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Chimney Leak Repair in Sammamish, WA
Water stains near a Sammamish fireplace almost always trace to the chase cover or flashing. We find it and fix it.
- Serving Sammamish & King County
- Free 2nd-opinion quotes
- Price match + 10–25% discount
Free Chimney Leak Repair Quote in Sammamish
We'll confirm a time by phone or text.
On the Sammamish plateau, a chimney leak is usually a chase leak. The fireplace is a factory-built unit, the chimney is a siding-clad wood chase, and the lid is a sheet-metal cover that was often installed flat when the subdivision went in. Water pools on the flat cover, rust opens a hole, and the leak runs down inside the chase where it soaks the framing and sheathing long before it reaches a ceiling or the fireplace surround. The other common source is the flashing where the chase meets the roof, especially on the uphill side where debris and moss collect.
We start by finding the actual entry point, water-testing if needed, because sealing the wrong spot only moves the stain. The fix is then quoted plainly: a new cross-broken cover (starting at $299), a new storm collar, reflashing, or, where the water has been coming in for years, a chase rebuild (starting at $299). For the brick chimneys near Pine Lake and Beaver Lake, a crown rebuild starts at $299. The quote is free, we price match plus 10-25% off any written quote, and same-day service is often available since Sammamish is a short drive from Renton. If you are not happy, we are not done.
Symptoms
Signs Sammamish homeowners notice
- Water pooling in the firebox or dripping from the damper after rain
- Brown stain on the ceiling or wall beside the chimney that grows during the wet season
- White crusty efflorescence on the brick inside or outside
- Rust streaks down the siding of a framed chimney or down the face of the brick
- Spalling brick faces or crumbling mortar near the top of the chimney
- Damp firebox walls even when it has not rained for a day or two
Sammamish Conditions
Why this happens in Sammamish
The plateau takes the full regional wet season: about 29.65 inches of rain from October through March, with November averaging 6.31 inches and the November-to-January stretch carrying roughly 44% of the year’s rain. That is when Sammamish leak calls peak, because water that has been slipping past a rusted cover all fall finally saturates the chase framing and shows up on drywall. On the wooded lots common here, moss on the cover and in the roof valley beside the chase holds that water in place; regional guidance identifies shaded, slow-drying surfaces as where moss spreads fastest between October and April.
Sammamish homes typically have prefab chimneys, so most leaks come down to the cover or collar. On the older brick chimneys by the lakes, the Brick Industry Association notes that improperly filled mortar joints leak and that water penetration followed by freeze-thaw widens the cracks, and with Sea-Tac winter lows averaging just above freezing, that cycling typically repeats many times a winter.
How It Works
Our chimney leak repair process
Map the symptom
We ask where the water shows up, when, and how long after rain, because each entry point leaves a different signature.
Check the top
Crown, cap and chase cover are inspected first, since they are the most common leak sources and the fastest to rule in or out.
Check the roofline and masonry
Flashing, mortar joints, spalled brick and the flue itself are checked, including for condensation that mimics a leak.
Fix in the right order
We repair the entry points that are actually leaking, from the top down, and leave the sound ones alone.
Water-test and follow up
Where possible we run water on the repair to confirm it is dry, and if the next storm proves us wrong, we come back at no charge.
Full details, options and pricing factors on the main Chimney Leak Repair page.
Need chimney leak repair in Sammamish?
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Chimney Leak Repair in Sammamish — FAQ
There is a water stain on the ceiling next to my Sammamish fireplace. Is it the chimney?
Usually, yes, if the stain is within a few feet of the fireplace wall. On a prefab chimney the water enters at the chase cover or collar and runs down inside the chase, so the stain appears where the chase meets the ceiling. We inspect the cover, collar, flashing, and chase interior during a free diagnosis visit before quoting.
Can you stop the leak quickly if it is raining now?
Often the same day. Sammamish is close to Renton, and we carry cover stock, collars, sealant, and flashing on the truck. If the permanent fix needs a custom-fabricated cover, we seal the entry point temporarily on the first visit and return with the finished cover. The price is matched plus 10-25% off any written quote.
How soon can you do chimney leak repair 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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