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Holdfast Basement Waterproofing

Service area · Lehigh County, PA

Basement waterproofing in Allentown, PA

Allentown sits in the Lehigh Valley on limestone bedrock that dissolves over time, so sinkholes are a real local risk alongside ordinary basement seepage. Rowhouses, twins and early 20th-century homes on stone and brick make up much of the city.

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.

Neighborhoods
West End, East Side, South Side, Old Fairgrounds

Allentown: call now

(833) 460-4463

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.

What kind of homes and basements does Allentown have?

Center City has dense brick rowhouses; the West End has larger 1920s homes on stone and brick; the East Side and South Side have twins and mid-century homes on block; Mountainville has newer poured basements.

What causes basement and foundation problems in Allentown?

Limestone sinkholes

Allentown has had sinkholes open in streets and yards. Leaking pipes and concentrated downspout water speed them up; settlement cracks on carbonate rock need an engineer's assessment.

Downspouts and karst

Water should be spread out, not dumped in one spot, to avoid dissolving rock under the foundation.

Rowhouse wall seepage

Old brick and stone rowhouse walls leak through mortar joints.

Clay soil pressure

Clay over limestone holds water against walls and causes cracks.

Which basement services do Allentown homeowners need most?

Also available in Allentown: sump pump service, leaking crack repair, and every service on our full list of 19 basement services.

Who serves Allentown, and how does a call work?

Neighborhoods
West End, East Side, South Side, Old Fairgrounds, Center City, Mountainville
County / state
Lehigh County, Pennsylvania

What do Allentown homeowners ask most?

How do I know if a crack in my Allentown home is from a sinkhole?

Sudden or fast-growing cracks, sloping floors or a depression in the yard are warning signs. The Pennsylvania DCNR and USGS maps show carbonate areas; a structural engineer should assess it.

Where should downspouts drain in Allentown?

Spread water over a wide area or pipe it away; never let it pool in one spot near the foundation on limestone.

Do Pennsylvania contractors need to register?

Yes, under the Home Improvement Consumer Protection Act home improvement contractors register with the Attorney General's office.

Where can I verify this information about Allentown, PA?

  1. 1USDA Natural Resources Conservation Service: Web Soil SurveyLook up soil drainage class and shrink-swell potential for any lot in Allentown, PA.
  2. 2U.S. Geological Survey: Sinkholes (Water Science School)How sinkholes form in limestone (karst) areas such as parts of Allentown, PA.
  3. 3U.S. Census Bureau: QuickFactsHousing and population facts for Allentown, PA, including the age of local housing stock.
  4. 4U.S. Environmental Protection Agency: RadonWhy basements in Allentown, PA should be tested for radon, and how sealed sumps fit with mitigation.
  5. 5Federal Trade Commission: Hiring a ContractorWhat to check before hiring: licensing, insurance, written estimates and payment terms.

What should Allentown homeowners read before calling?

Which areas near Allentown are covered?

Need a waterproofing contractor in Allentown?

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.

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