Blaine Point Roberts is a strange place to build. It sits on its own small peninsula, cut off from the rest of Whatcom County by water and a border crossing, and it takes the weather that comes off the Strait of Georgia and Boundary Bay head-on. If you're framing a new home out there, the windows are one of the few components that have to get everything right the first time — water management, air sealing, and hardware that won't corrode — because callbacks on a finished, sided house are expensive and disruptive. This page is about that one job: installing new-construction windows correctly in a Point Roberts build, and why it's worth hiring a crew that already knows the site conditions before your framer calls for window delivery.
New-Construction Windows vs. Replacement — Why the Distinction Matters
A lot of homeowners use "window replacement" and "new windows" interchangeably, but they're different products installed in completely different ways. Replacement windows are built to slide into an existing opening without disturbing the surrounding siding or trim. New-construction windows have a nailing fin around the perimeter of the frame, and they're meant to be installed before the exterior finish goes on — while the wall is still open to the weather-resistive barrier (WRB) and stud framing. That fin is what ties the window into the wall's water management system, and it only works if the surrounding materials are lapped in the correct order.
The Flashing Sequence That Actually Matters
On a new build, the rough opening gets a sill pan first, then the window goes in, then flashing tape laps over the nailing fin at the sides and top in a specific shingle-style order — bottom, sides, top — so that any water working its way down the wall sheds over the fin instead of behind it. Skip a step or reverse the order, and you've built a funnel that carries water straight into the wall cavity. This is true on any new-construction job anywhere, but on a site with Point Roberts' rain and wind exposure, a sequencing mistake shows up as a leak much sooner than it would somewhere sheltered.
What Point Roberts' Exposure Does to a Window Installation
Point Roberts is surrounded by water on three sides, and that has real consequences for a window install, not just for how the finished house looks.
Salt Air and Hardware Choices
Salt-laden air corrodes the wrong fasteners, flashing metals, and window hardware faster than most people expect, especially on the sides of the house that face open water. We spec corrosion-resistant fasteners and compatible flashing materials for coastal jobs rather than whatever happens to be in the truck, because a fastener that rusts out in a few years takes the water seal with it.
Driving Rain and Wind-Driven Water
Storms coming off the Strait of Georgia don't just drop rain straight down — wind pushes it sideways and up under laps that would hold fine in a calm rain. That's exactly why the flashing order described above matters more here than in a sheltered inland lot: a marginal lap that never gets tested by wind-driven rain in one location can fail within its first winter in another.
Moss Season and Slow-Drying Assemblies
Whatcom County's long wet season keeps north-facing and shaded wall sections damp for weeks at a stretch, and that's where moss and algae take hold on trim and siding. Moss holds moisture against the wall longer than bare material would, which is hard on any assembly that wasn't detailed to dry out between storms. Getting the window flashing and the WRB lap right up front reduces how much that slow-drying environment can work against the house later.
Getting Crews and Materials to an Exclave
Point Roberts isn't reachable from the rest of Whatcom County by road — getting there means crossing into Canada and back out at the border. That's a fact of life for every trade working out there, not just us, and it affects scheduling in ways a mainland job doesn't. Material deliveries, window orders, and subcontractor visits all need to be planned with that crossing in mind, and a crew that's made the trip before knows how to sequence a workday so the border isn't eating half of it. We coordinate window delivery timing and permitting through the appropriate Whatcom County channels before we ever schedule the install, so the framer isn't left waiting on an open rough opening in the rain.
Choosing a Window Package for New Construction Here
Frame material and glass package both affect how a window performs in a marine climate. There's no single "best" answer for every house — it depends on budget, sun exposure, and how much upkeep you want to take on — but here's how the common options stack up for a Point Roberts build.
| Frame Material | Marine Climate Durability | Maintenance | Relative Cost |
|---|---|---|---|
| Vinyl | Good; doesn't corrode or rot, but can flex in high heat/cold swings | Low — occasional cleaning | Lowest |
| Fiberglass | Very good; stable in temperature swings, holds up well to salt air | Low | Mid to upper |
| Wood-clad | Good if detailed and finished correctly, but the exterior clad layer is doing the weather work | Higher — finish and seals need periodic attention | Highest |
On the glass side, a dual-pane, low-E unit with argon fill is the standard baseline for new construction in this climate, and it's usually the right call for most rooms. Where a wall faces open water and gets more direct wind exposure, a heavier-duty glazing package can be worth the upgrade — that's a conversation worth having room by room rather than deciding it for the whole house at once.
Our New-Construction Window Install Process
- Verify rough openings are square, level, and sized correctly before the windows arrive on site.
- Install sill pan flashing at the base of each opening, sloped to drain outward.
- Set the window, check for square and proper reveal, and fasten through the nailing fin per the manufacturer's schedule.
- Flash the fin in the correct shingle-lap order — sill, jambs, then head — tying into the WRB above and below.
- Seal and backer-rod the interior side per the window manufacturer's installation instructions, not a generic bead of caulk.
- Insulate the gap between the frame and rough opening with a low-expansion foam or backer material rated for window use.
- Walk every opening before siding goes on, while the flashing is still visible and correctable.
That last step is one we don't skip. Once siding covers the flashing, a mistake is invisible until it becomes a stain on the drywall.
Common Failure Points We See
Most window leaks on new construction trace back to a handful of repeatable mistakes, and they're avoidable if someone is paying attention during the rough-in:
- Flashing tape applied out of shingle-lap order, so water runs behind it instead of over it
- Nailing fins stapled or nailed without flashing tape sealing the fin to the WRB
- No sill pan, so any water that gets past the window sill sits directly on the framing
- Incompatible sealants or tapes used together, which can fail to bond or degrade over time
- Standard fasteners and hardware used in high salt-exposure locations, leading to early corrosion
- Windows fastened before the opening was checked for square, straining the frame and the weather seal
What to Ask Before You Hire for a Point Roberts Job
- Have you installed new-construction windows on Point Roberts or similar coastal-exposure sites before?
- How do you handle sill pan flashing and shingle-lap sequencing on this specific job?
- What fasteners and flashing materials do you use in salt-air exposure, and why?
- How do you plan delivery and crew scheduling around the border crossing?
- Will the flashing be inspected and photographed before siding covers it?
- What's included in your warranty on the installation itself, separate from the window manufacturer's product warranty?
Why a Blaine Crew That Already Works Point Roberts
A crew based in Blaine that regularly works Point Roberts jobs has already solved the logistics problems that slow down an outside contractor — border timing, material staging, and knowing which sides of a given lot take the worst of the wind and rain. That familiarity translates into fewer surprises on your schedule and a crew that isn't learning the site's exposure for the first time on your dime. We treat every new-construction window opening on a Point Roberts build the same way: get the water management right before the walls close up, because that's the only point in the project where it's cheap and easy to fix.
If you're framing a new home in Point Roberts or planning one, we're glad to walk the plans with you and talk through window package and flashing details before your framer needs an answer. Request a free, no-pressure estimate using the form below.