Chimney Flashing & Leak Repair

Chimney Flashing & Leak Repair: Sealing Your Roof

A leak near your chimney is rarely just a loose shingle. In the Pacific Northwest, chimney flashing failure is the #1 cause of structural water damage. If you see stains on your ceiling, your home’s primary defense system has already been compromised.
CSIA - Chimneyz

Why Chimney Repair Matters

Why Standard Flashing Repairs Often Fail

Most contractors treat flashing as an afterthought. They nail down some metal, caulk the edges, and leave. But without a proper Full Junction Diagnosis, water will eventually find a way back in through the roof deck or behind the counter flashing. At Chimneyz, we don’t just “patch” leaks with roofing cement. We specialize in the complex Chimney to Roof Junction. While standard roofers might replace a single piece of tin, we treat the entire transition as one integrated system.

From step flashing to crickets and saddles, we ensure that the most vulnerable intersection of your home is 100% watertight against Washington’s relentless rain. Our comprehensive inspection includes ensuring the metal is properly stepped into the shingles and deeply embedded into the masonry mortar joints. If your chimney is wide, it needs a “cricket” to divert water; we assess if your roof’s geometry is actually causing the leak and rebuild it if necessary.

We don’t just cover up the damage. We inspect the plywood decking around the chimney for rot or mold caused by long-term seepage. We are the only contractor in Greater Seattle that understands both the roofing side and the masonry side, ensuring a seamless, leak proof seal between the สอง. You shouldn’t have to call a roofer for the shingles and a mason for the chimney. Chimneyz owns the entire scope and fixes the root cause of the leak, not just the visible symptoms.
Veteran & senior programs - Chimneyz

How We Work

Our Leak Repair Process

We follow a diagnostic process designed to identify the exact point of failure in the roof to chimney connection.

Full system inspection

We never guess. Before any work begins, we inspect every component: Step flashing, counter flashing, crickets, saddles, and the roof deck under one cohesive plan.

01

Define the Scope

No subcontractors. No finger-pointing. Our crew handles both the roofing side and the masonry side under one clear scope so nothing falls through the cracks.

02

Execute the Repair

We follow GAF-approved installation practices and professional masonry standards. We ensure the flashing is deeply embedded into the mortar joints for a permanent seal.

03

Verify & Document

Before we finish, we verify that the geometry of the roof properly diverts water away from the chimney. We document the fix to ensure the junction is 100% watertight.

04

Our Projects

Real WORK. REAL Results.

See how we’ve helped homeowners across Seattle and surrounding areas solve chimney, roofing, and masonry problems with clear scopes and lasting repairs.

metal_roof

Standing Seam Metal Roof Replacement & Structural Integration in Seattle, WA

Seattle, WA

chimney rebuild

Structural Chimney Rebuild & Masonry Restoration in Sammamish, WA

Sammamish, WA

FirePlace

Freestanding Gas Fireplace Installation in Mercer Island, WA

Mercer Island, WA

Why Chimneyz

The Only Specialist for the "Full Junction"

Chimneyz is the choice for homeowners who want to solve “impossible” leaks. With 400+ five-star reviews, we have built a reputation for fixing what other contractors walk away from. We are GAF Certified and licensed in Washington State, meaning our dual expertise covers both the roofing systems and the chimney structures that meet them. We understand exactly how PNW weather puts pressure on your seals.

CSIA Certified

Chimney Safety Institute of America - nationally recognized inspection and repair certification.

CSIA - Chimneyz

GAF Certified Contractor

Factory-certified roofing installer with access to enhanced warranty coverage and proven materials.

BBB Accredited

Better Business Bureau accreditation with a commitment to ethical practices and customer satisfaction.

NCSG Member

National Chimney Sweep Guild member - ongoing education, peer review, and industry best practices.

READY TO SOLVE THE FULL PROBLEM?

Get a Clear Inspection and the Right Repair Plan.

From chimney leaks and failing masonry to roofline issues and interior damage, Chimneyz helps homeowners identify the real source of the problem and fix it with one coordinated solution.

Chimneyz Worker

FAQ

Flashing is the most common point of failure on a roof. Here are the answers to help you understand your repair options.

Flashing is the metal system that creates a watertight seal between the vertical chimney structure and the sloped roofline. It consists of multiple layers, including step flashing and counter flashing, that must work together.
Flashing is the metal system that creates a watertight seal between the vertical chimney structure and the sloped roofline. It consists of multiple layers, including step flashing and counter flashing, that must work together.
Most failures happen because a contractor used roofing cement or caulk instead of properly embedding the metal into the masonry. Without a structural seal, the metal eventually pulls away as the home settles.
If your chimney is more than 30 inches wide, a cricket (a small peaked roof structure) is often required by code to divert water. Without it, water “ponds” behind the chimney, leading to inevitable leaks.
Yes. Even a small, slow leak behind the flashing can rot the plywood roof deck and create a damp environment where mold thrives long before you see a stain on your ceiling.
Most flashing repairs can be completed in a single day, but the protection lasts for decades. We serve Greater Seattle, Tacoma, Bellevue, and Everett with urgent repair teams.
CALL NOW