How far in advance of framing should windows be ordered for a new build?

For custom sizes or specialty glazing packages, ordering 6-10 weeks ahead of when framing will be ready is typical, since lead times can run longer for corrosion-rated hardware or non-standard sizes. We coordinate directly with your builder's schedule so the windows arrive when the rough openings are actually ready, not before.

What should I ask a contractor before hiring them for new-construction window installation?

Ask them to walk you through their flashing and sill pan sequence specifically, not just what window brand they install — the brand matters far less than whether the installer integrates it correctly with the house wrap and siding. Also ask whether they've worked on the island before, since ferry logistics and exposure conditions catch crews off guard who haven't.

Do I have to use a specific window brand, or can I choose my own?

We'll work with most reputable window manufacturers; our job is to make sure whatever line you choose is installed correctly and, where hardware or fasteners fall short for salt-air exposure, we upgrade those components regardless of the base spec. We'll tell you honestly if a product you're considering has known maintenance trade-offs for this environment.

What's the real difference between double-pane and triple-pane glazing for a coastal build?

Triple-pane offers better insulation and sound dampening, which can be worth it on wind-exposed elevations, but it adds cost and weight that isn't necessary on every wall. We typically recommend matching the glazing package to each elevation's actual exposure rather than upgrading the whole house uniformly.

Does Lummi Island's ferry access affect how window installation projects are scheduled?

Yes — material deliveries and crew scheduling both have to work around ferry sailing times, so we build extra buffer into the timeline compared to a mainland Birch Bay job. Being local means we already plan for that instead of it becoming a surprise delay mid-project.

Lummi Island New-Construction Windows | Birch Bay Crew

Building New on Lummi Island Means Building for the Weather You Actually Get

Lummi Island sits out in the water, which is exactly why people want to build there and exactly why the building envelope has to be taken seriously from day one. Salt-laden air off the water accelerates corrosion on anything metal that isn't rated for it. Driving rain off Rosario Strait and Hale Passage doesn't fall straight down — it comes in sideways against west and south-facing walls, which means window flashing and sill pans aren't optional details, they're the difference between a dry wall assembly and a slow leak nobody notices until the drywall or trim starts showing it. And Whatcom County's long, damp moss season means anything with a horizontal ledge, a poorly sealed joint, or a frame material that holds moisture is going to grow something green within a couple of seasons.

None of that is a reason to avoid building on the island — it's a reason to get the window package right the first time, because re-doing window work on a finished new build is far more disruptive and expensive than getting it right during framing.

New Construction Windows Are a Different Job Than Replacement Windows

A lot of homeowners assume "installing windows" is one job. It isn't. New-construction windows have a nailing fin built into the frame and get installed before the siding or exterior trim goes on, which means the window becomes part of the water management system for the whole wall — not just a hole with glass in it.

New-construction windows integrate with the house wrap, flashing tape, and sill pan as one continuous drainage plane
Replacement (pocket) windows fit inside an existing frame and rely on the original opening already being sound — not relevant on a new build
New-construction installs give us access to the rough opening from both sides, which matters a lot on a site with this much wind-driven rain
Getting the sequencing wrong — siding installed before flashing is properly lapped — is one of the most common causes of hidden water damage in new coastal builds

On a new build, we're not fixing someone else's opening. We're building the opening, the flashing, and the window into one water-tight system, which is the only way to actually get ahead of this climate instead of reacting to it later.

What a Correct Installation Actually Involves

There's a lot of daylight between "the window is in and it looks fine" and "the window is installed correctly for a site exposed to salt air and driving rain." The visible parts — trim, caulk lines, operation of the sash — are the easy part. The parts that actually determine whether the wall stays dry for the next 20-plus years are the parts you can't see once the siding goes on.

The sequence that matters

Rough opening is checked for square, level, and correct dimensions before the window ever shows up on site
A sloped sill pan is installed at the base of the opening so any water that gets past the window has somewhere to drain — not somewhere to pool
Flashing tape is applied in the correct shingle-lap order (sill, jambs, then head) so water sheds outward and down, never into the wall cavity
The window is set, shimmed for square and plumb, and fastened through the nailing fin per the manufacturer's schedule — not just "enough screws to hold it"
Head flashing and house wrap integration finish the water path above the window before siding closes everything in
Interior air sealing and insulation around the frame are completed separately from the exterior weatherproofing — they're two different jobs with two different purposes

Skip or rush any one of those steps and the window itself can be a perfectly good product and the wall will still leak eventually. This is where most warranty disputes on new builds actually originate — not from a defective window, but from an installation shortcut that wasn't visible at final walkthrough.

Choosing a Window Line for a Salt-Air, High-Moisture Site

We don't push one brand across every job. What we do is steer clients away from materials and configurations that create extra maintenance burden or moisture risk in this specific environment, and toward ones that hold up with reasonable upkeep.

Frame Material	How It Handles This Climate	Trade-Offs to Know
Vinyl	Doesn't corrode from salt air; good moisture resistance; widely available in Northwest-rated packages	Lower-end vinyl can discolor or become brittle over decades; quality varies a lot by manufacturer
Fiberglass	Very stable in temperature and moisture swings; strong resistance to warping	Higher upfront cost than vinyl
Wood / wood-clad	Classic look, good insulation value	Needs consistent exterior maintenance in a salt and moss environment; we're cautious recommending unclad wood exteriors here
Aluminum	Strong and slim sightlines	Poor insulator unless thermally broken, and standard hardware/fasteners need to be corrosion-rated near salt water

Whatever line we're working with, we insist on corrosion-resistant fasteners and hardware for anything within the island's salt-air zone — that's a standard we hold regardless of what the base window spec calls for, because generic hardware is one of the first things to fail out here.

Our Process, Start to Finish

We work new-construction windows into the framing schedule, not around it — coordinating with your builder or general contractor so the window package shows up when the rough openings are ready, not before and not after.

Plan review: we check window sizes, egress requirements, and rough opening dimensions against the actual framed structure, not just the drawings
Product selection: we walk through frame material, glazing package, and hardware options based on which wall faces catch the worst weather
Flashing and sill pan install: done before any window is set, using a consistent lapped sequence
Window setting: shimmed, squared, and fastened to manufacturer spec, checked for smooth operation before we move on
Exterior integration: house wrap and flashing tied in so the window is part of one continuous water barrier
Final walkthrough: we check every unit for operation, seal, and trim before we call the job done

Pre-Install Checklist We Run on Every Lummi Island Build

Rough openings confirmed square, level, and to spec before window delivery
Sill pans specified and on hand — not substituted with caulk alone
Flashing tape rated for the temperature range we'll be installing in (cold-weather tapes behave differently than warm-weather ones)
Fastener and hardware corrosion rating confirmed for salt-air exposure
Glazing package matched to sun exposure and prevailing wind-driven rain direction for that elevation
Coordination confirmed with the builder's framing and siding schedule so there's no gap where an opening sits exposed to weather

Why It Matters That We're a Birch Bay Crew Already Working This Area

Lummi Island isn't a place you learn on the fly. Access is by ferry, scheduling has to account for that, and the exposure conditions on the island's west and south sides are more aggressive than what a lot of mainland Whatcom County builds ever deal with. A crew that's unfamiliar with that will often default to generic installation practices that are fine in a sheltered inland location and inadequate here.

Being based in Birch Bay means we're already used to building for salt air, coastal wind, and the same long moss season Lummi Island gets. We're not commuting in from somewhere with a completely different climate and guessing at what this site needs. We know what fails first out here, and we build against that from the start — not after a callback.

What to Expect in the First Few Years

Even a correctly installed window package benefits from a little seasonal attention on a site like this. Rinse accumulated salt residue off frames and hardware periodically, especially after storms. Keep an eye on caulk lines at trim joints for cracking, since coastal UV and temperature swings work caulk harder than an inland site would. And check weep holes and drainage tracks aren't clogged with debris or moss buildup heading into the wetter months. None of this is heavy maintenance — it's the kind of upkeep that keeps a correctly installed system performing the way it was designed to for its full service life.

If you're framing up a new build on Lummi Island, or planning one, we're happy to walk the plans with you and give you a straightforward, no-pressure estimate on the window package — just fill out the form below.