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Keystone Basement Systems

205 31st St
McKeesport, PA 15132
Mon-Fri 8:00am-8:00pm
Sat 8:00am-5:00pm
In business since 2003

Founded by CEO Aaron Stull in 2003, Keystone Basement Systems is a premier basement waterproofing, crawl space encapsulation, and foundation repair contractor serving western Pennsylvania, Ohio, and West Virginia. With a commitment to offering industry-leading products and superior customer service, Keystone Basement Systems is an award-winning, BBB accredited company with an A+ rating. Their experienced experts are ready and waiting to assist you with all your wet basement and crawl space needs!

As an authorized Basement Systems company serving western Pennsylvania, Ohio, and West Virginia, customers can benefit from:

  • Award-Winning Products & Customer Service
  • Trained, Experienced Basement Waterproofing & Crawl Space Repair Specialists
  • Lifetime Warranties - Ask for Details!
  • Financing Options for Qualified Borrowers
  • FREE, No-Obligation Evaluations & Estimates


  • Basement Waterproofing to help prevent basement flooding.
  • Crawl Space Encapsulation to help protect against mold, rot, and moisture problems.
  • Moisture Control for basements and crawl spaces to help prevent mold, rot, and musty odors.
  • Foundation Repair for cracks, bowing walls, uneven floors, and more.

Products Installed:

  • Sump Pumps - Primary & Battery Backup Systems
  • Interior Drainage Systems
  • Crawl Space Vapor Barrier & Encapsulation System
  • Energy-Efficient, Self-Draining Dehumidifier
  • Waterproof, Mold-Resistant Finished Walls & Flooring
  • Foundation Piers & Wall Anchors

Service Area

Keystone Basement Systems proudly serves western Pennsylvania customers in McKeesport, Bethel Park, Cranberry Township, West Mifflin, and nearby. They also serve the areas in and around Wheeling, West Virginia and Belmont, Ohio.

Learn more about Keystone Basement Systems below. When you're ready to fix your wet basement or damp, musty crawl space, contact them to schedule a free evaluation and estimate!

By Bruno W.
"Devin was great. He didn’t pressure me and I..."
By Bruce S.
"I heard about Keystone from a friend that deals with..."
By Tony S.
"Nick was on time very professional and knowledgeable about..."
By Mark W.
"Ken was awesome"
Nancy S.
Sidman, PA
The salesman was very nice and explained things thoroughly. David and his men did an excellent job completing...
Colby L.
Bruceton Mills, WV
My basement is completely dry now. I highly recommend Keystone.
Rolf H.
Stahlstown, PA
I am very pleased with the work.
Keystone Basement Systems Before & After
  • Sagging & Cold Floors Above Crawlspace
    Sagging & Cold Floors Above Crawlspace

    Sagging & Cold Floors Above Crawlspace

    The floor above a crawlspace was cold and was starting to collapse from wood rot. The crawlspace was not encapsulated and as a result was subject to dry rot and was beginning to collapse. 
  • CleanSpace Crawl Space Vent Cover Installation in Terra Alta, WV
    CleanSpace Crawl Space Vent Cover Installation in Terra Alta, WV

    CleanSpace Crawl Space Vent Cover Installation in Terra Alta, WV

    A vented crawl space does more harm than good when the air outside is humid, damp or freezing cold. The open vent allows that air to enter the crawl space causing moisture, structural, and pest problems! As part of this customers crawl space repair, we installed CleanSpace Crawl Space Vent Covers to create an airtight seal from outside elements from getting inside the crawl space. 
  • How to Fix Moldy Basement Walls in Miller Run Pennsylvania
    How to Fix Moldy Basement Walls in Miller Run Pennsylvania

    How to Fix Moldy Basement Walls in Miller Run Pennsylvania

    The walls experienced water damage and leaking. CleanSpace was used to address the wall issues in combination with WaterGuard and the TripleSafe Pump System.
  • Stained and Wet Basement Walls Permanently Fixed
    Stained and Wet Basement Walls Permanently Fixed

    Stained and Wet Basement Walls Permanently Fixed

    The basement exhibited unsightly marks, evidence of prolonged water damage afflicting the residence. Faced with this unattractive sight, the homeowner sought a solution to address this persistent issue. Recognizing the imperative of addressing the root cause, a thorough waterproofing strategy was enacted. This comprehensive approach included the installation of WaterGuard in conjunction with a TripleSafe pump, effectively managing the underlying water infiltration challenge.   With water infiltration successfully mitigated, a transformative measure was undertaken to enhance the basement's visual appeal. A sophisticated CleanSpace wall membrane was skillfully applied, serving a dual function: not only did it intercept any lingering moisture seepage from the walls, but it also imparted a fresh and pristine appearance to the previously marred surfaces. Through this integrated approach, the basement was not only shielded from future water damage but also revitalized to emanate a sense of cleanliness and revitalized energy.
CleanSpace Production Pro Certification

CleanSpace Production Pro Certification

Angi Super Service Award 2022

Angi Super Service Award 2022

Best of the best Westmoreland

Best of the best Westmoreland

Juan Pantojas III

Juan Pantojas III


Chris Bailey

Chris Bailey

Certified Field Inspector

David Anthony Cain

David Anthony Cain


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