Skip to main content

Affordable Basement Waterproofing

Basement Waterproofing Services in Maryland, Washington, D.C. & Delaware

Home

Basement Waterproofing Services in Maryland, Washington, D.C. & Delaware

Professional Interior Basement Waterproofing Systems

Basement Waterproofing in Maryland, Washington DC & Delaware

Looking for Basement Waterproofing Near You?

Affordable Basement Waterproofing is your local team for basement leaks, wet walls, and water entering where the floor meets the wall. BBB A+ rated, with free inspections to identify the source and explain your repair options.

We provide basement waterproofing throughout Maryland, Washington DC and Delaware.

Schedule Your Free Inspection →
Since 1998
Licensed & Insured
MD • DC • DE
Completed interior basement waterproofing in Potomac, Maryland, with white Dura-Skrim wall liner and perimeter drainage
Completed Waterproofing Project – Potomac, MD
Interior Basement Waterproofing

A Smarter Way to Keep Your Basement Dry.

Our interior basement waterproofing system is designed to collect and redirect groundwater before it reaches your finished basement. Through a carefully planned perimeter drainage system, water is directed toward a sump pump for controlled discharge.

Interior basement waterproofing illustration showing perimeter drainage and sump pump
INTERIOR WATERPROOFING SYSTEM Typical system configuration
01 / WATER INTRUSION

Where Does Basement Water Come From?

Groundwater can enter through several vulnerable areas of your foundation. Recognizing these locations helps determine how the drainage system should be designed and installed.

01 Foundation wall cracks
02 Block wall cores
03 Wall-floor joint
04 Beneath basement floor
05 Window wells
06 Basement stairways
07 Plumbing and wall penetrations
02 / HOW THE SYSTEM WORKS

Inside the Interior Drainage System

Every component has a specific role in collecting, channeling and directing water away from your basement foundation.

Basement drainage cutaway showing perforated pipe, washed gravel and sump pump basin
Perimeter drainage assembly
Perforated PVC piping and washed drainage gravel help collect groundwater and guide it toward the sump pump basin. Conceptual illustration; installation varies by property.

System Components

Our typical interior waterproofing installation may include:

  1. Interior trench excavation
  2. 4-inch perforated PVC drainage pipe
  3. Washed drainage stone
  4. Filter fabric
  5. Block wall weep holes, where applicable
  6. Wall drainage membrane
  7. White Dura-Skrim wall vapor barrier
  8. Sump pump basin
  9. Zoeller sump pump
  10. Check valve
  11. Exterior discharge line
Designed Around Your Foundation

Not every basement requires the exact same configuration. Our waterproofing approach considers foundation type, water-entry locations and site conditions to determine the appropriate drainage components.

Interior Basement Waterproofing

How Our Interior Basement Waterproofing System Works

Our interior basement waterproofing system is designed to collect and redirect groundwater before it reaches your finished basement. By combining perimeter drainage, drainage stone and a sump pump, we help manage water beneath and around your foundation.

Four-wall interior basement waterproofing system with Dura-Skrim wall liner, 4-inch perforated PVC drainage pipe, Zoeller sump pump and solid PVC discharge line.
Interior basement drainage system overview Typical four-wall system configuration

Where Can Water Enter Your Basement?

Water can enter through different parts of your foundation. Identifying these common entry points helps determine the appropriate waterproofing approach for your property.

  1. Foundation wall cracks
  2. Block wall cores
  3. The wall-floor joint
  4. Beneath the basement floor
  5. Window wells
  6. Basement stairways
  7. Plumbing and wall penetrations

Interior Drainage System

Each component plays a role in collecting, channeling and directing groundwater away from your basement foundation.

Technical cutaway illustration showing basement drainage gravel, perforated PVC pipe and sump pump basin
Perimeter Drainage Assembly A combination of 4-inch perforated PVC, washed drainage gravel and a sump basin helps collect and redirect groundwater. Conceptual illustration. Actual installation details may vary by property.

Our Typical System Includes

Components selected according to foundation type and drainage requirements.

  1. Interior trench excavation
  2. 4-inch perforated PVC drainage pipe
  3. Washed drainage stone
  4. Filter fabric
  5. Block wall weep holes, where applicable
  6. Wall drainage membrane
  7. White Dura-Skrim wall vapor barrier
  8. Sump pump basin
  9. Zoeller sump pump
  10. Check valve
  11. Exterior discharge line
Designed Around Your Foundation

Not every basement requires the same configuration. Our waterproofing approach considers foundation type, water-entry locations and site conditions to determine the appropriate drainage components.

Quality Workmanship

Finished Basement Waterproofing Systems

Clean, Professional Finished Installation

We believe the finished appearance matters.

Our crews work to leave the basement clean and organized after the drainage system has been installed and the floor has been cemented back.

Potomac finished basement waterproofing installation
Completed interior basement waterproofing system with white Dura-Skrim wall protection and finished perimeter drainage.
White Dura-Skrim wall liner covering the basement walls and knee wall above perimeter drainage

White Dura-Skrim liner covering the walls and knee wall above perimeter drainage.
Photo digitally cleaned for website display.

White Dura-Skrim Wall Protection

White Dura-Skrim Wall Protection

White Dura-Skrim helps direct wall moisture into the drainage system while also giving unfinished basement walls a cleaner, brighter appearance.

It can be installed in conjunction with the interior waterproofing system and perimeter wall drainage.

Basement Stairway Drainage

Basement Stairway Drainage

Water entering through exterior basement stairs can overwhelm a basement if it is not properly captured.

Stairway Speedy Drain System

Our stairway drainage system can be connected directly to the interior perimeter drainage system so water is collected and carried to the sump pump.

View down exterior basement stairs toward a white channel drain across the landing near the basement door.
Completed stairway drain at the basement entrance.
Window Well Drain Installation

Window Well Drain Connected to Interior Waterproofing

A look at window well drain installation in Prince George’s County, Maryland, showcasing the process from foundation wall preparation and drain pipe connection to exterior completion and concrete floor restoration.

💧

How the Window Well Drain System Works

A drain line is routed through the foundation wall and connected to the interior basement waterproofing system. This allows water collected in the window well to flow toward the sump pump, helping manage water intrusion and protect the basement from unwanted moisture.

Window well drain installation in Prince George’s County Maryland showing foundation wall opening, drainage pipe connection, exterior window well and concrete floor restoration

Window well drain installation process, including foundation wall preparation, drain pipe connection, exterior window well completion and interior concrete floor restoration.

01. Wall Preparation

Preparing the foundation wall to create a suitable drainage connection.

02. Drain Connection

Connecting the window well drain to the interior basement drainage system.

03. Floor Restoration

Completing the installation with exterior finishing and interior concrete restoration.

Before and after foundation crack waterproofing showing repaired foundation wall
Foundation Crack Waterproofing

Foundation Crack Waterproofing

Foundation cracks are a common source of basement water intrusion. Even small cracks can allow moisture to enter and contribute to damp walls, water seepage and ongoing basement problems.

Depending on the crack and surrounding conditions, repairs may include:

  • Foundation crack sealing
  • Interior wall drainage
  • Dura-Skrim wall protection
  • Interior drainage system connection
  • Structural reinforcement when required
Exterior Waterproofing Project

Exterior Foundation Crack Repair

When exterior access is appropriate, the affected foundation area can be excavated to address the crack from outside. This project showcases the repair process, including hand excavation, foundation treatment and sod replacement to restore the surrounding landscape.

Exterior foundation crack repair showing excavation, foundation treatment and sod replacement
✓

Exterior foundation crack repair – from hand excavation and foundation treatment to completed backfilling and sod replacement.

Sump Pump Installation

Professional Sump Pump Systems

The sump pump is the heart of most interior basement waterproofing systems.

We install professional sump pump systems designed to remove groundwater collected by the drainage system and discharge it away from the foundation.

Available options may include:

Zoeller Sump Pumps
New Sump Basins
Check Valves
Underground Discharge Extensions
Battery Backup Systems
Secondary Sump Pumps

The primary pump removes collected groundwater. An optional battery-backup pump provides added protection during power outages or if the primary pump cannot keep up.

Zoeller sump pump inside an open basin beside a basement perimeter drainage system
Inside the sump basin
The pump and drainage connections collect and remove groundwater.
Illustration of a covered Zoeller sump basin with PVC discharge pipe, battery case and wall-mounted backup controller
Optional battery backup
Added protection during power outages.
System illustration; installation details vary.
Basement Drainage Installation

Why Proper Drainage Installation Matters

Not all basement waterproofing systems are installed the same way.

The size and depth of the trench, type of drainage pipe, stone, filter fabric, wall drainage and sump pump setup all affect how well the system performs over time.

Our waterproofing systems are designed around the conditions of the individual basement rather than using one solution for every home.
Serving Washington, DC

Basement Waterproofing in Washington, DC

Affordable Basement Waterproofing provides interior drainage systems, sump pumps, foundation crack repair and related waterproofing services throughout Washington DC.

View Washington DC Basement Waterproofing Services →
Serving Delaware

Basement Waterproofing in Delaware

We also provide basement waterproofing and drainage services throughout Delaware.

View Delaware Basement Waterproofing Services →
Basement Drainage Installation

Lifetime Waterproofing Warranty Available

Qualifying interior basement waterproofing systems include a transferable lifetime waterproofing warranty.

Ask us about the warranty coverage available for your specific project.
Basement Waterproofing & Moisture Protection

Get a Basement Waterproofing Inspection

If your basement is leaking, the first step is determining where the water is coming from.We will inspect the basement, discuss the source of the problem and explain the waterproofing options available for your home.

Maryland • Washington, DC • Delaware
Schedule Your Basement Waterproofing Inspection