Deck Waterproofing & Flashing in Arlington, WA
Leaks under a deck or balcony? We find where the water gets in and seal it for good. 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 Arlington and nearby Marysville and Lake Stevens.
Before
AfterFlashed and rebuilt
Why waterproofing comes up so often in Arlington
Wind across the Stillaguamish valley pushes rain into every joint on an Arlington home, so flashing quality matters more here than in sheltered neighborhoods. We regularly find missing kick-outs, windows with no sill pans, ledgers bolted on without flashing, and covered decks with no membrane at all. We install kick-out and ledger flashing, sill pans under windows and doors, and waterproof membranes on decks and balconies above living space. Every lap is set so water runs out and down, even when the rain is coming in sideways off the fields.
Arlington blends small-town and rural housing. The historic downtown along Olympic Avenue is ringed by older homes, some from the early 1900s, with wood lap siding, front porches and original trim. Around Smokey Point and Gleneagle, most houses are 1990s–2010s subdivisions with fiber cement, engineered wood or vinyl siding and pressure-treated decks. Beyond the city edges, homes sit on larger lots with detached shops, barns and long decks wrapping the house. Older ramblers and manufactured homes on acreage are common as well, many clad in T1-11 panels and expanded with additions built over the years.
Arlington sits where the North and South Forks of the Stillaguamish come together, and the valley floor around it is wide, open farmland. Storms sweep across with little to stop them, so walls, decks and outbuildings on open lots take hard, wind-driven rain. Winter fog settles into the river bottoms and keeps wood damp for long stretches. Being farther inland, Arlington can also see colder snaps than towns right on the Sound, and freeze-thaw cycles open caulk joints and crack paint, letting water work deeper.
Our crew comes out from our Woodinville office, and we also work in nearby Marysville, Lake Stevens, Stanwood and Mount Vernon.
When to call about waterproofing in Arlington
- Rot or stains under windows and doors
- Streaks down the wall below a roof edge
- Cracked, peeling or soft deck coating
- A deck that slopes toward the house
- Water pooling against the house after rain
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 Arlington
What we do in Arlington
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.
Door and sill pans
Pan flashing under doors, where many balcony leaks start.
Neighborhoods and permits in Arlington
Smokey Point and the plats around it are mostly 2000s construction, so flashing and siding defects lead the list. Gleneagle’s homes near the golf course sit on wooded ground where shade and tree debris keep roofs and decks damp. Older homes near Olympic Avenue downtown need careful trim and porch work. Rural properties on the valley floor toward the river face the most wind and ground moisture, and their outbuildings often need as much attention as the house.
Inside city limits, permits come through the City of Arlington. Small like-for-like fixes, like replacing rotted trim or a section of siding, often don’t need one, but structural repairs, new decks and larger replacements usually do. Many rural homes nearby are in unincorporated Snohomish County instead, so we confirm the right office and its requirements before work begins.
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 Arlington
| 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 Arlington 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 Arlington: cost and timing
Most common causes
Missing kick-out flashing
Roof water runs down the wall instead of into the gutter and soaks the siding and framing.
Decks that slope toward the house
Flat or back-sloped surfaces push water against the wall and door thresholds.
Doors without sill pans
Water that gets under a threshold runs into the subfloor and the room below.
What drives the price in Arlington
Waterproofing in Arlington 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 Arlington 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…”
“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.”
“I hired Eco Home Repair to do a leak repair under my balcony, deck waterproofing and slope correction, and underlying rot repair. They were professional, quick, and fairly priced; kept me in the loop throughout the whole process and was honest about what…”
5.0 average from 106 reviews on Google, Thumbtack, Angi, HomeAdvisor and Yelp. Read our reviews on Google.
Questions Arlington homeowners ask about waterproofing
Can you repair siding on my shop or barn near Arlington?
Can you coat over my existing deck in Arlington?
What is kick-out flashing?
How long does a deck coating last?
Why does my ceiling leak only in heavy rain?
More from our crew in Arlington
Waterproofing near Arlington
Tell us about your waterproofing project in Arlington
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Book a free waterproofing inspection in Arlington
We inspect the damage on-site, show you photos of what we find and give you a written price before any work starts.