Waterproofing & Flashing in Redmond, 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 Redmond and King County.
Before
AfterWall under a balcony opened, flashed and rebuilt
What we see with waterproofing and flashing in Redmond
Redmond homes leak where homes on wooded hills like Education Hill stay shaded, and many 70s–90s houses were built before modern window and deck flashing details. With 1970s–90s two-story homes and newer townhomes, the most common failures are missing kick-out flashing, caulk-only wall penetrations and windows with no sill pan.
We often pair rot repair in Redmond with re-flashing windows and decks so the fix lasts. We regularly work in Education Hill, Grass Lawn, Overlake, Idylwood, Bear Creek and Sammamish Valley.
Redmond spreads from the Sammamish River valley up onto Education Hill and Grass Lawn, with many homes on wooded hillsides. 1970s–90s two-story homes on Education Hill and in Grass Lawn, and newer townhomes near downtown and Overlake.
Signs you need waterproofing and flashing in Redmond
- 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 Redmond
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 Redmond: what you should know
Flashing is what turns water away at every joint and opening in an exterior wall. In Redmond, 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 Redmond
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 Redmond
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 Redmond 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 Redmond: common questions
Can flashing be added without re-siding the whole house in Redmond?
Is caulk enough to stop a leak?
Which Redmond neighborhoods do you serve?
Is the estimate free in Redmond?
Other repairs we do in Redmond
Waterproofing & Flashing near Redmond
Need waterproofing & flashing in Redmond? Tell us about it.
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Get a free waterproofing and flashing estimate in Redmond
We'll inspect the damage on-site, show you what caused it, and give you a clear written scope and price.