Masonry Chimney Repair & Restoration

Common Chimney Problems We Solve

Long Island chimneys face a tough climate: wind-driven rain, salt air, and freeze–thaw cycles that pry open tiny cracks. Over time, you may notice spalling brick, sandy joints, water stains near the chase, or a crumbling crown. Our approach is to stop the water, restore structure, and build details that last—no band-aids.

Brick Replacement & Structural Repair

When brick faces pop or entire units loosen, we source replacements to match size and look as closely as possible. We remove damaged units cleanly, repair backing as needed, and reset with compatible mortar. If damage is localized, we target only the affected area; when failures are widespread, we’ll recommend a partial rebuild for durability. Before any finish work, we address causes—like a cracked crown or poor flashing— so the repair stays sound.

Crown Repair & Rebuild

A failing crown is the number one path for water. We remove loose material, form proper slope, and include a drip edge to throw water clear of the brick below. Small fissures can sometimes be restored; thin or fractured slabs typically need a rebuild. Pairing the rebuild with a well-sized chimney cap keeps vertical rain out and protects the new work. For full details, see our crown repair page.

Pointing (Tuckpointing) & Joint Restoration

Weak joints invite water. We grind to sound depth, pack compatible mortar, and tool for clean water shed. This strengthens the wall and stops capillary pathways. Learn more on our chimney pointing page, including how we color-blend and protect the work after curing with breathable waterproofing.

Flashing & Leak Repair

Leaks often start where the chimney meets the roof. We correct missing or mis-lapped step pieces, install reglet-set counter flashing, and add a cricket where needed so water flows around the stack. See flashing & leaks for the step-by-step.

Relining & Draft Corrections

If clay tiles are cracked or the flue is the wrong size for the appliance, a stainless liner restores a continuous, properly sized path for exhaust—improving draft and safety. We insulate when required for performance and code.

Finish with Protection

After repairs cure, we apply breathable silane/siloxane waterproofing to slow absorption without trapping vapor. This step dramatically reduces future freeze–thaw damage and staining.

Our Repair Process

1. Inspection & photos: Document damage and causes—crown, cap, flashing, joints, brick condition, and interior signs.
2. Plan the fix: We propose the smallest durable solution: targeted brick swap, partial rebuild, pointing, or top-end reconstruction.
3. Execute cleanly: Protect roof and siding, collect debris, and keep work areas tidy day to day.
4. Weather details: Rebuild crowns, fix flashing, and cap properly so new work is protected.
5. Protect & maintain: Apply breathable waterproofing after cure and outline maintenance intervals.

Symptoms You Shouldn’t Ignore

• White salt (efflorescence) streaks and damp masonry that lingers after rain
• Loose brick faces or flakes near the top courses—classic freeze–thaw damage
• Interior ceiling stains or musty odor near the chimney chase
• Cracked crown with ponds of water or gaps at the flue collar
• Tarred or taped flashing “patches” that fail after storms