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Chimney Leak Repair in Mercer Island, WA
Finding and fixing the water coming in around Mercer Island chimneys, from wind-driven lake rain to rusted chase covers. Free quote.
- Serving Mercer Island & King County
- Free 2nd-opinion quotes
- Price match + 10–25% discount
Free Chimney Leak Repair Quote in Mercer Island
We'll confirm a time by phone or text.
A leaking chimney on Mercer Island usually shows up first as a brown ring on the ceiling next to the fireplace wall, or as damp drywall in an upstairs bedroom that shares a wall with the chimney. On the island's mid-century ramblers and split-levels the water most often gets in through a cracked crown or through step flashing that has pulled away from old brick on the lake-facing side. On the newer lakefront rebuilds it is more often a rusted-through chase cover or a cap that was never sealed around the pipe.
We start with a free quote that includes finding the actual entry point, because a chimney leak gets misdiagnosed as a roof leak often enough that homeowners pay for the wrong fix. Then we seal or rebuild the crown (starting at $299), replace the chase cover (starting at $299), reset the flashing or apply a masonry water repellent, depending on what we find. We are about 20 minutes from Mercer Island via I-90, same-day service is often available, and if you already have a bid we will price match and take 10 to 25 percent off.
Symptoms
Signs Mercer Island 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
Mercer Island Conditions
Why this happens in Mercer Island
Mercer Island chimneys catch rain from two directions at once. Storms come in off Lake Washington and hit west-shore homes facing Seward Park with wind behind them, so rain is driven sideways into the joint between brick and flashing rather than falling straight onto the crown. November alone averages 6.31 inches here, the wettest month, and the October-to-March season carries about 29.65 of the year's 40.34 inches. A chimney that only weeps in a November storm is still soaking the framing behind it.
Then the freeze comes. With about 60 days a year touching 32F and lows averaging just above freezing, water sitting in a crown crack or an open mortar joint freezes overnight and thaws by noon, and each pass opens the gap wider. That is why a small drip in December on an East Mercer Way chimney can be a steady leak by February, and why we recommend a free look as soon as you see a stain.
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 Mercer Island?
Call now or request a free quote — we confirm by phone or text.
☎ 206-453-2045 Request a QuoteQuestions
Chimney Leak Repair in Mercer Island — FAQ
How do you tell if water on my Mercer Island ceiling is from the chimney or the roof?
We check from the roof and the attic. A chimney leak leaves water trails on the brick or the chase framing below the flashing line, while a roof leak tracks along the sheathing. We run the camera and a hose test if needed. The diagnosis is part of the free quote, so you are not paying for a roofer's guess.
Can a Mercer Island chimney leak be fixed in winter, or do I wait for summer?
Most leak repairs can be done in winter during a dry window. Flashing, chase covers and caps go on in any weather. A full crown rebuild needs a dry day or two to cure, so in the rainy months we sometimes do a temporary seal and schedule the rebuild for a stretch of dry weather. Either way we stop the water first.
How soon can you do chimney leak repair in Mercer Island?
We confirm a time by phone or text after you request a quote; same-day service is often available for urgent problems in Mercer Island and the rest of King County.
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