WallShield™ · DC, Maryland & Virginia

Exterior Waterproofing

WallShield™ protects the outside of your foundation with a cement-based coat, sheet membrane and protection board, supported by a drainage plan for your home.

Book a Free Inspection Call 1-833-888-2533

We identify the problem, explain the repair, and give you a written price before we leave.

Drain pipe and clean gravel beside the protected exterior foundation wall — Footing-level drain tile and gravel beneath the protected wall, before backfill.

How we install your exterior waterproofing

Six stages, carried out by our own crew.

Swipe to follow all 6 stages → · Tap a photo to view it full size.

Crew beside an excavated exterior foundation; shovel use digitally illustrated — Step 1 of 6Expose and assessWe excavate by hand to expose and inspect the wall–footing joint. Soil is stockpiled on site for reuse as backfill. Tool use digitally illustrated.

Crew mechanically preparing the exposed foundation wall before crack repairs and waterproofing layers — Step 2 of 6Prepare the foundation surfaceGrinders and steel wire brushes remove dirt, loose mortar, old coatings and debris. High spots are ground down; stone-wall joints are opened for repointing.

Repaired foundation wall and formed cove at the wall-footing junction before waterproofing layers — Step 3 of 6Repair cracks & form the coveCracks and joints are cleaned and repaired with polymer-modified mortar. A cove creates a continuous wall-to-footing transition. Damaged blocks and open stone-wall joints are repaired as needed.

Cement-based first layer applied over the exterior foundation wall before the sheet membrane — Step 4 of 6Apply Layer 1: Cementitious WaterproofingA polymer-modified cementitious coat runs from footing to grade, creating a smooth base for the membrane. The coat is kept moist while it cures.

Black sheet waterproofing membrane installed on the exterior foundation wall and footing transition — Step 5 of 6Apply Layer 2: Sheet MembraneSelf-adhered rubberized sheet membrane is bonded over the primed first layer from the cove to grade. Sheets and sealed laps are rolled, then covered with a protection board.

Shallow grading drain beside the house with yellow liner, fabric-wrapped perforated pipe, washed stone and edging — Step 6 of 6Install the grading drainGradingShield™ manages surface water beside the house with grading and a shallow drain. A liner, fabric-wrapped perforated pipe and washed stone lead to the planned outlet. Edging holds the slope in place.

After installation, we backfill in lifts, complete the agreed grading and surface restoration, and review the drainage route with you. These photos show the work before final landscaping.

What affects exterior waterproofing cost?

Wall area, excavation depth and soil conditions.
Access, utilities, planting beds and hardscape.
Existing coatings, wall condition and required repairs.
Drainage outlet, backfill and surface restoration.

Explore financing through Wisetack →

Questions about your project

Is exterior waterproofing the right repair for my basement?

It may suit water entering through an accessible foundation wall. An isolated leaking concrete crack may need crack repair; water beneath the slab may need interior drainage and a sump pump. Surface runoff may call for yard drainage. The inspection determines which approach fits.

Will waterproofing fix a structural problem?

A membrane does not replace a structural repair. Open joints, damaged masonry or displacement need assessment and an agreed repair or further evaluation before the wall is covered.

What will excavation affect, and how long will it take?

Planting beds, paths and other features may need to be moved or restored. We agree access, protection and restoration in writing. The schedule depends on depth, wall repairs, weather and the scope of the work.

What warranty comes with WallShield™?

WallShield™ comes with a 25-year written warranty. The supplied document explains the covered work, transfer provisions and exclusions. Read our warranty overview →

Exterior Waterproofing

How we install your exterior waterproofing

What affects exterior waterproofing cost?

Questions about your project

Let’s talk about your home.

Four local branches

Rockville, MDMAIN

Kensington, MD

Ashburn, VA

Manassas, VA