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Chimney Chase Cover Replacement in Sammamish, WA
The original flat chase cover on a Sammamish plateau home is usually the first chimney part to fail. Replacement starting at $299.
- Serving Sammamish & King County
- Free 2nd-opinion quotes
- Price match + 10–25% discount
Free Chimney Chase Cover Replacement Quote in Sammamish
We'll confirm a time by phone or text.
If there is one chimney job we do more than any other in Sammamish, it is replacing chase covers. The plateau’s subdivisions were typically built with factory-built fireplaces inside wood-framed chases, and the covers that went on those chases were commonly flat galvanized steel. A flat cover pools water. Galvanized steel rusts where water sits. The result, years later, is a hole in the middle of the cover and water running down inside the chase, with rust streaks on the siding as the first visible warning. Sometimes the first sign is a stain on the ceiling near the fireplace instead.
We replace the cover with a stainless or heavy-gauge cover that is cross-broken so it drains to all four edges, with a proper drip edge and a new storm collar sealed around the pipe. While the old cover is off we check the pipe joints and the top of the chase framing, and we tell you what we find before any extra work is added. Chase cover replacement starts at $299. The quote is free, we price match plus 10-25% off any written quote, and because Sammamish is close to Renton, same-day service is often available for the measuring visit. If you are not happy, we are not done.
Symptoms
Signs Sammamish homeowners notice
- Rust-colored streaks down the siding below the top of the chimney
- Standing water or rust pooling on top of the chimney after rain
- Water dripping onto the fireplace or staining the ceiling beside it
- Soft, swollen, or peeling siding and trim near the top of the chase
- A cover that rattles or lifts at the edges in wind
- Visible rust holes or a sagging center in the metal lid
Sammamish Conditions
Why this happens in Sammamish
A chase cover on the plateau has the worst job on the house: a flat piece of steel facing straight up into 40.34 inches of rain a year and roughly 150-156 days with measurable precipitation. About 73% of that rain falls between October and March, so the cover typically sits under standing water for months at a stretch. On Sammamish’s wooded lots, fir needles collect on the cover and moss follows; regional guidance identifies tree-shaded, slow-drying surfaces as where moss spreads fastest from October through April, and moss holds the water against the metal between storms.
Sammamish homes are typically newer suburban construction, which means most chases still wear their original builder cover, and those covers are now decades into a climate they were never well suited to. Rust typically starts at the center where the water is deepest and at the collar where the pipe passes through, and both spots lead straight into the framing.
How It Works
Our chimney chase cover replacement process
Measure the chase
We measure the chase, the flue pipe diameter and position, and the skirt height so the new cover fits without gaps.
Fabricate the cover
The replacement is made from stainless steel or aluminum with a cross-break, raised collar, and a drip-edge skirt over the siding.
Remove the old cover
The rusted lid comes off and we inspect and dry out the top plate. Minor wood damage is addressed before the new cover goes on.
Set and fasten
The new cover is fastened through the skirt into the sides of the chase, never through the top, and the collar is sealed to the flue pipe with high-temperature sealant.
Cap and check
We reinstall or replace the flue cap, confirm the storm collar is sealed, and photograph the finished top for you.
Full details, options and pricing factors on the main Chimney Chase Cover Replacement page.
Need chimney chase cover replacement in Sammamish?
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Chimney Chase Cover Replacement in Sammamish — FAQ
What size chase cover does my Sammamish home need?
Every chase is a little different, so we measure on the first visit rather than guessing. Covers are fabricated to the chase dimensions with the pipe opening in the right spot and a collar sized to the pipe. That is why the job is two short visits: measure and inspect, then install. Both are quick from Renton, and the quote is free.
Should I replace the chase cover before the fall rains?
If the cover is rusting, yes. November is the wettest month in the regional normals, and a cover that drips in August floods in November. Summer, with only about 3 inches of rain across June through August, is the easiest time to swap it and check the framing while everything is dry. Replacement starts at $299.
How soon can you do chimney chase cover replacement in Sammamish?
We confirm a time by phone or text after you request a quote; same-day service is often available for urgent problems in Sammamish and the rest of King County.
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