What a Siding Install Day One Looks Like in Bellingham, WA

Updated August 2026 · Alpine Exteriors · WA contractor license ALPINI751OW

The Direct Answer

On day one, Alpine Exteriors' crew doesn't hang a single piece of siding. The first day is spent protecting your property, stripping the old cladding, and inspecting the wall sheathing underneath for rot or moisture damage before anything new goes up — because in Whatcom County, what's hiding behind the old siding matters more than what the new siding looks like.

The Detail Behind It

A siding tear-off in Bellingham, Ferndale, Lynden, or out toward Blaine and Birch Bay isn't a cosmetic swap. Most of the homes we work on were built or last re-sided before current moisture-management practices were standard, so the crew treats day one as a diagnostic day as much as a demolition day. Here's roughly how it breaks down.

• Site protection first. Tarps go down over landscaping, gutters get temporary guards or downspout diverters, and window and door openings get covered. This region's weather doesn't wait for a good day to rain, so protecting the yard and the interior from an unplanned shower is the first job, not an afterthought.
• Controlled tear-off, section by section. Rather than stripping an entire elevation at once, the crew typically works one wall or one manageable section at a time, especially on the sides that catch the worst weather. That limits how much sheathing sits exposed if the forecast turns.
• Sheathing and framing inspection. This is the part that actually determines the schedule and, sometimes, the budget. The crew is looking for soft or delaminating OSB, discolored or spongy framing near window sills and butt joints, and any sign of long-term moisture intrusion behind old caulk lines. On older Whatcom County homes, it's common to find at least some wood rot around windows, at deck ledgers, or near ground-contact trim, even when the siding looked fine from the street.
• Documentation before covering anything. Any damaged sheathing or framing gets photographed and discussed with the homeowner before it's repaired or replaced. This is also when the crew confirms flashing details at windows, doors, and any roof-to-wall intersections, since those are the spots most likely to have failed quietly over the years.
• Staging materials and confirming the water-resistive barrier plan. Housewrap or building paper, flashing tape, and trim stock get staged so the crew isn't waiting on deliveries mid-project. The specific water-resistive barrier and its lap sequence get confirmed against the wall assembly the county will expect to see if it's an inspected job.

By the end of day one, most jobs have one or two walls stripped down to sheathing, a punch list of any repairs needed, and a clear read on whether the original timeline still holds. If rot repair turns out to be more extensive than expected, that gets flagged immediately rather than discovered halfway through installation.

What Makes This Region Different

Siding work in Whatcom County isn't the same job as siding work in a dry climate, and it isn't the same job as siding work in a hurricane zone either — wind-driven rain here is a moisture problem, not a structural-load problem, and the day-one plan reflects that.

• Persistent rain, not occasional storms. The Pacific Northwest's rainy season means long stretches of low-intensity, sustained precipitation rather than short, hard downpours. That changes tear-off strategy: crews limit how much wall is exposed at once and keep a close eye on the forecast rather than the radar.
• Moss and algae growth. Homes near the water in Bellingham, Birch Bay, and the islands, or under tree cover in Sudden Valley and the Lynden foothills, often show moss and algae staining on the old siding and especially on north-facing walls. That growth is usually cosmetic on the surface but can trap moisture against the substrate, which is one more reason the sheathing inspection matters.
• Wood rot from years of marginal drainage. Older lap siding and some fiber-cement installs in this area weren't always detailed with rainscreen gaps or properly lapped house wrap. Combined with decades of rain, that shows up as soft sheathing, rotted trim, or rusted fasteners — findings that are common enough that we plan for the possibility on every tear-off rather than treating it as a surprise.
• Wind-driven rain off Bellingham Bay and the Strait. Homes with direct exposure toward the water — parts of Blaine, Birch Bay, and west-facing Bellingham lots — take rain sideways during winter storms. That's why flashing details at windows and wall penetrations get extra attention on day one; a siding job that looks right but is flashed wrong will leak in exactly those conditions.
• Freeze-thaw cycling in the foothills. Properties up toward Sudden Valley and the foothills near Mt. Baker see more freeze-thaw cycling than the lowland areas closer to the bay. Repeated freezing and thawing can accelerate damage to already-compromised siding and trim, which is one more reason those homes sometimes need more substrate repair than a similar house closer to sea level.
• Washington State Energy Code. Depending on the scope of the project and whether wall insulation is being added or upgraded, the assembly may need to meet current Washington State Energy Code requirements for the building envelope. That's confirmed early — ideally before tear-off, not after — so the housewrap, insulation, and siding assembly staged on day one are the ones that will actually pass inspection.

What the Homeowner Should Actually Do

You don't need to do much on day one, but a few things make the day smoother and reduce surprises:

• Clear the perimeter. Move patio furniture, potted plants, hoses, and anything breakable away from the walls being worked on. It's easier to protect an empty area than to work around it.
• Move vehicles. Debris disposal, material staging, and dumpster or trailer placement all need driveway or curb space. Ask ahead of time where the crew wants vehicles parked.
• Plan for noise and some dust indoors. Tear-off is loud, and older siding can shed dust and debris that vibrates into the house, especially near windows. If you work from home, day one is a reasonable day to plan around that.
• Ask to see what's behind the old siding. A reputable crew will show you any rot or moisture damage they find rather than just quoting a repair line item. If nobody offers to show you photos or walk you through what they found, ask.
• Expect a real number on repairs, not a guess. Rot and sheathing repair costs vary widely depending on how much is affected — a small area around one window is a different job than a full wall section. A contractor should be able to give you a specific range once they've actually opened the wall, not before.
• Don't skip the permit conversation. Depending on scope, your project may need a building permit and inspection sign-off, particularly if it involves structural repair or an energy code-driven change to the wall assembly. Confirm this before day one, not after the walls are closed up.

It's also worth being honest with yourself about timing: if your crew finds significant rot, the project may run longer than the original estimate. That's not a sign of a bad contractor — it's the reason day one exists as a diagnostic step in the first place. A crew that never finds anything unexpected on a 20- or 30-year-old Whatcom County home is either working on an unusually well-maintained house or not looking closely enough.

FAQ: Siding Tear-Off and Day-One Questions

Will you find rot before you start, or only after tear-off begins?

Some rot is visible during the initial estimate walk-through — soft spots near ground contact, staining around windows, or spongy trim are usually detectable by hand and eye. But a meaningful amount of moisture damage only becomes visible once the old siding and building paper come off, which is exactly why day one includes a full sheathing inspection before any new material goes up.

How much of my house will be exposed at once?

The crew generally works section by section rather than stripping an entire home down at once, particularly during the rainier months. The exact pace depends on the size of the job, the crew size, and the forecast, but the goal is to never leave more wall exposed than can reasonably be protected or closed back up if weather moves in.

Does rain stop the work entirely?

Light rain doesn't necessarily stop tear-off or repair work, since walls can be protected with tarps and work can shift to sections that are already covered. Sustained heavy rain or high wind, especially wind-driven rain off the water, is more likely to pause exterior work for safety and to keep sheathing dry. That's part of why the schedule given at the start of a project is a range rather than a fixed date.

Will the new siding meet Washington's energy code requirements?

If the project involves adding or upgrading wall insulation, the assembly needs to align with current Washington State Energy Code requirements for the building envelope. Alpine Exteriors, holding Washington contractor license ALPINI751OW, confirms the applicable code requirements for your specific scope before materials are ordered, so what's staged on day one is what will actually satisfy inspection.

Ready to See What's Behind Your Siding?

If your siding is original to the house, showing moss staining, or you've noticed soft spots near windows and trim, the only way to know what you're actually dealing with is to open a wall and look. We serve homeowners across Bellingham, Ferndale, Lynden, Blaine, Birch Bay, Sudden Valley, and the islands, and we'll walk you through exactly what we find on day one — rot, moisture damage, or none at all — before we quote you a final number. Contact Alpine Exteriors to schedule an on-site estimate and get a straight answer about what your walls actually need.