Waterproofing Solutions
Professional Waterproofing Services in Pennsylvania & Maryland
Stop water damage before it starts. Whether your basement is damp, leaking, or prone to musty odors, Keystone Foundation Repair offers complete interior and exterior waterproofing services for homes and businesses across Pennsylvania and Maryland.
Our waterproofing systems are designed to seal out moisture, protect your foundation, and keep your home healthy for years to come. With more than three decades of experience, Keystone combines trusted materials, certified technicians, and long-term warranties to deliver results you can count on.
Scroll down to see the waterproofing solutions we provide, then click to request a free inspection and get expert guidance.
Signs You May Need Waterproofing
Moisture intrusion often starts small, just a damp corner or minor discoloration, but it can quickly lead to mold, odor, and even structural damage.
Common signs you may need waterproofing include:
- Musty or humid air in your basement or crawl space
- Water stains or bubbling paint on walls and floors
- Cracks in foundation walls or concrete floors
- Standing water near foundation walls after rain
- Mold, mildew, or efflorescence (white residue)
- Leaks near basement windows, stairwells, or pipe penetrations
If you’re seeing any of these signs, don’t wait, contact us today. Small leaks can cause major foundation issues over time. Learn all about waterproofing and how different systems protect your home.
Our Interior & Exterior Waterproofing Solutions
Every structure and soil condition is unique, which is why Keystone Foundation Repair designs custom waterproofing systems, not one-size-fits-all fixes. We combine modern materials and proven installation methods to deliver permanent protection.
Exterior Waterproofing
We install rubberized elastomeric Mar-Flex membranes, available in one to four protective layers, along with drainage boards to shield your foundation walls from moisture intrusion. These systems are applied during excavation and come backed by a Lifetime, Transferable Warranty, giving you lasting protection and added resale value for your home.
Homeowners with new poured concrete walls can also benefit from extended material warranties when Mar-Flex systems are applied during construction.
Interior Waterproofing
Our interior solutions protect from the inside out, controlling water that seeps through walls or under the floor slab:
- Perimeter Drain Systems (French Drains): Sub-floor channels that collect and redirect water into a sump pump basin.
- Sump Pumps & Daylight Drains: Efficient discharge systems that keep basements dry even in heavy storms.
- Urethane Crack Injection: Expanding hydrophobic foam injected into foundation cracks, works on both wet and dry surfaces with minimal mess.
- Vapor Barriers & Wall Coatings: Prevent moisture vapor and odors from entering your living space.
- Crawl Space Encapsulation: Sealing and insulating crawl spaces to eliminate humidity and mold.
Commercial & Building Waterproofing
We also provide commercial waterproofing construction services for new buildings, retaining walls, and below-grade structures. Our systems meet or exceed FHA and VA standards and are installed by trained professionals experienced in large-scale applications.
Why Choose Keystone Foundation Repair for Waterproofing
Since 1989, Keystone Foundation Repair has been trusted by homeowners, builders, and property managers throughout Pennsylvania and Maryland. Here’s what sets us apart:
- Lifetime, Transferable Warranty: Our waterproofing systems are backed by long-term protection that transfers to future homeowners, boosting your property’s value.
- Trained and Certified Technicians: Our team stays current on the latest waterproofing construction techniques.
- Fully Insured & Warranted Work: Every project is protected by our workmanship guarantee.
- Efficient Installations: Many projects can be completed in one day, no major excavation required.
- Custom Solutions: We evaluate each property and design the right system for your specific needs.
- Proven Products: We use top-quality materials like Mar-Flex membranes and polymer sealants for long-lasting results.
- Health & Value Benefits: A dry basement prevents mold, protects air quality, and improves resale value.
When you need a dependable waterproofing company that stands behind their work, you can count on Keystone Foundation Repair.
Our Featured Projects
Request a Free Waterproofing Estimate Today
Don’t let water slowly damage your home’s foundation. Request a free waterproofing inspection from Keystone Foundation Repair today and protect your investment for the long term.
Our specialists will identify where water is entering, explain your options, and recommend the most effective interior or exterior system for your home or business.