Orcas Island Siding Lopez Island has a different housing pattern than a lot of the towns we work in, and that shows up the moment a window project starts. Older farmhouses and homestead-era buildings sit alongside newer waterfront homes and additions, and very little of that mix was built to match a modern manufacturer's standard sizing chart. When a window on an older Lopez Island property needs replacing, or when an addition creates an opening that doesn't exist in any catalog, custom becomes the normal path rather than the exception.
We treat custom windows as their own category of work, separate from a straightforward stock swap. The measuring, the flashing sequence, the lead time, and the installation details all change once a window stops being an off-the-shelf size or shape. On an island in San Juan County, where salt air and wind-driven rain are part of daily conditions and getting a crew or materials back out isn't a same-day errand, getting those details right the first time matters even more than it would somewhere easier to reach.
Why Lopez Island Homes Often Need Custom Windows
A few patterns show up again and again on this island. Farmhouses and older homes were framed to whatever dimensions made sense at the time, long before window manufacturers standardized common sizes, so a like-for-like replacement often means ordering custom or reframing the opening rather than pulling a stock unit off a shelf. Additions built onto an older structure create new openings that rarely line up with anything original to the house. And waterfront or view-oriented properties frequently call for picture windows, bay windows, or oversized units sized around the view rather than around what's convenient to stock.
None of that makes a project unusual for us on Lopez Island — it's routine work here. It does mean the job starts with careful field measurement and a direct conversation about lead time, since a true custom unit is built to order, not pulled from inventory.
The Climate Factor Custom Windows Can't Ignore
Lopez Island sits out in the Salish Sea along with the rest of San Juan County, and that setting puts real, sustained stress on anything installed in an exterior wall. Salt-laden marine air moves across the island continuously, and it accelerates corrosion on hardware, fasteners, and lower-grade frame components faster than an inland site would ever see. Storms coming off the water push rain sideways into wall assemblies and window flashing instead of letting gravity handle it, which means water finds gaps and seams that would never get tested in a calmer climate. And a long moss season on shaded, north-facing walls and trim keeps surfaces damp for extended stretches, which is exactly the condition that lets organic growth take hold and work into finish and joints over time.
Custom windows raise the stakes on all three of those factors. A bay window has more perimeter to flash correctly than a standard rectangular unit. A large picture window carries more glass area and more wind load pushing against the frame. A wider sill has more flat surface for water to pool on if it isn't sloped and detailed right. None of that rules custom windows out on Lopez Island — it means the installation plan has to account for the added complexity instead of treating it like a routine stock replacement.
Where the Risk Actually Lives
On a well-built custom unit, the glass and frame material are rarely what fails first. It's the transition points — where a bay window's small roof meets the main wall, where a wide sill meets the siding below it, where a reframed or resized opening meets the original wall assembly. Those spots need extra flashing attention, and they're also the spots a rushed installation is most likely to shortcut, because doing them correctly takes real time on the job.
Custom Window Types We See on Lopez Island
- Non-standard replacement sizes — matching an opening in an older farmhouse or homestead-era building that predates modern sizing standards
- Bay and bow windows — projecting units that add interior space and view lines, but require their own small roof, support, and flashing system
- Picture and large-format windows — fixed units sized to maximize a water or pasture view, with more glass to manage structurally
- Reframed or resized openings — where the existing rough opening needs correction before any new unit can go in cleanly
- Matched sets for additions — new windows sized to sightline correctly against existing windows on an older home
- Egress and code-driven openings — bedroom or living space additions where the minimum opening size is set by code rather than preference
What a Correct Custom Window Job Involves
Measuring and Ordering
Custom work starts with precise field measurement, not a catalog lookup. We measure the actual opening, note any out-of-square or out-of-level conditions that are common in older Lopez Island buildings, and account for what the finished trim and flashing will need in terms of clearance. Because custom units are built to order, this is also where we set realistic expectations on lead time — a custom window generally takes longer to arrive than a stock size, and we'd rather say that plainly upfront than surprise you mid-project on an island where a delayed delivery means a delayed ferry booking too.
Opening Prep and Structural Considerations
Larger custom units, bay windows especially, sometimes need structural support beyond what a standard opening requires, since they carry more weight and project outward from the wall. We evaluate that during the assessment, not after demolition has already started. On older Lopez Island homes, this step is also where we typically find out whether the original framing or flashing around an opening needs repair before a new unit can go in.
Flashing and Weatherproofing
Given the exposure here, this is the step that matters most. Every custom shape changes how flashing has to be sequenced — a bay window's small roof needs its own weatherproofing separate from the wall flashing below it, a wide sill needs to shed water outward instead of letting it pool, and a resized opening needs new flashing tied cleanly into the surrounding wall rather than patched around the old detail. We build the flashing plan around the specific opening in front of us, not a generic template off a manufacturer's installation sheet.
Finish and Trim Integration
Custom windows often sit in visually prominent spots on a Lopez Island property — a bay window facing a pasture or a channel, a picture window centered on a view — so the trim and finish work needs to match the rest of the exterior cleanly. We plan that integration before the window arrives so the finished result reads as intentional rather than added on as an afterthought.
Practical Checklist Before You Order
- Confirm the opening was field-measured, not estimated from old plans or a rough guess
- Ask what the flashing plan looks like for your specific opening shape, not a generic answer
- Get a realistic lead time in writing before committing to a schedule
- Ask whether the opening needs structural review, especially for bay, bow, or oversized units
- Confirm what's covered under warranty — the window unit and the installation labor are often separate
- Ask how trim and finish will be matched to your home's existing siding
Frame Materials for This Climate
Frame material matters even more on a custom unit, since a larger or more exposed window has more surface area for salt air and moisture to work against over time. We'll walk through the honest trade-offs for your specific opening rather than defaulting to whatever installs fastest. In general, fiberglass and vinyl frames hold up to sustained coastal moisture with less ongoing upkeep than an all-wood exterior finish, which is why we lead with them on weather-facing custom installs on Lopez Island. Wood-clad interiors paired with a low-maintenance exterior cladding can still be the right call when the interior look matters to you and the exterior is properly protected — it's a trade-off worth discussing against your actual opening and budget, not a one-size answer we give to everyone.
Our Process, Start to Finish
- On-site assessment — we measure the opening, check square and level, and evaluate any structural or flashing concerns specific to its shape or size
- Honest recommendation — custom order, modified stock size, or opening reframe, explained with the reasoning behind it
- Ordering and lead time — a realistic timeline for the custom unit to arrive, since it isn't a same-week job
- Removal and opening prep — the old unit comes out carefully, and any hidden framing or flashing issues get addressed before the new window goes in
- Installation and flashing — the new unit is set, shimmed, and flashed to a sequence built for its specific shape and size
- Trim and finish — exterior trim is integrated to match the surrounding siding and architecture
Costs and Trade-Offs: Custom vs. Stock
| Factor | Stock Window | Custom Window |
|---|---|---|
| Lead time | Often available relatively quickly from stock sizing | Built to order — expect weeks, not days, depending on complexity |
| Fit | Standard sizes only; reframing needed if the opening doesn't match | Matched to the exact opening or design intent |
| Flashing complexity | Straightforward, well-documented rectangular details | Shape-specific — bay roofs, resized openings, or wide sills each need their own plan |
| Structural review | Rarely needed for a like-for-like swap | Often needed for bay, bow, or oversized units |
| Cost | Lower, especially for common sizes | Higher, reflecting manufacturing and labor complexity |
| Best fit | Simple replacements in standard, already-correct openings | Older farmhouses, additions, view-driven design, or non-standard framing |
What actually moves price on a custom job is fairly consistent: overall size and glass area, shape complexity, whether structural framing needs to be added or corrected, frame material, the condition of the existing opening, and how many units are ordered together. We won't quote a number without seeing the opening in person, but we'll walk through which of those factors apply to your project before you commit to anything.
Why a Local Crew That Already Works Lopez Island Matters
Manufacturer installation guidance is written for average, standard-size conditions in a moderate climate. Custom windows on Lopez Island rarely fit that description, and neither does the exposure here — salt air, wind-driven rain, and a long moss season stack the deck against a shortcut installation more than they would somewhere drier and calmer. A crew that has actually built out bay windows, reframed odd-sized openings on older buildings, and flashed large view windows on this island knows which parts of a manufacturer's guidance are non-negotiable here, and where extra time on flashing or sealant is worth it even when it isn't strictly required somewhere else.
That experience also matters logistically. Scheduling a custom window project on Lopez Island means planning materials delivery and crew time around ferry access, not just a calendar, and a crew that already works this island builds that into the timeline from the start instead of discovering it partway through the job. That's the kind of detail that decides whether a custom window is still performing cleanly in fifteen years or showing drafts and soft trim in five.
What to Ask Before Hiring for Custom Window Work
- Ask to see examples of custom shapes or sizes they've actually installed, not just standard replacements
- Ask how they sequence flashing for your specific opening shape
- Confirm current Washington contractor licensing and insurance
- Get a written scope of work and a realistic lead time before signing anything
- Ask how labor and the window unit are each covered under warranty
- Ask how they handle a callback or repair visit given ferry access, since that logistics question matters more here than it does on the mainland
If you're weighing a custom window for an older Lopez Island home, planning an addition, or looking at a bay or picture window to make the most of a water or pasture view, it's worth having someone look at the actual opening before you start pricing units. We offer free, no-pressure estimates for custom window projects on Lopez Island and the surrounding San Juan County islands — use the form below to get a time on the schedule.