Dundalk, MD Basement Waterproofing & Foundation Repair
- Licensed & Insured
- 5-Star Rated
- Local Business
- Transferable Warranty
Waterproofing & Foundation Services in Dundalk, MD
Dundalk was built to house the people who worked the Sparrows Point steel mill, and much of that 1940s and 1950s housing still stands: brick rowhouses, duplexes and modest single-family homes, most of them with basements. Those foundations have been sitting in low, wet ground along the Patapsco and Bear Creek for more than seventy years. Best Buy Waterproofing provides basement waterproofing and foundation repair in Dundalk for those older homes and for the newer houses mixed in among them.
Our own crew handles waterproofing, foundation, crawl space and spray foam work, plus mold remediation and basement finishing. We have served homeowners since 2017, are licensed in Maryland, Virginia, Washington DC, Pennsylvania, Delaware and West Virginia, and carry insurance. Every job starts with a free inspection. We are available 24/7, and financing is offered.
Our Services in Dundalk
Basement Waterproofing
Interior drainage, sump pumps and crack repair built for narrow rowhouse basements and older block walls that take on water when the low ground around Dundalk stays saturated.
Foundation Repair
Carbon fiber straps and steel I-beam braces for bowing walls, block wall rebuilds, and push or helical piers when a corner of the house has started to sink.
Crawl Space Repair
Sealed liners, encapsulation and commercial-grade dehumidifiers for damp crawl spaces under additions and older homes, plus joist and beam support for floors that have started to sag.
Mold Remediation
Contained, careful mold removal in basements and crawl spaces, paired with a fix for the leak or humidity that let it grow, so the problem does not simply return.
- Mold Inspection
- Containment & HEPA Filtration
- Mold Removal
- Moisture Source Repair
Basement Finishing
Turn an unused lower level into finished living space with moisture-resistant materials. We check for water first and only add waterproofing when the basement actually needs it.
- Moisture Check First
- Moisture-Resistant Wall Panels
- Flooring & Ceilings
- Egress Windows
Spray Foam Insulation
Closed-cell spray foam on basement walls, rim joists and crawl space walls to seal drafts, limit condensation on cool masonry and warm up the floors above.
- Basement Wall Insulation
- Rim Joist Insulation
- Crawl Space Insulation
- Closed-Cell Foam
Basement & Foundation Problems We Solve in Dundalk, MD
Dundalk sits on low Coastal Plain ground where layered sandy and clay soils hold water long after heavy summer storms, and freeze-thaw winters add their own stress. Pair that with brick and block foundations from the 1940s and 1950s, and most Dundalk homes face some mix of seepage, wall movement and lower-level dampness.
Seepage Days After the Rain
On low ground, the soil around a foundation can stay soaked well after a storm passes. That water presses against the walls and finds the cove joint, mortar seams and old cracks, so a basement keeps seeping for days. Interior drainage feeding a sealed sump pump collects that water before it spreads across the floor and pumps it outside. Basement Waterproofing in Dundalk →
Cracked and Bowing Block Walls
Wet clay swells and pushes sideways, and frozen soil adds pressure every winter. Over the years, block foundations answer with stair-step cracks, a long horizontal crack or a wall that leans inward. Carbon fiber straps or steel I-beam wall braces secure a wall with early to moderate movement, and sections that have failed can be rebuilt with new block. Foundation Repair in Dundalk →
Sinking Corners and Uneven Floors
Soft or wet soil can lose its ability to carry a footing, especially at a corner where downspouts dump water. The result is a crack that widens toward the top, a floor that slopes and doors that stop latching. Push piers or helical piers transfer the weight of that section to firmer soil below and help stop further sinking. Foundation Repair in Dundalk →
Musty Crawl Spaces Under Additions
Many Dundalk homes have a crawl space under a rear addition or an enclosed porch, often with bare soil and open vents. Humid summer air condenses on cooler joists, and the space starts to smell. A sealed vapor barrier or full encapsulation with a commercial-grade dehumidifier dries it out and protects the framing and the floor above. Crawl Space Repair in Dundalk →
Cold, Clammy Lower Levels
Older basements were rarely insulated, so heat escapes through bare masonry and open rim joists in winter, and humid air beads up on the same cool walls in summer. Closed-cell spray foam on basement walls and rim joists seals those gaps, cuts condensation and makes the floors above noticeably warmer once water problems are handled. Spray Foam Insulation in Dundalk →
How It Works
Free Inspection
A specialist visits your Dundalk home and finds the source of the problem.
Your Recommendation
We walk you through what we found and the solution we recommend for your home.
Expert Installation
Our own crew completes the work, including any permits your project needs.
Warranty Protection
Your repair is backed by a transferable warranty.
What Affects the Cost of Waterproofing & Foundation Repair?
No two Dundalk homes are the same, so we don’t quote from a price list. After a free inspection you get a firm price for your home.
Source of the Problem
Surface water, groundwater pressure and plumbing leaks each call for a different fix.
Size of the Area
How many walls, how many linear feet, and how much of the space is affected.
Foundation Type
Poured concrete, block, brick and stone foundations are repaired differently.
Structural Condition
Cracks, bowing or settling may need stabilization along with waterproofing.
Access & Finished Space
Finished walls, flooring, tight crawl spaces and landscaping affect the work.
Equipment Needed
Sump pumps, battery backups, dehumidifiers and drainage add-ons.
Dundalk Basement & Foundation FAQs
Can you waterproof a rowhouse basement in Dundalk?
Yes. Rowhouse basements are often narrow, with shared walls on one or both sides, so interior waterproofing is usually the practical choice. A drain along the inside of your walls carries water to a sealed sump pump, all within your own basement, so no work is needed on a neighbor’s side.
Why does my basement keep leaking long after the storm ends?
Much of Dundalk is low ground with slow-draining layered sandy and clay soils. After heavy rain, the soil around your foundation can stay saturated for days, and that water keeps pressing on the walls and floor joint. Relieving that pressure, not patching one spot, is what ends the seepage.
Is a stair-step crack in my block wall serious?
It can be. Stair-step cracks in the mortar often point to soil pressure or settlement, and they are common in older Dundalk foundations. A thin, stable crack may only need sealing, but one that is widening, offset or paired with a bulging wall needs stabilization. Our free inspection measures the wall and tells you which situation you are in.
Are you licensed to work in Maryland?
Yes. Best Buy Waterproofing holds Maryland license number 134853 and is also licensed in Virginia, Washington DC, Pennsylvania, Delaware and West Virginia. We are insured, have served homeowners since 2017 and use our own in-house crew for every job. When a permit is required for your project, we handle it.
How much will my project cost?
We do not work from a price list. The length of wall involved, access, foundation type and the system you need all affect the price. After a free inspection, you get a firm price and a clear explanation of what we recommend. Financing is available.
Do you offer mold remediation and basement finishing in Dundalk?
Yes. Both are available to Dundalk homeowners through our main service pages. If we find mold, we remove it and fix the moisture source behind it. Basement finishing is offered on its own, and we check the space for water first so we only add waterproofing when it is truly needed.
Areas We Serve In and Around Dundalk
We work throughout Dundalk and in nearby communities across southeastern Baltimore County and beyond.
Serving all of Dundalk
- Old Dundalk
- Turner Station
- 21222
Nearby service areas
Schedule a Free Dundalk Inspection
If your Dundalk basement takes on water or a block wall has started to lean, we can help. Book a free inspection, and we will walk you through what we found and what we recommend. Financing is available.
