A wet basement is a water management problem, and water management is plumbing. ProStream Plumbing waterproofs basements across Baltimore City, Baltimore County, Anne Arundel County and Howard County using interior drainage and properly engineered sump systems — not coatings that fail the next time it rains hard.
Why Maryland Basements Get Wet
The regional soil profile is dominated by dense clay that absorbs water slowly and holds it against foundation walls. During the heavy summer storms and long winter saturation typical here, that trapped water creates hydrostatic pressure at the footing and pushes moisture through every available path.
Add housing stock that largely predates modern foundation drainage — century-old rowhomes with stone or block foundations, mid-century suburban basements with no interior drain tile — and seepage becomes a matter of when, not if.
Our Approach
- Assessment of grading, downspout discharge and exterior water sources first.
- Interior perimeter drainage installed at the footing to intercept water before it reaches the floor.
- Properly sized sump basin, primary pump and battery backup for storm-and-outage conditions.
- Code-compliant discharge routed well away from the foundation with freeze protection.
- Wall-floor joint and crack treatment where seepage is localized.
- Dehumidification to control residual moisture and odor.

Start With the Cheap Fixes
Before any interior work, we check the obvious: downspouts discharging at the wall, grading that pitches toward the house, window well drainage, and any plumbing leak inside the basement. A meaningful number of wet basements improve dramatically from extending downspouts and correcting slope, and we would rather tell you that than sell a system you do not need.
Backup Power Is Not Optional
The storms that flood basements are the storms that cut power, and a sump pump without a battery backup is offline exactly when the water peaks. Every system we design accounts for that, because a dry basement that depends on the grid staying up is not actually protected.
Call (443) 949-5878 to have your basement water problem properly diagnosed.

