Basement Waterproofing in Port Washington, WI

Basement waterproofing contractors stop water from entering below-grade spaces and manage the water that collects around a foundation. They diagnose where moisture comes from and install systems such as interior drainage, sump pumps and exterior membranes.

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Common basement waterproofing services include:

  • Interior perimeter drainage systems
  • Sump pump installation, replacement and battery backups
  • Exterior foundation waterproofing membranes
  • Sealing cracks and wall penetrations
  • Window well and egress window drainage

Call a waterproofing contractor when your basement leaks after rain, you see damp walls, efflorescence or puddles, or your sump pump runs often or has failed. Yard runoff and grading problems are handled by drainage contractors.

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GSI Foundations

GSI Foundations

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Germantown, WI Basement Waterproofing

GSI Foundations is a Germantown, Wisconsin–based foundation repair and basement waterproofing company serving the Greater Milwaukee area since 2003. GSI Foundations offers interior and exterior waterproofing (including drain tile installation), foundation crack repair, bowing wall stabilization, transferable warranties, and services tailored to homeowners, home buyers, sellers, realtors and investors; the company combines proven industry techniques, trained crews and in-house assessments to prevent and repair water and structural damage and aims to protect homeowners’ investments while providing responsive, professional service.

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Basement Waterproofing Questions and Answers

What does a basement waterproofing contractor do?

A basement waterproofing contractor finds where water is getting in and installs solutions such as interior drain tile and sump pumps, exterior waterproofing, crack sealing and window well drainage to keep the basement dry.

Why does my basement leak?

Common causes include water pressure in saturated soil, cracks or gaps in foundation walls, leaks where the wall meets the floor, poor grading, overflowing gutters and failing window wells. Identifying the source helps decide between interior and exterior solutions.

How do I choose a waterproofing contractor?

Get more than one opinion, ask each contractor to explain where water is entering and why their solution fits, and compare written warranties. Be cautious of recommendations that ignore simple fixes such as downspout extensions or grading.

What affects the cost of basement waterproofing?

Cost depends on the basement's size and finish, the method used, the length of drainage installed, sump pumps and backups, excavation for exterior work, and access around the house. Finished basements may need walls or flooring removed.

How should I prepare for basement waterproofing work?

Move stored items, furniture and finishes away from the basement walls where crews will work, and expect dust and noise during installation. Ask where discharge lines will run outside and whether an electrical outlet is available for a sump pump.