium filters

Multiple stage submersible pumps are typically lowered down a borehole and used for water abstraction or in water wells.

Interior Water Management System

Stone Foundation with Interior Water management System Using Dura Shield

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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).