Mr. Chimney Waterproofing Services – Stop Leaks Before They Start

Is your chimney showing signs of water damage? From stains and musty odors to crumbling mortar and interior leaks—water infiltration is one of the most common and costly threats to chimneys.

At Mr. Chimney, we specialize in professional chimney waterproofing for both residential homes and commercial buildings throughout New York, Westchester, Stamford, and the greater tri-state area. Whether it’s a family home, apartment complex, retail space, or municipal building, we bring decades of expertise and tailored solutions to every project.

For Homeowners:

We know how important your home is. Our team treats each residence with care, providing durable, discreet waterproofing that protects your chimney—and your peace of mind—for years to come.

For Commercial Property Managers:

We understand the demands of managing multi-unit properties, office buildings, and commercial real estate. Mr. Chimney delivers reliable scheduling, professional documentation, and minimal disruption to tenants and operations. We also offer annual maintenance plans for ongoing protection.

Whether you own a historic brownstone in Brooklyn, manage a high-rise in Manhattan, or oversee a shopping plaza in Yonkers, our experts are ready to help.

 How We Waterproof Your Chimney – Our Proven 6-Step Process

We don’t just waterproof—we protect your entire chimney system with meticulous care and commercial-grade materials.

 Step 1: Thorough Inspection & Repairs

We start by identifying signs of deterioration, including:

• ✓ Cracks, loose or missing bricks
• ✓ Worn mortar joints
• ✓ Damaged flashing
• ✓ Missing or faulty chimney caps
•  

Then, we make all necessary repairs—such as tuckpointing and gap sealing—to prepare the chimney for lasting waterproofing.

  Step 2: Deep Masonry Cleaning

We clean the exterior masonry using a power washer or chimney brush to remove:

• ✓ Dirt, moss, algae, and soot
• ✓ Efflorescence and mold buildup
•  

We clean the surface, ensuring maximum adhesion and penetration of the waterproofing sealer.

  Step 3: Seal Vulnerable Gaps

We apply commercial-grade high-temperature sealants to vulnerable areas like:

• ✓ Flashing seams
• ✓ Crown joints
• ✓ Flue tile gaps
•  

This seals the most common entry points for water.

 Step 4: Apply Professional-Grade Waterproofing Sealer

We apply a silane/siloxane-based sealer from bottom to top to prevent drip staining. These breathable, colorless treatments:

• ✓ Prevent water intrusion
• ✓ Resist UV and weather damage
• ✓ Allow trapped moisture to escape
• ✓ Preserve the look of your masonry

 Step 5: Crown Protection

If the chimney crown is cracked or deteriorating, we apply an elastomeric crown sealer to prevent moisture from penetrating and freezing inside the concrete.

 Step 6: Chimney Cap Installation

We inspect and install stainless steel chimney caps that guard against:

• ✓ Rain and snow
• ✓ Debris and nesting animals
• ✓ Interior leaks caused by downpours

Chimney Waterproofing Solutions by Material

 Brick Chimneys

Common on both historic homes and brownstone walkups.
Recommended Sealers:

• ✓ ChimneySaver Water-Based Repellent
• ✓ Eco Advance Brick Sealer
•  

• Tip: We always repoint damaged mortar before sealing.

 Stone Chimneys

Found in both high-end residences and rustic commercial lodges.
Recommended Sealers:

• ✓ MasonryDefender Stone Sealer
• ✓ ChimneyRx Masonry Water Repellent
•  

• Tip: Watch for flashing leaks between uneven stones.

 Concrete Block (CMU) Chimneys

Typical for commercial rooftops, utility buildings, and modern homes.
Recommended Sealers:

• ✓ RadonSeal Plus Deep Penetrating Sealer
• ✓ Ghostshield Siloxa-Tek 8500
•  

• Tip: We apply two heavy coats to fully saturate the porous block.

 Accessories That Enhance Chimney Protection

• ✓ CrownCoat by ChimneySaver – Durable, flexible seal for aging chimney crowns
• ✓ High-Temp Silicone Sealant (Rutland or GE RTV) – Ideal for flashing and joint reinforcement
• ✓ Stainless Steel Chimney Caps – Block moisture, animals, and unwanted debris

Why Residential & Commercial Clients Trust Mr. Chimney

With over 50 years of experience, Mr. Chimney has earned the trust of thousands of homeowners and building managers. Our clients include:

• ✓ Residential homeowners
• ✓ Property management firms
• ✓ Real estate developers
• ✓ Commercial landlords
• ✓ Municipal buildings and institutions
•  

We offer:

• ✓ Fully licensed and insured technicians
• ✓ On-time scheduling and project transparency
• ✓ Emergency and 24/7 response services
• ✓ Ongoing maintenance programs for year-round protection

Don’t Let Water Destroy Your Chimney – Contact Mr. Chimney Today

Water damage doesn’t always show up right away—but once it does, it’s often expensive to fix. Don’t wait until it’s too late. Let Mr. Chimney waterproof your chimney and safeguard your property.

Call now to schedule a chimney inspection or waterproofing appointment. Serving NYC, The Bronx, Brooklyn, Westchester, White Plains, Stamford, and nearby areas. Emergency and 24/7 service available.