Knapp Masonry LLC
Verified Traditional Trades Specialist • 1 Villa Ave • Est. 2005
About the Contractor
Knapp Masonry LLC specializes in historic preservation and traditional masonry restoration across Greater Philadelphia and southern New Jersey. Mentored by regional preservation architects and engineers, the firm works exclusively with breathable, low-strength lime mortars formulated according to ASTM C270 Type O, Type K, and natural hydraulic lime standards to protect soft historic brick and stone from catastrophic spalling.
Verified Restoration Specialties
- Natural Hydraulic Lime (NHL) Repointing
- Historic Brick & Stone Replacement
- Brownstone & Terracotta Repair
- Dutchman Stone Restoration
Project History & Regional Experience
Extensive restoration work on landmark civic institutions, historic churches, and 18th- and 19th-century residential facades throughout Philadelphia's Center City, Society Hill, and Fairmount historic districts.
Preservation Standards & Quality Guarantee
This contractor adheres to traditional historic restoration principles, avoiding destructive modern shortcuts such as non-breathable Portland mortars on soft historic brick or replacement vinyl inserts in protected historic districts.