Don't let a small leak become a big problem. From missing shingles to storm damage, our CertainTeed ShingleMaster-certified crew delivers fast, permanent roof repairs across Seattle, Bellevue, Kirkland, and all of King County.
Seattle's climate is uniquely challenging for roofing systems. Between the relentless autumn rains, winter freeze-thaw cycles, moss growth fueled by constant moisture, and the occasional windstorm that rips through the Puget Sound corridor, roofs in King County take a beating that most other regions simply never experience. At Mass & Mass LLC, we have been repairing roofs across Seattle, Bellevue, Kirkland, Redmond, and the surrounding communities since 2016 — and we understand exactly how the Pacific Northwest climate damages your roof and what it takes to fix it properly.
A roof repair is not just about stopping a drip. It is about identifying the root cause of the failure, correcting it with the right materials and technique, and ensuring the repair integrates seamlessly with your existing roofing system so it lasts for years. That is the approach we bring to every single job, whether it is a $250 pipe boot replacement or a $2,000 multi-area repair.
Active leaks are the most urgent roofing issue homeowners face. Water intrusion can damage insulation, drywall, framing, and even electrical systems within days. We trace every leak back to its true source — which is often not directly above the visible stain — seal the entry point, repair any underlayment damage, and restore the shingle or flashing layer to factory-spec performance. In Seattle's climate, where 37 inches of rain fall annually, even a pinhole leak will escalate fast if left untreated.
High winds, falling branches, and foot traffic from gutter cleaners are the top causes of missing or cracked shingles in King County. We carry a wide range of CertainTeed shingle colors and profiles on our trucks so we can match your existing roof as closely as possible. Each replacement shingle is hand-sealed with roofing cement and nailed according to manufacturer wind-rating specs.
Flashing — the thin metal pieces that seal transitions around chimneys, skylights, vents, and wall-to-roof joints — is one of the most common failure points on any roof. When flashing corrodes, lifts, or separates from the sealant bed, water pours directly into your home's structure. We remove the failed flashing, inspect the decking beneath for rot, install new flashing with proper step-and-counter techniques, and seal every edge with high-quality polyurethane sealant rated for PNW conditions.
The rubber boots that seal plumbing vent pipes deteriorate faster than almost any other roof component in the Pacific Northwest. UV exposure during our long summer days and freeze-thaw cycling in winter cause the rubber to crack and split, usually within 8 to 12 years. A failed pipe boot is one of the most common — and most easily preventable — sources of roof leaks. We replace them with commercial-grade EPDM boots or, for longer-lasting protection, aluminum-based boots that can outlast the roof itself.
Ridge caps take the full force of wind exposure because they sit at the highest point of your roof. When ridge cap shingles blow off or crack, the ridge vent beneath becomes an open pathway for rain and wind-driven moisture. We install new ridge cap shingles with high-wind nailing patterns and ensure the ridge vent underneath is intact and functioning properly for attic ventilation.
Roof valleys channel an enormous volume of water during rainstorms — far more per square foot than any other area of your roof. When valley flashing or woven shingles fail, the result is often significant interior water damage. Our valley repairs include full flashing replacement, underlayment restoration, and proper ice-and-water shield membrane installation for long-term protection in Seattle's heavy rain environment.
Clogged or misaligned gutters cause water to back up under the roof edge, rotting fascia boards and soaking the roof deck. We repair the resulting roof damage and address the gutter issue that caused it, so you are not paying for the same repair twice. This is one of the most overlooked causes of roof deterioration in the Seattle area, where clogged gutters are extremely common due to heavy tree cover.
Not sure what is wrong with your roof? We offer free roof assessments throughout King County. Our technicians will inspect your roof, identify every issue, and provide a clear, honest recommendation — whether that means a minor repair, a larger fix, or a conversation about replacement if the damage is too extensive. Call (425) 435-5800 to schedule yours.
One of the most important decisions a homeowner faces is whether to repair or replace. Here is a straightforward guide:
Repair is usually the right call when:
Replacement makes more sense when:
We will always give you an honest assessment. If a $400 repair will solve the problem, we will tell you that — even if a replacement would be a larger sale for us. That integrity is why we have maintained a 4.9-star Google rating and hundreds of five-star reviews from homeowners across King County.
Roofing contractors who learned their trade in drier climates often underestimate the specific challenges of the Puget Sound environment. Here is what makes roof repair in Seattle different:
Transparency matters. Here are the typical cost ranges for the most common roof repairs in King County. Your actual price depends on roof pitch, accessibility, material match, and the extent of any hidden damage we discover during the repair.
Typical price ranges for common roof repairs in the Seattle and King County area. Every estimate is free, detailed, and guaranteed in writing.
| Repair Type | Typical Cost |
|---|---|
| Pipe Boot Replacement | $200 – $400 |
| Missing Shingle Repair (small area) | $250 – $500 |
| Flashing Repair | $400 – $900 |
| Ridge Cap Replacement | $350 – $800 |
| Valley Repair | $500 – $1,200 |
| Leak Diagnosis & Repair | $300 – $1,200 |
| Multi-Area / Extensive Repair | $1,200 – $2,000+ |
* Prices are estimates for typical residential repairs. Your actual cost may vary based on roof pitch, accessibility, and material requirements. We provide exact pricing in your free written estimate.
We inspect your roof thoroughly — from the attic to the ridge — to identify every issue, not just the obvious ones. We photograph all findings and share them with you.
You receive a clear, written estimate that itemizes every repair, the materials we will use, and the total cost. No surprises, no hidden fees, no pressure.
Once you approve the estimate, we schedule your repair quickly — most non-emergency repairs are completed within the same week. Emergency leaks get priority response.
Our ShingleMaster-certified crew performs the repair using manufacturer-spec techniques and premium materials. We work clean and respect your property at all times.
After the repair is complete, our lead technician performs a final quality check and walks you through exactly what was done. We also provide before-and-after photos for your records.
Every day you wait, water damage spreads. Get a free, no-obligation roof repair assessment from Mass & Mass — Seattle's trusted roofing experts since 2016.