Waterproofing in Philadelphia, PA
Commercial waterproofing seals the vulnerable transitions where most leaks actually start — parapet walls, deck-to-wall joints, plaza decks, and below-grade areas. It uses membranes, sealants, and flashing details engineered for standing water and thermal movement, not the shingles-and-underlayment approach used on sloped residential roofs.
Top Waterproofing Contractors in Philadelphia
Listings updated July 2026
Riley Roofing
Philadelphia, PA
Riley Roofing provides flat roof restoration, membrane repair, and exterior envelope services for commercial properties...
DISCOUNTED ROOFING LLC
Philadelphia, PA
Licensed commercial roofer in Philadelphia serving flat & low-slope roofs with GAF, Firestone & Owens Corning materials....
Forline Roofing
Philadelphia, PA
Philadelphia flat-roof specialist offering modified bitumen, coatings, TPO, EPDM, 24/7 emergency response, and a 12-year...
Al's Commercial Roofer
Philadelphia, PA
Al's Commercial Roofer serves Philadelphia, PA, NJ & DE with flat roof installation, repair, coatings & inspections — fr...
Commercial Industrial Roofing
Philadelphia, PA
Commercial Industrial Roofing delivers expert flat roofing solutions for Philadelphia, PA facility managers — TPO, EPDM,...
Commercial Roofing Philadelphia
Philadelphia, PA
Al's Roofing offers commercial roof installation, replacement, repair & coatings with up to 20-year warranties across Ph...
Up On The Roofs
Philadelphia, PA
Philadelphia flat-roof specialist serving commercial & multifamily properties across PA, NJ & DE. Dual-licensed with in-...
Loonstyn Roofing
Philadelphia, PA
Philadelphia commercial roofer serving flat, EPDM & modified bitumen systems across PA and South Jersey since 1976. Repa...
Big Joe's Roofing
Philadelphia, PA
GAF-certified Philadelphia commercial roofer specializing in TPO, EPDM & flat roofs. Serving 5-county region with 24/7 e...
Champion Roofing & Construction
Philadelphia, PA
Champion Roofing & Construction provides commercial roofing services in Philadelphia, PA, specializing in flat and low-s...
Metal Roofing Philadelphia
Philadelphia, PA
Philadelphia commercial metal roofing contractor offering installation, replacement & repair of metal, TPO, and EPDM sys...
Pace Roofing LLC
Philadelphia, PA
Pace Roofing LLC delivers 24/7 commercial roofing services in Philadelphia, PA — TPO, flat, metal, inspections, new cons...
Primo Roofing and Siding
Philadelphia, PA
Primo Roofing & Siding offers licensed commercial roofing installations and repairs in Philadelphia, PA — free estimates...
Top Tier Roofing
Philadelphia, PA
Top Tier Roofing provides commercial flat and low-slope roofing services in Philadelphia, PA — TPO, EPDM, modified bitum...
Hybrid Roofing and Renovations
Philadelphia, PA
Philadelphia-area commercial roofing contractor serving PA, NJ & DE — flat roofs, fiberglass systems, repair, replacemen...
Liberty Roofing Inc.
Philadelphia, PA
Philadelphia commercial roofer offering EPDM, modified bitumen, BUR & coatings. A+ BBB, 24/7 emergency service, owner-di...
Philly Roofing & Exterior Services
Philadelphia, PA
Philadelphia commercial roofing contractor offering flat roof repair, renovation & 24/7 availability for office, retail...
Advanced Roofing Technologies | Philadelphia Flat Roof Repair, Replacement and Installation
Philadelphia, PA
Philadelphia commercial flat roofing contractor offering LOTUS liquid membrane, TPO, EPDM & PVC with a 10-yr NDL warrant...
Philadelphia Quality Roofing
Philadelphia, PA
Philadelphia Quality Roofing offers certified TPO, EPDM, PVC & modified bitumen systems with 24/7 commercial repair acro...
Ironclad Construction & Roofing
Philadelphia, PA
Ironclad Construction & Roofing delivers commercial roofing in Philadelphia, PA — TPO, EPDM, metal & more for offices, w...
What to Expect from Waterproofing
Initial consultation and site assessment
Leak-source diagnosis (not just the visible interior stain)
Written proposal with detailed scope of work
Repair matched to your existing system to protect the warranty
Final walkthrough and documentation
Waterproofing Pricing in Philadelphia
Pricing varies by contractor and project scope
Request quotes from multiple contractors to compare pricing. Factors that affect cost include system size, building type, equipment brand, warranty terms, and urgency. Always ask for an itemized written estimate before authorizing work.
Get free quotes from Philadelphia contractorsRelated Repair Services in Philadelphia
Frequently Asked Questions — Waterproofing in Philadelphia
How much does waterproofing cost in Philadelphia, PA?
Waterproofing costs in Philadelphia vary based on system size, building type, and scope. Request quotes from multiple contractors through My Roofing Tech to compare pricing. Always ask for itemized written estimates before authorizing any work.
How do I choose the best waterproofing contractor in Philadelphia?
Look for contractors with specific experience in commercial roofing (not just residential). Verify their state license, insurance, and bonding, and confirm they're certified and experienced with your roof system. Check reviews from similar commercial properties. Ask about their workmanship warranty and their typical response time for follow-up issues.
How long does waterproofing typically take?
The timeline depends on the size and complexity of your roof system and the scope of work. Simple repairs often complete in a few hours. Larger installations and replacements may take several days to a few weeks. Emergency service typically stabilizes the problem within hours even when the permanent fix requires returning with materials.
Is waterproofing covered by building insurance?
Generally, sudden storm or accidental damage may be covered by commercial property insurance, while gradual wear and deferred-maintenance issues are not. Contact your insurance provider and ask specifically about coverage for your roof system. A documented inspection report strengthens any claim you file.