Waterproofing & Flashing in Bothell, WA
We install the flashing, sill pans, kick-outs, penetration blocks and deck coatings that keep water out of the wall. We serve homeowners across Bothell and King and Snohomish counties.
Before
AfterWall under a balcony opened, flashed and rebuilt
What we see with waterproofing and flashing in Bothell
Bothell homes leak where hillside lots and tight side yards keep some walls shaded and wet, and builder-grade flashing from the 80s and 90s is reaching the end of its life. With 1980s–2000s subdivisions with fiber cement or hardboard siding and attached decks, the most common failures are missing kick-out flashing, caulk-only wall penetrations and windows with no sill pan.
Bothell sits in two counties; we cover both sides. We regularly work in Canyon Park, North Creek, Thrasher’s Corner, Maywood, Westhill and Queensborough.
Bothell straddles King and Snohomish counties along North Creek and the Sammamish River, with many homes on hillside lots. 1980s–2000s subdivisions in Canyon Park, North Creek and Thrasher’s Corner, and older homes near downtown.
Signs you need waterproofing and flashing in Bothell
- Stains below vents, lights or hose bibs
- Water marks under windows inside
- Peeling paint below roof-to-wall joints
- Leaks at balcony or deck doors
- Caulk that is cracked or pulling away
How we handle waterproofing and flashing in Bothell
Free on-site inspection: we probe the wood, check moisture and find where the water gets in.
A written scope and price with photos, before any work starts.
We remove every damaged section and rebuild framing, sheathing and barrier as needed.
Flashing, siding, trim and paint so the repair matches and the leak does not come back.
Recent waterproofing & flashing projects
Waterproofing & Flashing in Bothell: what you should know
Flashing is what turns water away at every joint and opening in an exterior wall. In Bothell, almost every rot repair we do traces back to flashing that was missing, installed backwards, or replaced with caulk. Good waterproofing is mostly about laps: each layer overlaps the one below it so water always runs out.
What causes it in Bothell
Kick-out flashing missing
Roof water pours into the wall where the roof edge meets siding.
No sill pans under windows and doors
Water that gets into the opening has nowhere to drain except into the framing.
Caulk-only penetrations
Dryer vents, pipes and lights without a flashed block leak once the caulk cracks.
Failed deck and balcony coatings
Walking surfaces over living space crack and let water into the framing below.
What our waterproofing and flashing includes
- Water testing and inspection to find the actual entry point
- Opening only the area needed around the problem
- Kick-out flashing, head flashing, sill pans and Z-flashing
- Flashed mounting blocks for vents, lights and pipes
- Flashing tape lapped shingle-style into the weather barrier
- Deck and balcony membranes or coatings where needed
- Siding and trim reinstalled and sealed
How to prevent it
- Check caulk joints every fall, but do not rely on caulk alone
- Look for stains below vents, lights and roof edges
- Keep gutters running so roof edges are not overloaded
- Ask for kick-out flashing whenever a roof is replaced
- Recoat balcony surfaces on the manufacturer's schedule
What affects the cost in Bothell
Most flashing repairs are small in area, so the cost is mostly labor to remove and reinstall siding around the detail. If rot is found behind it, framing and sheathing repair is added, which is why fixing flashing early is the cheapest exterior repair you can make.
How long it takes
Single flashing details usually take a few hours to a day. Balcony and deck waterproofing typically takes two to four days including cure time.
Why homeowners in Bothell choose Goodbye Rot
We fix the cause, not just the surface. Every waterproofing and flashing job starts with a free on-site inspection, moisture readings and photos, and you get a written scope and price before work begins. We are licensed, bonded and insured in Washington, and our repairs carry a 24-month workmanship warranty.
Waterproofing & Flashing in Bothell: common questions
Can flashing be added without re-siding the whole house in Bothell?
Is caulk enough to stop a leak?
Which Bothell neighborhoods do you serve?
Is the estimate free in Bothell?
Other repairs we do in Bothell
Waterproofing & Flashing near Bothell
Need waterproofing & flashing in Bothell? Tell us about it.
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Get a free waterproofing and flashing estimate in Bothell
We'll inspect the damage on-site, show you what caused it, and give you a clear written scope and price.