Deck Waterproofing & Flashing in Edmonds, WA
Walkable waterproof coatings, slope fixes and flashing that keep water out of your walls and ceilings. 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 Edmonds and nearby Lynnwood and Mountlake Terrace.
Before
AfterFlashed and rebuilt
Why waterproofing comes up so often in Edmonds
Waterproofing matters on Edmonds homes because so many have decks and balconies built over living space to make the most of the view. When the membrane on one of those decks cracks or the door threshold was never flashed, water reaches the ceiling below and the framing in between. Hillside homes with stepped rooflines are also prone to missing kick-outs, and plenty of ledgers lack a metal cap. We install walkable membranes with flashed perimeters and drains, build pans under doors, add kick-out and ledger flashing, and overlap each layer shingle-style so runoff never gets a path inside.
Edmonds began as a waterfront mill town, and that history still shows in the Bowl, where small early-1900s cottages and bungalows sit among mid-century homes and newer infill. The hillsides rising from downtown through Seaview and Westgate filled in from the 1950s through the 70s with view-oriented ramblers, split-levels and daylight-basement houses, often sided in cedar or plywood and fronted by broad west-facing decks. Perrinville, Firdale and the streets around Five Corners added more ramblers and two-story homes, some with T1-11 or hardboard. Many Edmonds houses have been remodeled more than once, so original cedar beside newer fiber cement is a common sight.
Edmonds faces Puget Sound and the Olympics head-on, and most of the city slopes down toward the water. West walls, decks and windows on view homes absorb the full force of winter storms traveling up the Sound, along with salt carried in the spray. Higher neighborhoods to the east are less exposed but still endure months of rain and slow drying. Ravines along Perrinville Creek and Shell Creek hold shade and moisture year-round. Over time this mix opens caulk joints, lifts paint and lets water soak into the end grain of trim and deck boards.
Our crew comes out from our Woodinville office, and we also work in nearby Lynnwood, Mountlake Terrace, Shoreline and Mukilteo.
When to call about waterproofing in Edmonds
- Streaks down the wall below a roof edge
- Rot or stains under windows and doors
- Water pooling against the house after rain
- Stains or drips on the ceiling below a deck or balcony
- Cracked, peeling or soft deck coating
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 Edmonds
What we do in Edmonds
Door and sill pans
Pan flashing under doors, where many balcony leaks start.
Leak investigation
We trace leaks to the source before anything is sealed.
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.
Walkable deck coatings
Waterproof coating systems for decks and balconies over living space.
Kick-out flashing
Diverts roof water away from the wall at roof-to-wall joints.
Neighborhoods and permits in Edmonds
In the Bowl, older homes near downtown have original wood, tight lots and porches that have weathered many decades of rain. Seaview and the hillside streets overlooking the ferry dock get the strongest wind and salt on their view sides. Perrinville and other neighborhoods along wooded creek ravines stay shaded and damp, letting moss and rot settle into roofs and lower walls. Five Corners and Westgate hold many 1960s and 70s homes now reaching the age when decks, trim and flashing all need attention.
Minor fixes such as replacing a few decayed boards or trim pieces with the same material often can proceed without a permit. Deck construction, structural repairs and bigger replacements usually need one, and the city may look more closely at work on steep slopes or near the shoreline. We verify the rules with the City of Edmonds and take care of the permit if one applies.
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 Edmonds
| 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 Edmonds 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 Edmonds: cost and timing
Most common causes
Worn deck coatings
Coatings wear through first at doors, edges and posts, and water reaches the plywood underneath.
Doors without sill pans
Water that gets under a threshold runs into the subfloor and the room below.
Decks that slope toward the house
Flat or back-sloped surfaces push water against the wall and door thresholds.
What drives the price in Edmonds
Waterproofing in Edmonds 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 Edmonds say
“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…”
“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.”
5.0 average from 106 reviews on Google, Thumbtack, Angi, HomeAdvisor and Yelp. Read our reviews on Google.
Questions Edmonds homeowners ask about waterproofing
Can you match the original siding on an older home in the Bowl in Edmonds?
Can you coat over my existing deck in Edmonds?
Why is water leaking under my deck or balcony?
Do you fix leaks around windows?
Why does my ceiling leak only in heavy rain?
More from our crew in Edmonds
Waterproofing near Edmonds
Tell us about your waterproofing project in Edmonds
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Book a free waterproofing inspection in Edmonds
We inspect the damage on-site, show you photos of what we find and give you a written price before any work starts.