Chimney Flashing Repair in Passaic County, NJ

Chimney flashing is one of the most leak-prone areas on any roof, and in Passaic County -- where thousands of homes built between the 1920s and 1970s feature masonry chimneys -- flashing failures are among the most frequent repair calls we receive. At Paterson Roofing Contractors, we have repaired and replaced chimney flashing on homes throughout every municipality in Passaic County, from the Victorian row houses of Paterson and the brick Colonials of Clifton to the ranch-style homes scattered across Wayne and Hawthorne. Our crews understand the specific challenges that chimney-to-roof intersections present in northern New Jersey's demanding climate.

The chimney-to-roof junction is inherently vulnerable because it involves two fundamentally different materials -- roofing and masonry -- that expand and contract at different rates as temperatures change. In Passaic County, where winter temperatures regularly drop below freezing and summer heat can push roof surface temperatures above 150 degrees, this differential movement is relentless. Over years and decades, the constant cycling loosens sealant, pulls step flashing away from mortar joints, and creates gaps that water exploits during every rain event. Many homes in Paterson, Haledon, and Prospect Park still have original galvanized steel chimney flashing that has corroded through, or tar-based patches applied by previous contractors that provide only temporary relief before cracking and separating.

Proper chimney flashing consists of two integrated components working together. Base flashing, also called step flashing, consists of individual L-shaped metal pieces woven into each course of shingles as they rise along the chimney side. Counter flashing is embedded into the chimney mortar joints and folds down over the top edge of the base flashing, creating a two-layer defense that channels water away from the chimney intersection. When either component fails -- or when both are absent, as we sometimes find on older homes in Haledon and Prospect Park where single-piece flashing or roofing cement was used as a shortcut -- water penetrates the junction and enters the building.

The damage from chimney flashing leaks extends far beyond ceiling stains. Water entering at the chimney intersection saturates roof sheathing, runs along rafters into wall cavities, degrades insulation, and creates ideal conditions for mold and mildew growth. In severe cases, we have discovered rotted framing members and compromised structural connections that resulted directly from years of unchecked chimney flashing leaks. Homeowners in Totowa, Little Falls, and Woodland Park who notice water stains on ceilings near their chimneys should act promptly -- the visible stain represents only a fraction of the moisture that has already infiltrated the building structure.

Our chimney flashing repair process begins with a thorough examination of the entire chimney-to-roof junction. We inspect the condition of existing step flashing, counter flashing, cricket or saddle behind the chimney (if present), and the mortar joints where counter flashing is embedded. We also check the chimney crown, cap, and masonry for defects that may be contributing to water entry independent of the flashing itself. Based on our findings, we provide a detailed written estimate explaining exactly what repairs are needed and why.

When we perform chimney re-flashing, we remove all existing flashing materials, clean the mortar joints, install new step flashing pieces woven correctly into the shingle courses, cut reglets into the mortar joints for counter flashing insertion, set the counter flashing with high-quality polyurethane sealant, and install or repair the chimney cricket to divert water around the uphill side of the chimney. For chimneys wider than 30 inches, a properly constructed cricket is essential to prevent water and debris accumulation behind the chimney -- a detail that many contractors overlook. Property owners throughout North Haledon, Pompton Lakes, and the Highlands communities trust our chimney flashing work because we address every component of the system, not just the visible symptoms. Contact us for a free chimney flashing inspection.