Philadelphia's Trusted Masonry Experts

The team rebuilt our Fishtown twin's crumbling chimney in 4 days—matched the 1920s brick perfectly and installed a custom copper cap that handles wind gusts off the Delaware. No more rainwater pouring down the flue during storms.

Our Society Hill townhouse needed historic mortar replication for preservation board approval. Onyx's masons analyzed samples and recreated the original oyster shell lime mix so accurately the inspectors thought it was untouched. Worth every penny.

The bluestone patio they built in our Chestnut Hill backyard has survived two Philly winters without a single shifted stone. They even matched the irregular edges on our existing walkway stones—no easy feat. Crew was in/out with minimal disruption.

After three contractors failed to stop our Manayunk basement leaks, Onyx's waterproofing system finally did the job. Their parging has a subtle texture that looks original to our 1930s stone foundation. Dry for 18 months and counting.

When our Roxborough home's foundation shifted 2 inches, Onyx installed helical piers in tight quarters without damaging mature plantings. Two years later, all doors still close smoothly—a first in the 15 years we've lived here.

Repointed our entire Northern Liberties loft building's facade ahead of sale. Crew worked nights to avoid disrupting businesses below. Mortar color matched despite 4 different brick types across the facade. Buyer's inspector called it 'textbook quality.'