Roof Leak Repair
Find the source, not just the stain. Leak repair for Seattle homes and businesses, quoted in writing before work starts.
Roof Leak Repair in Seattle From a Licensed Roofing Contractor
Water rarely drips straight down from the spot where it gets into a roof. It slips under a shingle or behind a piece of flashing, runs along the underlayment or down a rafter, and finally shows up as a ceiling stain that can sit well away from the real opening. That is why patching the shingles directly above a stain so often fails, and why a leak that has been fixed twice can still be dripping.
We work the problem from both sides. In the attic we follow the water trail, the darkened sheathing and the damp insulation uphill toward where it started. On the roof we check every flashing seam, boot, valley and fastener in that area, and when the entry point still is not obvious we run a controlled water test, wetting one section at a time while someone watches inside. Once we can show you where the water gets in, we write up the repair and the price before any work begins.
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Workmanship warranty on every install, plus manufacturer material warranties up to 30 years.
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What's included with our roof leak repair service
- ✓ Attic and on-roof leak diagnosis
- ✓ Flashing and counter-flashing reseal
- ✓ Pipe boot and vent reseal
- ✓ Valley repair
- ✓ Isolated shingle replacement
- ✓ Decking replacement where water has rotted it
Get a Free Roof Leak Repair Estimate
Most estimates scheduled within 48 hours. No obligation, no high-pressure sales, written line-item quote.
Request Free Estimate Call (206) 659-4349172+ verified Google reviews from Seattle, Bellevue, Kirkland, and Greater Seattle homeowners.
Where Seattle Roofs Leak
Leaks cluster at the places where the roof changes direction or something passes through it. These are the spots we check first on almost every leak call.
Flashing at Walls and Chimneys
Step flashing and counter-flashing seal the joint where a roof meets a sidewall, a dormer or a chimney. When the sealant dries out or a strip of counter-flashing pulls loose, rain running down the wall slips in behind it. These leaks tend to appear on the ceiling or upper wall right beside the chimney or dormer.
Skylights
A leaking skylight is usually a flashing or curb seal problem rather than a broken pane. Water that gets past the flashing runs down the inside of the light well, so the stain appears on the drywall around the opening. Our skylight repair page covers reseals, new flashing kits and full replacements.
Pipe Boots and Vents
Plumbing vents, bath fans and kitchen exhaust vents pass through the roof inside a rubber or metal boot. The rubber collar on a standard pipe boot cracks and shrinks as it ages in the sun, and once it splits, water follows the pipe straight down into the attic. A failed boot is one of the most frequent leak sources and one of the simplest to put right.
Valleys
A valley carries the runoff from two roof planes at once, so it handles more water than any other part of the roof. Needles, leaves and moss collect there and hold water against the shingles, and a nail set too close to the center line gives that water a way in. Valley leaks often show up at the inside corners of rooms.
Nail Pops and Lifted Shingles
As roof decking swells and shrinks through wet and dry months, nails can back out and push up through the shingle above them. Wind can also break a shingle's seal strip and lift its edge. Either way, water gets a direct path to a fastener hole. These leaks are small and slow, and they are easy to miss until the wood around the nail starts to darken.
Flat Roof Seams and Drains
Low-slope sections over porches, additions and garages depend on sealed membrane seams and drains that stay clear. An open seam or a drain blocked with debris lets water sit until it finds a way through. These roofs fail differently from pitched ones, and we repair TPO, PVC, EPDM and modified bitumen membranes.
How We Find and Fix a Roof Leak
A leak repair only works if it closes the opening the water actually uses. Every job follows the same five steps so nothing gets skipped.
- 1
Call
Call or send the form and tell us where the water shows up and when: in every rain, only in heavy rain, or only when the wind blows a certain way.
- 2
Inspection and Water Test
We look at the stain, go up into the attic, then walk the roof above it. If the source is hidden, we water-test sections of the roof until the leak shows itself.
- 3
Written Quote
You get a quote in writing that names the source, the repair and the price, along with photos of what we found.
- 4
Repair
The crew replaces the failed flashing, boot, valley section or shingles, plus any wet decking underneath, using materials matched to your roof.
- 5
Watertight Check
Before we pack up, we check the finished repair and the area around it so the water path is closed, not just covered.
If water is coming in right now, move what you can out of the way, set a bucket under the drip and give us a call at (206) 659-4349. Active leaks are prioritized during business hours, Monday through Friday, 7:00 AM to 4:00 PM.
Repair the Leak or Replace the Roof?
Most leaks come from one failed part on a roof that still has years left in it.
Repair it
- ✓ The shingles around the leak lie flat
- ✓ They stay bonded
- ✓ They hold their granules
A targeted repair is the right call, and it is what we will recommend.
Time to replace
- ✓ Leaks keep turning up in different places
- ✓ Brittle shingles that crack when we lift them
- ✓ Heavy granule loss
- ✓ Soft decking in more than one area
- ✓ A roof that has already been patched several times
These all point to a roof near the end of its life. At that stage each repair buys less time, and the money usually does more toward a new roof.
We will tell you which situation you are in and show you why. If replacement makes sense, our roof installation page explains how a new roof goes on, and the roofing cost calculator gives you a price range before anyone visits.
Roof Leaks in Seattle's Climate
Steady, Soaking Rain
Seattle rain is persistent more than it is violent. Weeks of drizzle and long soaking rains keep roofs wet for long stretches, so a small opening that would dry out between showers somewhere else stays damp here, and the water keeps working into the underlayment and decking.
Wind-Driven Rain
Fall and winter wind pushes rain sideways against walls and chimneys and up under shingle edges. Plenty of homeowners notice their leak only appears when the wind comes from one direction, which is a strong clue about where the entry point sits.
Freeze-Thaw Cycles
On colder nights, water that has seeped into cracked sealant or a gap in the flashing freezes, expands and widens the opening a little more. After a few winters of that, a hairline gap becomes a real leak.
Moss on Shaded Roofs
Moss plays a part as well. On shaded roofs it grows into the gaps between shingles, lifts their edges and keeps the surface wet long after the rain stops. When moss has pushed shingles up far enough to let water through, we replace the damaged shingles and any wet decking beneath them.
Recent Work
Recent Roof Repair Projects
My job was very challenging. Actively leaking torchdown flat roof in winter over the holidays during an atmospheric rive...
The best, most caring and professional company we have ever experienced. Not only was the new roof done quickly and perf...
Really enjoyed working with K Single Corp Roofing! They came to check out a leak in my roof and offered several options...
I'm a business owner in Seattle, WA and we have a flat roof that needed multiple repairs. I really enjoyed working with...
Isidro promptly conducted the roof repair assessment, delivering an estimate immediately. The crew arrived just one week...
Isidro and his crew are fantastic. Isidro is prompt to investigate an issue when asked, thorough in his explanation on t...
The K Single Team was awesome. They provided prompt and fair pricing for my repair, accommodated a few changes on the fl...
Just a note to tell you how impressed we are with your crew and the excellent work they did repairing our roof yesterday...
Jose M and team were thorough at repairing the roof and replacing my gutters. The work looks clean and appears to be fun...
They did my metal roof a few years ago. Great job! When trees came down in that big wind, some roof damage. They were ri...
Contacted K Single due to leaking roof. Water coming in to the house. They were at the house within a day of calling, in...
K Single has completed two roof repairs for me; one on my house and one on a commercial building I own. Both jobs were d...
Common Questions
Frequently Asked Questions
How much does roof leak repair cost in Seattle?
Can you find a leak if it only shows up in heavy rain?
Can you repair a roof leak without replacing the roof?
How fast can you look at an active leak?
Will the repair match my existing roof?
Is roof leak repair covered by a warranty?
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Request a free estimate and find out why 15,000+ homeowners trust K Single Corp.
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