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Moisture intrusion, foundation leaks, and deteriorating masonry can lead to DOB violations. ABC Masonry & Stucco Contractors is a licensed and insured provider of Thorocoat and Thoroseal in NYC. We apply professional cement-based and elastomeric waterproofing systems. Our masonry-trained crews focus on proper preparation, including surface cleaning and substrate evaluation.
When property owners search for Thorocoat and Thoroseal in NYC, they are usually looking for a reliable way to protect masonry from recurring moisture problems. These products are professional-grade coating systems for masonry.
Remember
Unlike standard paint, Thoroseal and Thorocoat are engineered masonry protection systems designed to create durable moisture barriers. Thoroseal provides a 31 – 62 mil cementitious coating for masonry waterproofing, while Thorocoat forms an 8 – 10 mil elastomeric protective film for flexible exterior protection. These systems help resist water intrusion while maintaining vapor permeability to reduce trapped moisture risks.
(Film thickness varies by product, texture, and application)
It is a cement-based waterproof coating. It’s designed for concrete, brick, stone, and block masonry surfaces where moisture protection is required.
It’s made from Portland cement, graded silica sands, and specialized chemical additives. When mixed with water or an acrylic admixture, it forms a dense slurry that bonds with porous masonry surfaces and helps block water penetration.
Common Applications Include:
Concrete and masonry foundations, basement walls, retaining walls, below-grade structures, elevator pits, concrete block (CMU) walls, and other moisture-prone masonry surfaces.
Thorocoat is a 100% acrylic elastomeric masonry coating. It’s made for above-grade exterior surfaces and building facade systems.
It’s formulated with high-build acrylic polymers. Unlike rigid cementitious coatings, its flexible composition allows it to expand and contract with normal masonry movement while maintaining protection against weather exposure.
Common Applications Include
Exterior brick facades, stucco, EIFS, concrete walls, above-grade masonry, parapet walls, rooftop structures, commercial buildings, and exterior surfaces requiring flexible weather protection.
The right system depends on the location of the moisture problem, the type of substrate, and the level of exposure. Here’s a quick overview.
Application Area | Thoroseal Waterproofing & Foundation Coating | Thorocoat Waterproofing Services NYC |
Foundations | Best for porous concrete and masonry foundations exposed to moisture | Not typically used for buried foundation applications |
Basement Walls | Helps reduce water penetration through damp masonry and concrete | Better suited for above-grade exterior wall protection |
Below-Grade Masonry | Designed for areas exposed to soil moisture and water pressure | Not intended as the primary below-grade waterproofing layer |
Concrete Block (CMU) | Seals porous block walls and masonry foundations | Protects exposed CMU surfaces requiring flexible weather protection |
Exterior Brick Walls | Used where cementitious waterproofing is required | Ideal for above-grade brick exposed to rain and weather |
Building Facades | Provides moisture resistance but is not a decorative finish coating | Provides flexible protection with a finished exterior appearance |
Stucco & Exterior Masonry | Used for cement-based waterproofing needs | Common choice for flexible stucco and masonry surface protection |
NYC buildings experience constant moisture stress. When moisture enters porous masonry and freezes, it expands by approximately 9%, creating internal pressure that accelerates material breakdown.
More than half of housing units constructed before 1947 have poor moisture management. But now advanced systems provide protection based on the building condition and substrate.
Proper waterproofing also supports Local Law 11 (FISP) facade safety requirements and Local Law 126 parapet inspection obligations. Because it addresses moisture-related deterioration before it develops into larger building envelope concerns.
Property owners should pay attention to:
White mineral deposits appearing on brick or concrete indicate moisture movement through the material.
Persistent odors, wet spots, or staining often point to foundation moisture problems.
Flaking or damaged brick and concrete surfaces may indicate repeated freeze-thaw damage.
Discoloration near foundation walls or exterior masonry can signal hidden moisture migration.
Even small cracks can become pathways for water intrusion if they are not repaired before coating application.
ABC Masonry & Stucco Contractors provides complete protective coating services for residential and commercial properties across NYC.
Foundation walls face constant exposure to groundwater and soil moisture. Our crews prepare surfaces, repair defects, and apply appropriate cement-based protection designed to improve moisture resistance and durability.
Basements are among the most common areas affected by moisture problems. We address damp masonry, foundation surfaces, and water entry points before applying protective systems. Proper evaluation ensures maximum compliance.
Stoops and porches endure heavy foot traffic combined with constant weather exposure, making them prone to surface cracking and water absorption. Meanwhile, coating protects these high-use concrete and masonry surfaces.
Retaining walls face some of the highest sustained moisture exposure of any masonry structure, with soil pressure and groundwater working against the wall. We apply formulations specifically suited to below-grade applications to protect retaining wall integrity.
Brick buildings across Brooklyn and the Bronx often require additional protection due to their age and exposure. Our approach includes cleaning masonry surfaces, repairing cracks and damaged joints and applying compatible protective coatings.
The longest-lasting applications begin before the coating is installed. Our process includes surface inspection, removal of loose debris, efflorescence cleaning, crack filling and checking substrate compatibility.
Concrete decks, terraces, retaining structures, and exposed masonry areas can deteriorate when moisture repeatedly enters the surface. Protective coating systems help improve resistance against weather exposure.
Assess substrate condition, cracks, deterioration, and moisture levels to confirm the surface is suitable for coating.
Clean and prepare masonry to achieve proper adhesion, targeting a CSP 3 - 4 surface profile through methods such as 3,000 - 3,500 PSI pressure washing when required.
Repair open cracks, deteriorated joints, and damaged areas before coating to reduce moisture pathways and improve performance.
Choose either one coating or a combined system based on substrate type, exposure, and moisture conditions.
Apply coatings according to manufacturer requirements, including thickness and curing standards. Elastomeric systems provide flexibility with up to 300% elongation.
Review completed work for coverage, finish quality, and proper application to ensure durable masonry protection.
With 18+ years of masonry and exterior restoration experience, we evaluate brick, concrete, stucco, CMU, and historic masonry conditions before applying any systems.
Our projects follow applicable NYC DOB requirements and OSHA safety practices, with proper planning for scaffolding, lifts, and elevated exterior work.
We analyze substrate type, moisture exposure, hydrostatic pressure, and existing damage to determine which approach is best for your project.
NYC has over 1 million buildings and structures, from pre-war brownstones to modern commercial properties. We understand how different masonry systems respond to moisture and weather.
With 38,000+ landmarked properties and sites in NYC, restoration work often requires careful material compatibility and appearance considerations.
Our written estimates detail surface preparation, repairs, coating selection, access requirements, and project scope before work begins.
We serve brownstones, co-ops, condos, apartment buildings, commercial properties, and mixed-use buildings across all five NYC boroughs.
Manhattan
Upper West Side Brownstones | Harlem Buildings | Midtown Commercial Properties | Financial District Offices | Landmark Buildings
Brooklyn
Park Slope Brownstones | Brooklyn Heights Properties | Bed-Stuy | Crown Heights | Carroll Gardens | Mixed-Use Buildings
Queens
Astoria Properties | Long Island City Buildings | Flushing Commercial Properties | Jamaica Residential Buildings
The Bronx
Brick Apartment Buildings | Concrete Block Structures | Multifamily Properties | Commercial Buildings
Staten Island
St. George Properties | Tottenville Homes | Residential Foundations | Masonry Exteriors | Commercial Properties
Don’t wait for efflorescence, basement dampness, or a failing facade coating to become a costly structural problem. ABC Masonry & Stucco Contractors provides free on-site evaluations.
We share detailed written estimates for Thorocoat and Thoroseal waterproofing across Manhattan, Brooklyn, Queens, the Bronx, and Staten Island.
info@stuccocontractorsnyc.com
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