Shoreline Window Pros provides professional double-hung windows in Shoreline, WA for residential and commercial properties across north King County. The double-hung is not native to this housing stock, and knowing that changes the conversation. Shoreline's postwar plats were built with wood casements, awnings and fixed picture units, then re-fitted in the 1980s with horizontal sliders. A double-hung here is usually a style choice rather than a like-for-like swap.
That is a perfectly good reason to want one. Two sashes that both move give you a top vent that is out of reach of small children and safe to leave open in weather, and the tilt-in function on modern units makes cleaning an upstairs window a job you can do from indoors. The look also suits the handful of pre-1940 houses scattered through the older parts of town.
But it carries a cost you should know before ordering. A double-hung has a meeting rail, two balance systems and four times as many weather-sealing surfaces as a fixed unit, so its air-leakage figure on the NFRC label is almost always worse than a casement of the same quality. In a wind-driven rain climate that difference is real, and it shows up as draft at the meeting rail on the exposed elevations.
Where the frame we work from bites is on the install. If you already have double-hungs in sound wood frames, we can usually fit a sash pack: new jamb liners and new tilting sashes into the existing frame, with the exterior casing, head flashing and siding never disturbed. On a face-sealed wall that is the least risky water outcome available and it is not close.
We recommend it more often than most contractors will, because the alternative means opening a wall that Washington's code does not require to have a drainage cavity behind the siding. Once that cedar is off, the barrier underneath is whatever a 1954 crew stapled up, and re-integrating a new fin into it is genuinely delicate work in a climate with a short dry season.
Full-frame replacement is still the right call when the frame is rotted at the sill, when the pulleys and weight pockets have made the jambs into open chases, or when you are changing the opening size. In those cases we take everything back to the framing, rebuild the rough sill with a slope, pan it, and flash the head with a hemmed metal drip.
Two spec notes. Ask for constant-force coil balances rather than block-and-tackle on anything tall, because they hold a heavy sash better over time. And if you are matching a grid pattern to neighboring windows, ask for simulated divided lites with a spacer bar inside the glass, since flat grilles between the panes read as fake from the street.
Bring us photographs of the existing sash and jamb before you shop. Ten minutes of looking tells us whether you are in sash-pack territory or full-frame territory, and those two numbers are far apart.
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 double-hung windows in Shoreline covers
One crew, one point of contact, and the full range of double-hung windows work in Shoreline, WA. If it is on this list we do it in house rather than handing it to a subcontractor:
- double hung windows Shoreline
- single hung replacement windows
- tilt in sash windows
- double hung sash balances
- jamb liner replacement
- sash pack window inserts
- double hung window repair
- pocket window replacement
- grid pattern double hung
- double hung window cost
- weight and pulley sash
- double hung air leakage
- tilt wash double hung
- double hung screens
- upper sash window operation
- double hung window sizes
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 double-hung windows
The difference between double-hung windows that lasts and double-hung windows 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 double-hung windows 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.
- Double-Hung Windows in Seattle, WA — King County, population 737,015 residents (2020 Census)
- Double-Hung Windows in Edmonds, WA — Snohomish County, population 42,853 residents (2020 Census)
- Double-Hung Windows in Lynnwood, WA — Snohomish County, population 38,568 residents (2020 Census)
- Double-Hung Windows in Mountlake Terrace, WA — Snohomish County, population 21,286 residents (2020 Census)
- Double-Hung Windows in Lake Forest Park, WA — King County, population 13,630 residents (2020 Census)
- Double-Hung Windows 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 double-hung windows
Quality here is not a matter of opinion — it is written down. The double-hung windows 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 double-hung windows 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 double-hung windows free estimate in Shoreline, or request a quote and we'll get right back to you.