Deck Waterproofing & Flashing in Brier, 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 Brier and nearby Mountlake Terrace and Lynnwood.
Before
AfterNew siding and trim around the window
Why waterproofing comes up so often in Brier
Under constant shade, even a small flashing gap can cause steady leaks on a Brier home. We often find decks attached directly to the house with no ledger flashing, roof-to-wall intersections without kick-outs, and older windows installed with nothing more than caulk. Debris from the trees clogs drainage paths and makes everything worse. We install proper ledger and kick-out flashing, add sill pans and flashing tape at windows and doors, and use membranes on decks or walkways over enclosed space. We also make sure water can actually drain off the surface instead of pooling under leaves.
Brier is a small residential city with no real commercial core, and its housing reflects that. Most homes were built between the 1960s and the 1990s on larger lots than the surrounding suburbs, many with tall Douglas fir, cedar and big-leaf maple left standing. You will find daylight ramblers, split-levels, contemporary-style homes with vertical cedar or T1-11 siding, and later two-story houses with lap siding. Long gravel or paved driveways, detached shops and outbuildings are common, and a few properties still keep horses. Decks are often large, built by owners over the years, and wrap partway around the house.
Tree cover is the story in Brier. Dense canopy keeps roofs, decks and siding in shade most of the year, so moss, algae and needle buildup are constant. Rain that falls on a shaded deck may sit there for days, and siding near the ground stays dark and wet through winter. Wind storms bring down limbs that crack gutters and fascia. The ravines on the edges of the city also hold cold, damp air on still mornings, which slows drying on lower walls and on outbuildings tucked into the trees.
Our crew comes out from our Woodinville office, and we also work in nearby Mountlake Terrace, Lynnwood, Bothell and Lake Forest Park.
When to call about waterproofing in Brier
- A deck that slopes toward the house
- 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
- Streaks down the wall below a roof edge
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 Brier
What we do in Brier
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.
Window head flashing
Flashing and tape around windows to stop leaks into the wall.
Slope correction
Fix flat or back-sloped decks so water drains away from the wall.
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.
Neighborhoods and permits in Brier
Properties near Brier Park and along the central streets off Brier Road tend to be flat, with mature trees but some open sun. Lots on the eastern side that slope toward Swamp Creek sit lower and wetter, and their downhill decks are often tall. Homes near the Mountlake Terrace and Lynnwood edges are more suburban in size and style. Wherever lots back onto a ravine, we see more moisture at the foundation line and in crawlspaces.
Brier is a small city, and minor like-for-like repairs often don’t require a permit, while structural repairs, new decks and larger re-siding projects usually do. Our team contacts the City of Brier before work starts. Large lots and steep slopes near ravines can raise extra questions about critical areas, so we confirm what applies to your property early in the process.
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 Brier
| 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 Brier 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 Brier: 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.
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.
What drives the price in Brier
Waterproofing in Brier 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 Brier 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.”
“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…”
“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 Brier homeowners ask about waterproofing
Can you repair a shop or outbuilding on my Brier property too?
Can you coat over my existing deck in Brier?
Why is water leaking under my deck or balcony?
Do you fix leaks around windows?
Can you waterproof a deck over a living space?
More from our crew in Brier
Waterproofing near Brier
Tell us about your waterproofing project in Brier
- Licensed, bonded & insured
- Free on-site estimates
- 24-month workmanship warranty
Book a free waterproofing inspection in Brier
We inspect the damage on-site, show you photos of what we find and give you a written price before any work starts.