cAMBRIDGE MA STONE FOUNDATION PRESERVATION - RESTORATION - WATERPROOFING

If your home was built in Cambridge before 1920, its foundation tells a story. From the Roxbury Puddingstone quarried in our backyard to the hand-laid granite blocks and lime mortar that define the New England aesthetic, these structures were built to last—but they require specialized care that modern "quick-fix" contractors don't understand.

Modern concrete is rigid. Historic Cambridge foundations are living systems. Using the wrong materials—like modern Portland cement or waterproof sealants—can trap moisture and cause your fieldstone or rubble walls to deteriorate from the inside out.

• Roxbury Puddingstone Stabilization: We specialize in the unique geometry of conglomerate stone foundations, ensuring your "rubble" walls remain structurally sound.
• Authentic Lime Mortar Repointing: We use custom-blended Natural Hydraulic Lime (NHL) to match the breathability and flexibility of your original 19th-century mortar.
• Granite & Brick Transition Repair: Is your exterior granite cap shifting? We realign and repoint the visible "water table" of your home to restore its curb appeal and structural integrity.

Since 1965, the Thompson Crowley family has been the trusted name for restoring the "First Period" and 19th-century homes that define Cambridge, MA. While many contractors treat a basement as just another room, we treat it as a structural preservation project.

From the Roxbury puddingstone foundations of Mid-Cambridge to the granite-topped brick structures near Harvard Square, we understand the specific geology and chemistry of New England’s historic masonry.