Deck Waterproofing & Flashing in Mukilteo, WA
Waterproofing and flashing repair for decks, balconies, windows and roof-to-wall joints. When coatings wear through or flashing is missing at doors and walls, the leak often shows up far from where water gets in. We trace it to the source, replace any wet framing, correct slope and flashing, and finish with a walkable surface that drains away from the house. We serve homeowners across Mukilteo and nearby Everett and Edmonds.
Before
AfterFlashed and rebuilt
Why waterproofing comes up so often in Mukilteo
Rain on the Mukilteo waterfront rarely falls straight down, so any flashing gap on a windward wall will be found. Harbour Pointe homes often lack kick-outs where a roof dies into a wall, bare ledgers on second-story decks, and walk-on decks over garages or bedrooms coated with paint-on products that cracked years ago. Our work includes adding kick-outs and metal ledger caps, building sill pans at doors opening onto decks, and installing a true waterproof membrane with flashed edges and drains over living space. On salt-exposed homes we select flashing metals and fasteners rated for life near the water.
Mukilteo’s housing falls into two fairly distinct groups. Old Town, around the lighthouse and ferry landing, mixes older cottages, mid-century houses and newer view homes stacked on the bluff above Possession Sound. Harbour Pointe, on the plateau to the south, was largely built out in the late 1980s and 1990s as a planned community of two-story homes with vaulted entries, three-car garages and a lot of hardboard or early fiber cement siding. Decks there are mostly pressure-treated, many attached at the second floor. In between, homes along the gulches and wooded slopes include 1960s and 70s split-levels with daylight basements and cedar siding.
Few towns around here take as much open-water exposure as Mukilteo. The bluff looks across Possession Sound toward Whidbey Island, and winter southerlies and northwesterly blows both arrive with nothing to slow them down. Rain hits siding sideways, salt air corrodes fasteners and flashing, and decks on the water side rarely dry out between storms. Up on the Harbour Pointe plateau, the issue is less salt and more wind and long wet stretches, while the wooded gulches stay shaded and mossy. Each setting wears down paint, sealant and wood in its own way.
Our crew comes out from our Woodinville office, and we also work in nearby Everett, Edmonds, Lynnwood and Mill Creek.
When to call about waterproofing in Mukilteo
- Streaks down the wall below a roof edge
- Stains or drips on the ceiling below a deck or balcony
- Cracked, peeling or soft deck coating
- Water pooling against the house after rain
- A deck that slopes toward the house
Our waterproofing process, step by step
Trace the leak
Moisture readings, inspection openings and photos to find the real source.
Repair the substrate
Rotted plywood, joists or sheathing are replaced before sealing.
Correct slope and details
Proper slope, sill pans and flashing at every edge and door.
Apply the system
Primer, membrane and walkable top coat applied in layers.
Water test
We test the problem areas and show you the finished details.
Recent waterproofing projects near Mukilteo
What we do in Mukilteo
Leak investigation
We trace leaks to the source before anything is sealed.
Door and sill pans
Pan flashing under doors, where many balcony leaks start.
Slope correction
Fix flat or back-sloped decks so water drains away from the wall.
Window head flashing
Flashing and tape around windows to stop leaks into the wall.
Kick-out flashing
Diverts roof water away from the wall at roof-to-wall joints.
Walkable deck coatings
Waterproof coating systems for decks and balconies over living space.
Neighborhoods and permits in Mukilteo
Old Town homes on the bluff deal with salt, wind and steep lots, so view-side decks, windows and railings give out first. Harbour Pointe’s 1990s houses show their age in swollen hardboard, tired window flashing and second-story deck ledgers. Lots bordering Japanese Gulch and Big Gulch sit beneath tall trees that keep roofs, fascia and back walls damp. Toward Picnic Point and the city’s southern edge, sloped wooded lots send runoff toward the uphill side of the house.
Replacing a few rotted boards or a short run of trim in kind is often permit-free. New decks, structural repairs and larger siding projects typically require one, and homes near the bluff or on steep slopes may get added review. We check with the City of Mukilteo first, so the work is properly covered from day one.
Deck and balcony surface options
| System | Best for | Expected life | Maintenance |
|---|---|---|---|
| Recoat existing membrane | Sound surface with a worn top coat | A few years per top coat | Keep drains clear, recoat when worn |
| New walkable membrane | Decks and balconies over living space | 10–15+ years | Top coat every few years |
| Membrane under decking | Dry space under a deck with a wood or composite surface | 15+ years | Keep gaps and drains clear |
| Rebuild, slope and membrane | Wet or rotted plywood, flat or back-sloped deck | 15+ years | Top coat every few years |
What waterproofing typically costs in Mukilteo
| Project | Typical scope | Price range | Timeline |
|---|---|---|---|
| Flashing repair | Kick-out, head flashing or a door pan at one spot | $600 – $2,500 | 1 day |
| Recoat a balcony | Prep and top coat over a sound membrane | $1,500 – $4,500 | 2–3 days |
| New walkable membrane | Full membrane system on a deck or balcony | $5,000 – $14,000 | 4–7 days |
| Rebuild and waterproof | New plywood, slope correction, flashing and membrane | $12,000 – $30,000+ | 1–3 weeks |
These are typical 2026 ranges we see for waterproofing in Mukilteo and nearby cities. Your price depends on what we find once the area is open, access and height, and the materials you choose. Every estimate is free, in writing and based on an on-site inspection with photos.
Waterproofing in Mukilteo: cost and timing
Most common causes
Decks that slope toward the house
Flat or back-sloped surfaces push water against the wall and door thresholds.
Worn deck coatings
Coatings wear through first at doors, edges and posts, and water reaches the plywood underneath.
Missing kick-out flashing
Roof water runs down the wall instead of into the gutter and soaks the siding and framing.
What drives the price in Mukilteo
Waterproofing in Mukilteo depends on the size of the deck or balcony, how much substrate has to be replaced, slope correction and how many doors and walls need new flashing. Recoating a sound surface costs far less than rebuilding a wet one. You get a written price after we trace the leak.
Typical timeline
A recoat over a sound deck usually takes a few days including cure time. Rebuilding plywood, slope and flashing takes about one to two weeks, depending on weather.
Backed by a 24-month workmanship warranty
Written scope
You know exactly what is included before work starts, with photos of what we found.
Our own crew
The people who quote your job are the people who do it, start to finish.
Clean site daily
Debris is hauled away and your yard is left the way we found it.
24 months covered
If our workmanship fails within two years, we come back and make it right.
What homeowners near Mukilteo say
“Very professional, quick to respond, and able to schedule the work on short notice they treated our home and deck with care and did an excellent job. I would definitely hire them again for a future project.”
“One of my windows leaked after I had them cleaned and so I called Eco Home Repair to take a look. I really appreciated the thorough inspection - they determined the leak was unique to the aggressive window washing and wouldn't happen in regular rain (it had…”
“I had a great experience working with Eco Home Repair on a water damage project. Water was leaking into the house through the chimney, which caused mold and water damage issues. Eco Home Repair handled everything smoothly and professionally. They replaced the…”
5.0 average from 106 reviews on Google, Thumbtack, Angi, HomeAdvisor and Yelp. Read our reviews on Google.
Questions Mukilteo homeowners ask about waterproofing
Do you use different materials on Mukilteo homes near the water?
Can you coat over my existing deck in Mukilteo?
Do you fix leaks around windows?
Why is water leaking under my deck or balcony?
How often should a deck coating be recoated?
More from our crew in Mukilteo
Waterproofing near Mukilteo
Tell us about your waterproofing project in Mukilteo
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Book a free waterproofing inspection in Mukilteo
We inspect the damage on-site, show you photos of what we find and give you a written price before any work starts.