Flash flooding and sewer backup
Intense storms overwhelm the combined sewer in older parts of the city, pushing water up through basement drains.
Sump Pump Installation & RepairNortheast & Mid-Atlantic · DC
Basement waterproofing in Washington, DC
Hot, humid summers, mild winters and intense summer thunderstorms. The city sits on a mix of piedmont soils and coastal-plain clays, with old stream valleys buried under many neighborhoods.
Free referral · Washington, DC
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Call (833) 460-4463By calling, you agree to be connected with an independent waterproofing contractor, who may call or text you back about your request at the number you call from. Calls may be recorded for quality and routing. Consent is not a condition of any purchase; you can opt out at any time, and message and data rates may apply. Privacy policy.
What kinds of foundations do homes in Washington, DC have?
Most housing is historic brick rowhouses with English basements, many converted to rental units; detached homes in upper Northwest have block or poured basements.
What basement and foundation problems are most common in Washington, DC?
English basement leaks
Below-grade front entries and areaways collect water that leaks under doors and through brick.
Exterior Foundation WaterproofingDamp brick walls
Century-old brick wicks moisture, causing efflorescence and musty air.
Basement Mold PreventionWhich parts of Washington, DC are covered?
- Capitol Hill
- Petworth
- Columbia Heights
- Georgetown
- Brookland
- Anacostia
What do Washington, DC homeowners ask most?
Why did my DC basement flood through the floor drain?
Many older neighborhoods are served by combined sewers. In heavy storms the system can back up into basements. DC Water has offered backwater valve rebate programs; a licensed plumber can install one.
Do I need a permit to waterproof an English basement in DC?
Excavation, structural work and drainage tie-ins generally need a permit from the Department of Buildings, and historic districts may need extra review for exterior changes.
Where can I verify this information about Washington, DC?
- 1U.S. Census Bureau: QuickFactsHousing and population facts for Washington, DC, including the age of local housing stock.
- 2USDA Natural Resources Conservation Service: Web Soil SurveyLook up soil drainage class and shrink-swell potential for any lot in Washington, DC.
- 3FEMA: Flood Map Service CenterCheck whether a property in Washington, DC is in a mapped flood zone before finishing a basement.
- 4U.S. Environmental Protection Agency: MoldGuidance on moisture control and keeping indoor humidity low to prevent mold.
- 5Federal Trade Commission: Hiring a ContractorWhat to check before hiring: licensing, insurance, written estimates and payment terms.
Wet basement or cracked foundation in Washington, DC?
By calling, you agree to be connected with an independent waterproofing contractor, who may call or text you back about your request at the number you call from. Calls may be recorded for quality and routing. Consent is not a condition of any purchase; you can opt out at any time, and message and data rates may apply. Privacy policy.