Professional Basement Waterproofing and Crawl Space Repair in Wilmington, DE

Basement Waterproofing Services

Wilmington, DE is known for its blend of historic character, walkable neighborhoods, and dense tree-lined residential streets that give the city its unique charm. From the classic homes in The Highlands and Forty Acres to the rowhouses near Trolley Square and other established neighborhoods throughout the city, many Wilmington homes face ongoing basement moisture and foundation concerns due to age, weather, and changing ground conditions.

At Jamison Basement Waterproofing, we provide reliable waterproofing solutions designed specifically for the needs of Wilmington homeowners. Older foundations, compact urban lots, mature landscaping, and seasonal weather changes can all contribute to water intrusion, excess humidity, and basement leaks. Our team works to identify the source of the problem and install long-term solutions that help keep your basement dry, healthy, and protected.

The Wilmington experiences humid summers, wet winters, and frequent rainstorms throughout the year. Combined with freeze-thaw cycles and aging drainage systems, these conditions can place added pressure on basement walls and foundations. Over time, moisture issues can lead to musty odors, mold growth, cracks, and structural damage if left untreated.

Our experienced waterproofing professionals offer a full range of basement and foundation solutions, including interior drainage systems, sump pump installations, exterior waterproofing, crack repair, and moisture control systems. Every project is tailored to the unique layout and condition of your home to provide dependable, long-lasting protection.

For more than 35 years, Jamison Basement Waterproofing has been helping homeowners throughout the region maintain safer, drier homes. As a family-owned and operated company, we take pride in delivering quality workmanship, honest service, and personalized solutions backed by decades of experience and industry recognition, including honors from organizations such as Angie's List.

Jamison Basement Waterproofing's Services in Wilmington, PA

Our services are designed to keep your home healthy and safe. Here's a list of some of our popular services in Wilmington, PA.

Contact Jamison Basement Waterproofing Today

For more information about any of our services, please call 484-276-2272 or send us a message via our online contact form found in our Contact Us page. We would be happy to provide with a quote and answer all your questions about our services.

Completed Jobs from Wilmington and Surrounding Areas

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April 06, 2026 | Wilmington , DE

September 08, 2017 | Wilmington, DE

As one of the area’s most competent and respected basement waterproofing company's Jamison Basement Waterproofing sent out project Manager Steve Custus to evaluate the Basement. Steve found out that the homeowners main concerns was the basement leaking belico area . So Steve recommended the Grate Sump pumps / Grate Trench and mold remediation..

September 08, 2017 | Wilmington, DE

As one of the area’s most competent and respected basement waterproofing company's Jamison Basement Waterproofing sent out project Manager Steve Custus to evaluate the Basement. Steve found out that the homeowners main concerns was the basement leaking belico area . So Steve recommended the Grate Sump pumps / Grate Trench and mold remediation..

Real Client Needs in Wilmington

Brad K.

I’m a previous customer and noticed pitting on an exterior foundation wall, so I requested a free estimate; I scheduled an on-site visit and the company confirmed they handle exterior foundation repairs.
Rob L.

I called to pay the 25% deposit for my proposal and confirm next steps; I ran into a card issue but will complete the payment on the website so the company can proceed and contact me to schedule.
Rob L.

I need someone to inspect a crack where my sewer line exits and water is coming in, and I also need a new sump pump; I scheduled a free on-site estimate.
Elisa V.

I live in Wilmington and need crawl space encapsulation/waterproofing. I scheduled an appointment to have someone come out.

Before and After Job Photos Wilmington

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July 28, 2020 | Gladwyne , PA

Water coming in exterior doorway !

October 14, 2016 | Conshohocken, PA

September 23, 2020 | Philadelphia , PA

Old Chestnut hill basement / stucco the walls / new drainage system with sump pump and entire new basement floor ..

October 09, 2020 | Wyndmoor , PA

Waterproofing drainage system / moisture vapor barrier / I GrateSump and battery back up plus coating the floor ..

Photo Galleries from Wilmington

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West Chester , PA

Newtown Square , PA

iBasement Systems & Crawl Space Systems Certificates in the Philadelphia Area

The iBasement Systems and Crawl Space Systems Certificates were created using specific sets of criteria to provide a healthy indoor living environment. Air pollutants and excessive moisture levels in the basement or crawl space can negatively impact the odors in the home as well as cause health problems with those who live there year-round - including yourself!

We offer 6 levels of iBasement Certificate, and 5 levels Crawl Space Systems Certificate, each designed to solve specific problems and protect your home, family, and property value on the long run.

Basement Space System
Crawl Space System
Financing available!

Financing Available to Qualified Buyers!

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Start your journey effortlessly with a soft credit pull via PreQualify, and transition seamlessly into our Online Application!

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