Lynden Siding Building New in Kendall Means Getting the Windows Right the First Time
Kendall sits north of Lynden in the quieter, more rural stretch of Whatcom County — foothill country with a lot of tree cover, plenty of standing moisture through the fall and winter, and the kind of long, wet shoulder seasons that define this part of Washington. When you're building new here, the window installation isn't something you fix later. It happens once, during framing, before the siding goes on and covers up whatever was done underneath. Get it right and the house stays dry for decades. Get it wrong and you're chasing rot and staining behind the trim in five to ten years, usually right around the window corners where builders cut the flashing sequence short.
We install new-construction windows for homeowners and general contractors building in Kendall and throughout the greater Lynden area. This page covers what that work actually involves, what the local climate demands from the install, and how our process fits into a build schedule without slowing the crew down.
New Construction vs. Replacement — Why the Distinction Matters
New-construction windows have a nailing fin around the perimeter of the frame that gets fastened directly to the sheathing before the weather-resistive barrier (WRB) and siding go on. That's different from a retrofit or "pocket" replacement window, which gets inserted into an existing frame after the siding is already in place. The two jobs use different products, different flashing details, and different sequencing — and the biggest advantage of a new-construction install is that we get to build the water management system in layers, from the sill pan up, instead of working around what's already there.
Done correctly, a new-construction window installation is one of the most reliable, leak-resistant ways to get glass into a wall. Done carelessly — flashing tape run in the wrong order, no back-dam on the sill pan, fasteners through the flange instead of proper shimming — it becomes one of the most common sources of hidden water intrusion in new homes, because nobody sees the mistake until the drywall or siding comes off years later.
What Kendall's Climate Asks of the Install
Whatcom County gets a lot of rain, and a lot of it comes sideways during fall and winter storms. Areas closer to the water deal with salt-laden air that accelerates corrosion on fasteners and hardware; Kendall is more inland and tree-shaded, so the bigger local concerns are prolonged dampness, shade that slows drying time, and the moss and algae growth that shows up on any surface that stays wet too long. That combination means:
- Flashing details have to shed water outward at every layer, not rely on sealant alone to do the job
- Sill pans need a back-dam so any water that does get past the window has somewhere to go besides the framing
- Fasteners and flashing tape need to hold up to sustained moisture exposure, not just occasional rain
- Wood trim and sills benefit from extra attention to drainage gaps, since shaded, damp conditions are exactly where moss and mildew take hold first
What a Correct New-Construction Install Involves
There's a sequence to this, and skipping steps is the single biggest reason windows leak in new homes. Here's the order we follow on every install:
- Rough opening check — verify the opening is square, plumb, and sized correctly for the window before anything goes in
- Sill pan installation — a sloped, back-dammed pan under the window that directs any intrusion back out, not into the wall cavity
- Window set and shim — the unit gets leveled, plumbed, and shimmed at the correct points so it operates properly and doesn't bind or sag over time
- Fastening — nailing fin secured per the manufacturer's schedule, not just at the corners
- Flashing tape, in the right order — sides first, then head flashing, integrated with the WRB so water is always directed downward and outward, shingle-style
- Insulation at the gap — low-expansion foam or backer rod between the frame and rough opening, so the window is sealed without bowing the frame
- Interior and exterior sealant — compatible sealants at the right joints, with a weep path left open so trapped moisture can still escape
Every one of those steps has to happen in order and has to tie into the WRB correctly. A window that looks perfectly installed from the outside can still be set up to fail if the flashing was layered wrong underneath.
Choosing Window Products for a Kendall Build
Material choice matters less than installation quality, but it's still worth getting right for the local climate. Here's how the common options compare for a new build in this area:
| Frame Material | Moisture Performance | Maintenance | Typical Fit |
|---|---|---|---|
| Vinyl | Good — won't rot, handles sustained damp exposure well | Low — occasional cleaning | Most cost-effective, wide style range |
| Fiberglass | Excellent — very stable in wet/dry cycling, low expansion | Low | Best for larger openings, higher upfront cost |
| Wood-clad (vinyl or aluminum exterior) | Good on the exterior face; interior wood needs protection from any water that reaches it | Higher — cladding protects the frame, but any breach exposes wood | Interior wood look with exterior durability, premium cost |
| Aluminum | Fair — conducts cold and can condense in our damp winters without a thermal break | Low | Less common in residential builds here |
We don't push one brand or line over another as a blanket rule — the right call depends on the home's design, budget, and how much glass is in the elevation. What we do insist on is a nailing-fin, new-construction-rated product with documented installation instructions we can follow to the letter, because that's what keeps the manufacturer's warranty intact if there's ever a question later.
How the Process Works
1. Plans and Product Selection
We review the window schedule from the plan set (or help build one if you're still deciding), talk through sizes, styles, and material, and confirm lead times — some product lines run several weeks out, which matters for keeping a build schedule on track.
2. Coordination with the Build Timeline
New-construction windows go in after the sheathing and WRB are up and before siding starts. We work directly with the general contractor or framing crew to hit that window in the schedule — literally and figuratively — so nothing sits exposed longer than it needs to.
3. Installation
Every unit gets set following the sequence above: sill pan, set and shim, fasten, flash, insulate, seal. We don't shortcut the flashing order to save time, even under schedule pressure.
4. Walkthrough
Before siding covers the work, we walk the openings so you (or your GC) can see the flashing and sill pan details firsthand. Once siding goes on, that layer isn't visible again — this is the point to catch anything, not after move-in.
Cost Factors for New-Construction Windows
| Factor | Why It Affects Cost |
|---|---|
| Number and size of openings | More glass and larger units mean more material and labor per window |
| Frame material | Vinyl runs least expensive; fiberglass and wood-clad cost more upfront |
| Window type | Fixed picture windows install faster than operable casements or sliders with hardware |
| Access and story height | Second-story and hard-to-reach openings take longer and may need staging |
| Site conditions | Weather delays, timing around the framing crew, and schedule coordination all factor in |
We give straightforward pricing based on the actual window schedule and product line — not a vague per-window average that falls apart once you get into real quotes.
Why Hiring a Crew That Already Works Kendall Builds Matters
New-construction window work sits at the intersection of two trades — framing and exterior finish — and a crew that only knows one side of that handoff tends to leave gaps. We install in Lynden and Kendall regularly enough to know how local GCs sequence a build, what inspectors here are looking for at the sheathing and window stage, and how to flash correctly for a climate that stays damp and shaded for a big chunk of the year. That's not something you can shortcut by reading a manufacturer's install sheet the morning of the job.
It also means we're not guessing at how Whatcom County's rain patterns and long moss season affect long-term window performance — we see the results of both good and bad installs on homes around here, and we build every new install to hold up to that, not just to pass inspection on day one.
A Practical Checklist Before Your Windows Go In
- Confirm the window schedule matches the current plan set — sizes and styles change during design more often than people expect
- Verify lead times against your framing schedule so windows arrive when the openings are ready
- Ask what sill pan and flashing tape products will be used, and confirm they're compatible with your WRB
- Request a walkthrough of the flashing details before siding covers the work
- Keep the manufacturer's installation documentation on file — it's what protects your warranty if a question comes up later
- Budget a buffer for schedule shifts; window lead times are one of the more common causes of build delays
If you're building in Kendall or anywhere around Lynden and want the window package handled correctly from the framing stage forward, we're happy to walk your plans, talk through product options, and give you a straightforward, no-pressure estimate. Use the form below to get started.