Shoreline Window Pros provides professional patio and sliding glass doors in Shoreline, WA for residential and commercial properties across north King County. A sliding patio door is the largest hole in your wall, and it sits where water is most likely to collect. On a Shoreline house that means a door onto a deck off a face-sealed wall, which is the detail we spend most time on.
The failure mode is consistent. Deck boards sit close to the door sill, splash comes back off them in a wet winter, the sill track fills, and the water that should be weeping out sits against the framing instead. Nine times out of ten the rot we find under a patio door starts at the outer corners of the sill, not at the glass.
So the pan under the door is not optional and it is not a strip of tape. We form or fit a full-width pan with a sloped bed, a back dam at the interior edge, turned end dams at both jambs, and a positive path out over the water-resistive barrier. In a wall the code allows to have no drainage cavity behind lapped or panel siding, that pan is the only device catching what gets past the door.
Threshold height is the argument we have most often. Everyone wants a flush transition to the deck, and a flush transition is exactly what puts the sill in a splash zone. We will push for the code minimum step down to the deck surface, or for the deck to be re-graded and the boards spaced to drain away, before we will fit a door with its track level with the walking surface.
Hardware separates a good door from a frustrating one. Ask for tandem stainless rollers rather than single nylon wheels, a rated multipoint lock instead of a single hook latch, an adjustable strike, and an interlock at the meeting stile so the panels seal against each other rather than merely overlapping. A heavy panel on cheap rollers will be dragging within four winters.
Configuration is worth thinking about before ordering. A standard two-panel door gives you half the opening. Three-panel and multi-slide units give you far more, at real cost and with a header that may need attention. Pocketing panels into the wall looks superb and puts a wet track inside your framing, which we generally advise against in this climate.
Glass on a patio door is always safety glazing, so tempered is the baseline. Beyond that, a west-facing door onto a view deck is worth a low solar gain package to keep the room usable in August, and a door on the street side of a house near the highway corridor benefits from a laminated lite for quiet and security.
Replacing a patio door does not always mean replacing the frame. If the frame is square, the sill sound and the track drainage clear, panels, rollers, weatherstrip and sealed glass units are all serviceable, and that repair keeps your wall closed. We will quote both ways and let the condition decide.
Our licensed and insured team brings the right materials and equipment to every job — sill pan, back dam, head flashing, flush fin, nail fin, turned end dam — and backs the work with a written workmanship warranty. We serve Shoreline and nearby communities including Seattle, Edmonds, Lynnwood, Mountlake Terrace.
What We Handle
Everything our patio and sliding glass doors in Shoreline covers
One crew, one point of contact, and the full range of patio and sliding glass doors work in Shoreline, WA. If it is on this list we do it in house rather than handing it to a subcontractor:
- patio doors Shoreline
- sliding glass door replacement
- multi slide patio doors
- patio door sill pan
- door track drainage
- tempered patio door glass
- patio door rollers
- three panel sliding doors
- pocket sliding door units
- patio door threshold height
- deck door replacement
- patio door lock hardware
- sliding screen door
- patio door air leakage
- door sill flashing detail
- patio door cost
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Shoreline services.
Materials, equipment and how we do patio and sliding glass doors
The difference between patio and sliding glass doors that lasts and patio and sliding glass doors that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with sill pan, back dam, head flashing, flush fin, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Shoreline job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of window work in north King County means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do patio and sliding glass doors outside Shoreline
Shoreline Window Pros covers Shoreline and the surrounding communities of north King County. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Patio and Sliding Glass Doors in Seattle, WA — King County, population 737,015 residents (2020 Census)
- Patio and Sliding Glass Doors in Edmonds, WA — Snohomish County, population 42,853 residents (2020 Census)
- Patio and Sliding Glass Doors in Lynnwood, WA — Snohomish County, population 38,568 residents (2020 Census)
- Patio and Sliding Glass Doors in Mountlake Terrace, WA — Snohomish County, population 21,286 residents (2020 Census)
- Patio and Sliding Glass Doors in Lake Forest Park, WA — King County, population 13,630 residents (2020 Census)
- Patio and Sliding Glass Doors in Kenmore, WA — King County, population 23,914 residents (2020 Census)
Start on the Shoreline Window Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Shoreline Chooses Shoreline Window Pros
- ✓We open one representative wall before quoting. Finding rusted drip caps or bare sheathing costs an hour up front and prevents the change order that otherwise lands halfway through the job.
- ✓Every opening gets a pan that slopes outward, dams at its interior edge and turns up at both jambs, in flexible flashing or formed metal. In a wall with no drainage cavity, that pan is the last line of defense and we do not skip it to hit a number.
- ✓Our quotes name the NFRC certified numbers, not marketing terms. Heat loss, solar gain, light transmission and air leakage are all printed on the sticker, and those four figures are what one bid should be compared against another on.
- ✓We stock and fit both flush-fin and full nail-fin units. That choice is made by what the wall can survive, not by which one our supplier is running a promotion on this month.
The standards behind patio and sliding glass doors
Quality here is not a matter of opinion — it is written down. The patio and sliding glass doors work we do in Shoreline follows published industry standards: NFRC sets the U-factor and SHGC ratings on every window label, and ENERGY STAR defines the efficiency thresholds by climate zone. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every patio and sliding glass doors project in Shoreline gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free patio and sliding glass doors free estimate in Shoreline, or request a quote and we'll get right back to you.