Waterproofing service
Polyurethane Waterproofing in Maryland, Virginia & Delaware
Relevel uses single-component polyurethane to help stop water moving through poured concrete, CMU walls, and stacked stone foundations. The material follows cracks and voids, reacts with water, and helps form an overlapping exterior barrier where the leak begins. Service is available for homes and light commercial properties throughout Maryland, Virginia, and Delaware.


Signs and causes
When Water Is Entering Through the Foundation Wall
Basements and business interiors often show water on the inside even though the entry path begins outside the wall. Cracks, voids, porous masonry, and moving water can carry moisture and dirt through poured concrete, CMU, or stacked stone. Relevel evaluates where the water is traveling before recommending single-component polyurethane waterproofing.
Why this service works
Stop the Water Path Instead of Covering the Interior Stain
Single-component polyurethane moves through cracks and voids, reacts with water, and helps seal the exterior path where intrusion begins.

Follow Cracks and Voids
The material travels through hidden pathways that allow water and dirt to move through the wall.

React With Water
Single-component polyurethane activates when it contacts moisture, helping seal areas reached by water now or later.

Build an Exterior Barrier
Overlapping injections help create a water-stopping barrier outside the structure instead of relying on an interior patch.
How it works
How Relevel Waterproofs Foundation Walls
The team traces the likely water path, creates targeted access, and injects polyurethane behind or through the affected wall.

Locate the Path
We review staining, active leaks, cracks, wall type, exterior conditions, and likely water movement.
Create Access
Targeted injection points are placed to reach the cracks and voids behind the wall.
Inject & React
Single-component polyurethane moves through the pathways and reacts when it contacts water.
Verify & Seal
The treated area is reviewed, access points are sealed, and the work area is cleaned.
Service questions
Polyurethane Waterproofing FAQs
These answers explain compatible wall types, project cost, and how water-reactive polyurethane helps stop foundation leaks.
How much does polyurethane waterproofing cost?
Pricing depends on the wall type, affected area, access, number of injection points, cracks and voids, and the complexity of the water path. Relevel provides project-specific pricing after evaluation.
What types of walls can Relevel waterproof?
The service is designed for poured concrete, CMU or concrete block walls, and stacked stone foundations where water is penetrating through cracks, joints, voids, or the wall assembly.
How does the material protect areas that are not wet yet?
Single-component polyurethane remains positioned in the treated pathways and reacts when water reaches it. This helps protect connected cracks or voids that may not have been wet during the original injection.