(800) 508-4144

Our Main Services

Basement Waterproofing Services

Basement Waterproofing

Nothing is more frustrating than dealing with a wet Malvern, PA basement. Knowing the causes of wet basements and how to prevent water damage can help avoid this frustration.

French Drain Installation

French Drains

There are basically two ways to waterproof a Malvern, PA house or building. The first and most common way is from the inside using a French Drain…

Exterior Waterproofing Services

Exterior Waterproofing

An exterior drain system does not allow any moisture inside a Malvern, PA basement or crawl space. This system diverts all water before it is able to come in contact with your foundation.

Sump Pumps and Backup Systems

Sump Pumps

When water finds its way into the basement of a structure, the owner needs to remove it because it could lead to mold infestation and weaken the basement foundation walls.

Lawn Drainage & Grading Solutions

Lawn Drainage

If excessive water often accumulates around your home’s foundation and lawn, you may be in need of a lawn drainage system. Our pros specialize in lawn drainage and grading.

Foundation Repair Services

Foundation Repair

We diagnose a multitude of problems that can occur in basements, including cracks, movement, leaning, bulging or bowing.

Basement Egress Windows

Basement Egress Windows

Waterproofing One can easily add a basement egress window system to improve the look, safety, and provide an easy exit from your basement.


Wall & Floor Coatings

Wall & Floor Coatings

Ensure that your basement is truly protected from water intrusion. Let us seal your basement’s concrete floors and foundation walls.

Gutter Guards & Cleaning

Gutter Guards & Cleaning

Protect your home from water damage and make gutter cleaning easy with our professional gutter guards and gutter cleaning services.

Drywall Installation & Repair

Drywall Installation & Repair

Our experienced team will make sure your walls look great. Get quality workmanship and customer satisfaction guaranteed.

Hardscape Paver Installation

Hardscape Paver Installation

Transform your outdoor space with our professional hardscape paver installation services. We’ll create a unique & durable outdoor living space.

Hardscape Paver Cleaning & Sealing

Hardscape Paver Cleaning & Sealing

Bring life back to your outdoor spaces with our professional hardscape paver cleaning and sealing services.

Instant Quote for your Project

“We have been a basement waterproofing company for over 20 years, proudly serving residents in the Delaware Valley region. We offer superior craftsmanship with fair pricing to all of those in need of basement waterproofing and related services.”

Joseph Soster

Free Consultation & Estimates

    Choose service(s):

    Basement WaterproofingFoundation RepairFrench DrainExterior WaterproofingLawn Drainage/GradingSump PumpBasement Egress WindowsWall/Floor CoatingsGutter CleaningGutter GuardsPaver Cleaning & SealingRoofing
    Tell me about discount packages available for the multiple services selected above

    See our reviews from all across the web on Favorite Contractors:

    4.8 Stars – 491 Reviews from 5 Sources

    Hydrostatic Water Pressure Wall Collapse

    Hydrostatic Water Pressure Wall Collapse
    Wall Collapse from Hydrostatic Water Pressure
    Wall Collapse caused by Hydrostatic Water Pressure
    Close-up of a collapsed wall caused by hydrostatic pressure

    Below is an Example of What Can Happen When Cracks in the Foundation Go Ignored

    Click or tap on any of the images for a larger view.

    Step Cracks in the foundation

    Horizontal Cracks in the Foundation.
    An immediate indicator of a failing foundation.

    Step cracks in the foundation walls

    Step Cracks in the Foundation.
    These are a sign that your foundation is in need of immediate repair!

    Collapsing foundation walls

    Collapsed Foundation Wall (Picture 1)

    Foundation walls collapsing. Basement foundation repair &  waterproofing company

    Collapsed Foundation Wall (Picture 2)

    Basement foundation failure & flooding

    The resulting disaster from a collapsed wall and flooded basement. Don’t let this happen to your home’s basement!

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    Dive into summer savings with our waterproofing solutions! Enjoy 10% off during our summer sale and a free consultation at your convenience. From French drains to sump pumps, we've got you covered for a dry, worry-free season. Don't let leaks rain on your parade – contact us now! ☀️

    #summersale #waterproofing #staydry
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    !ckorfgpfd Dr o vivo rooftopdigo fee c

    The repair of these defects takes a professional to recognize and diagnose the multitudes of problems that can occur in basements.
    Contact us today!
    (800) 508-4144

    #foundationrepairservices #waterproofingone #foundationrepaircontractors #shrinkagecracks #structuralcracks #pouredconcrete #brickwalls #stonefoundationwalls #carbonfiberstraps
    ... See MoreSee Less

    The repair of these defects takes a professional to recognize and diagnose the multitudes of problems that can occur in basements.
Contact us today!
(800) 508-4144 

#foundationrepairservices #waterproofingone #foundationrepaircontractors #shrinkagecracks #structuralcracks #pouredconcrete #brickwalls #stonefoundationwalls #carbonfiberstraps
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    is the premiere specialty contracting and basement waterproofing company under Soster General Contractor, LLC, for basement waterproofing and foundation repair in the Greater Philadelphia PA, Montgomery County PA, Chester County PA, Berks County PA, Bucks County PA, and Delaware County PA areas. Our headquarters is located in Phoenixville, PA.

    Need Financing Plans?

    Why Waterproof a Malvern, PA Basement?

    The best way to maintain or increase your Malvern property value is to improve your home through repair, expansion, and remodeling. Basement waterproofing is one of the ways you can help keep your Malvern property value high while saving your foundation from potential disastrous situations brought on by rain. If water seeps into your basement, that is a bad sign. Basement leaks can mean your foundation is in need of repair to keep the walls from cracking or growing mold which can be deadly to your family.
    There are two ways to waterproof your basement, using either an Interior or Exterior Hydro-Static Pressure Relief System.

    Interior Waterproofing System

    An interior drain system is the cheaper route, but can still allow some water to come in.


    Waterproof a Basement or Foundation

    They made sure the carpets were protected, they put plastic up around the job so dust did not go through the house, very professional and did a great job.

    Catherine D. / Aston, PA

    Install or Replace Foundation Drains

    Professional and competent

    Neha P. / Philadelphia, PA

    Thanks for your excellent work.  I know you are a man of your word and will finish the EZ Breath installation once the sheetrock is done. I did not see the need to hold the $100 as you suggested. I look forward to hearing from you soon about the estimate for re-finishing the sheetrock, and the estimate for laying down the vinyl flooring. Thanks again!

    Behzad Pavri

    Joe Soster and his crew installed a basement waterproofing system and a sump pump in my home. The quality of work was simply awesome; the crew respected our home, worked hard, and produced a great final product. The price was very reasonable. I am very satisfied!

    Mark Moore

    Thank you and your crew for working on the various parts of my house. You’ve helped me out in more ways than you could know, taking away much of the burden. I’m appreciative of the fact that you billed my only for the men’s time on the last day.

    Susan May

    Verified 5 Star Contractor

    4.8 Stars – 491 Reviews from 5 Sources


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    (800) 508-4144

    Waterproofing One

    4093 Hollow Rd
    Phoenixville, PA 19460

    Serving Pennsylvania, New Jersey and Delaware

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    Pa Lic#: Pa057647
    NJ Lic#: 13VH09291700
    DE Lic#: 17-92051-13-000

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