Waterproofing One

4.8(115 reviews on Google)

Based in Phoenixville, PA · listed on the Malvern page

Call (484) 410-4110 Visit website

About Waterproofing One

Waterproofing One is a basement waterproofing and foundation repair company in Phoenixville serving West Chester, Pottstown, Wayne, Drexel Hill and nearby towns, with more than 25 years of experience. Services include interior and exterior waterproofing, French drains, sump pumps with battery backups, basement crack repair, wall stabilization for bowed walls and horizontal masonry cracks, crawl space repair, egress and block windows, and lawn drainage. It also handles mold remediation, retaining walls, stucco inspection, gutter cleaning and installation, and paver cleaning and sealing. Quotes are free, financing plans are offered, and the company states it is licensed and insured. Rated 4.8 from 115 Google reviews, 106 of them five stars. Online instant quotes are offered, and the company also posts articles and answers to common questions.

What reviewers mention: basement work (24), sump pump installation (16), french drain (9), detailed inspection (6), meticulous crew (6), quick job completion (4), foundation repair (4), basement wall repair (3), crawlspace waterproofing (2), drain system installation (2)

Where Waterproofing One works

Based in Phoenixville, Pennsylvania. Its website also names Malvern, Exton, Berwyn, West Goshen Township, Collegeville, King of Prussia, West Chester, Downingtown and other towns. Call to confirm they cover your address.

Services and details

  • Foundation or waterproofing work

    Yes

  • Foundation repair

    Yes

  • Basement waterproofing

    Yes

  • Bowing wall repair

    Yes

  • Crack repair

    Yes

  • Crawl space repair

    Yes

  • Sump pumps

    Yes

  • Drain tile and drainage

    Yes

  • Egress windows

    Yes

  • Free inspection or estimate

    Yes

  • Financing

    Yes

  • States a license

    Yes

No information yet on piers for settling, concrete lifting, warranty. The website did not say; call and ask.

Contact

Details last checked against the company's website and Google listing on 2026-10-09. Report a correction or request removal. Back to foundation repair companies in Malvern.