Shoreline Window Pros provides professional bay and bow windows in Shoreline, WA for residential and commercial properties across north King County. A bay or bow that already exists can be rebuilt well. Adding one to a face-sealed postwar wall is a different proposition: it creates a roof, two return walls and a projecting floor where none existed, and each is a new way in for water.
Understand what a bay actually is. It is a small building bolted to the side of a larger one. It needs a head flashing where its roof meets the wall, step or apron flashing along that intersection, a properly sloped and drained roof deck, insulation in a floor that is now exposed to outdoor air on three sides, and structural support carrying the whole assembly plus anyone who sits in it.
None of that is exotic on new construction. On a 1950s Shoreline rambler it is a different proposition. The code amendment that governs our walls says the required means of drainage does not have to include an air space behind lapped or panel siding, so there is no cavity behind that cedar to receive water. Cutting a bay into it means creating a new roof-to-wall junction and betting the house on the flashing at that junction.
If you already have a bay and it is failing, that is a repair we like. The usual pattern is rot at the seat board's outer corners and staining on the ceiling inside, both fed by a head flashing that was never lapped correctly over the barrier. We strip the roof, rebuild the deck with slope, install a new head flashing with turned end dams, and reset or replace the units.
If you are adding one, we will ask what you actually want from it. Nine times out of ten the answer is light and a sense of space, and both are available from a large fixed picture unit with operable flankers at a third of the cost and none of the roof. We will quote that alternative alongside, without being asked, and let you compare them honestly.
When a bay is the right answer, the details are not negotiable. Cable or knee-brace support sized to the projection, a fully insulated seat with a rigid air barrier under it, roofing that ties into the wall barrier rather than being caulked to the siding, and a head flashing that extends past the returns and turns up at both ends.
Bow units, with four to six lites in a shallow arc, spread their load more gently and are easier to support than a deep angled bay, but they involve more mulled joints. Ask who is doing the mulling. A factory-mulled assembly with structural mullions behaves better in wind than an assembly joined on site by whoever showed up.
Glass choice matters more in a bay than anywhere else in the house, since you have three or five elevations facing different directions in one assembly. We spec them individually rather than ordering one package for the whole unit.
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 bay and bow windows in Shoreline covers
One crew, one point of contact, and the full range of bay and bow windows work in Shoreline, WA. If it is on this list we do it in house rather than handing it to a subcontractor:
- bay windows Shoreline
- bow window replacement
- garden window units
- bay window roof flashing
- bay window seat board
- cable supported bay
- knee brace bay support
- bay window insulation
- angled bay units
- bow window five lite
- bay window rot repair
- projected window units
- bay window head flashing
- bay window cost
- copper bay roof
- bay window structural support
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 bay and bow windows
The difference between bay and bow windows that lasts and bay and bow 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 bay and bow 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.
- Bay and Bow Windows in Seattle, WA — King County, population 737,015 residents (2020 Census)
- Bay and Bow Windows in Edmonds, WA — Snohomish County, population 42,853 residents (2020 Census)
- Bay and Bow Windows in Lynnwood, WA — Snohomish County, population 38,568 residents (2020 Census)
- Bay and Bow Windows in Mountlake Terrace, WA — Snohomish County, population 21,286 residents (2020 Census)
- Bay and Bow Windows in Lake Forest Park, WA — King County, population 13,630 residents (2020 Census)
- Bay and Bow 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 bay and bow windows
Quality here is not a matter of opinion — it is written down. The bay and bow 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 bay and bow 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 bay and bow windows free estimate in Shoreline, or request a quote and we'll get right back to you.