Home Exterior Inspection Checklist for Alger, WA

Updated August 2026 · Alpine Exteriors · WA contractor license ALPINI751OW

Alger sits at the base of the Chuckanut range, tucked among fir and cedar between Bellingham and Mount Vernon, close enough to Samish Bay to feel Skagit County's marine-influenced weather but shaded enough by tree cover to have its own microclimate. Homes here take a slow, steady beating from moisture rather than a dramatic one. A once- or twice-a-year walk-around with this checklist can catch the small problems — a lifted shingle tab, a clogged downspout, a soft deck board — while they're still cheap to fix. This is a general homeowner reference, not a substitute for a licensed inspection, and it isn't a guarantee that your home is problem-free.

Why This Checklist Matters in This Region

Skagit County's exterior wear pattern is driven mostly by water, not wind extremes or freeze-thaw cycles common elsewhere. Alger gets long stretches of steady winter rain between roughly October and April, and the surrounding conifer canopy means many roofs — especially north- and east-facing slopes — stay shaded well into the day even on clear afternoons. That shade keeps moss and algae established on roofing material far longer than it would last on an open, sun-exposed roof. Add in the needle and cone litter that falls constantly from surrounding fir and cedar trees, and gutters, valleys, and downspouts here clog faster than in a more open subdivision.

Wind is a secondary but real factor. Storms that funnel down the Skagit flats or track in off the Strait of Juan de Fuca and Samish Bay can push driving rain sideways against siding and window trim, which is why caulking and flashing details matter more here than they would in a drier climate. Alger is inland enough, and shielded enough by the Chuckanut foothills, that salt air is a much smaller concern than it is for homes directly on Camano Island, Whidbey Island, or the immediate Anacortes waterfront — it's worth knowing that distinction so you don't over-spend on corrosion-resistant hardware you don't need. The foothill elevation does mean Alger sees the occasional cold snap with ice or light snow that flatland Skagit Valley towns like Mount Vernon or Burlington might miss, so a quick check for ice-dam risk in a hard freeze is still worth doing. Finally, any window, door, or insulation work you do should account for the Washington State Energy Code, which sets minimum performance requirements for replacement fenestration and building envelope work in this climate zone.

The Checklist

Roof

• Look for moss or algae on shaded or north-facing slopes — Alger's tree cover keeps these areas damp long after the rest of the roof has dried, and moss holds water against the shingle surface.
• Check for lifted, cracked, curled, or missing shingles or shakes — repeated wet-dry cycling through a long rainy season gradually loosens fasteners and edges.
• Inspect flashing around chimneys, skylights, and roof-to-wall transitions — these junctions are the most common source of slow leaks during extended rainy stretches.
• Clear needle and leaf debris out of roof valleys — matted needles from surrounding conifers trap water against the roof deck instead of letting it shed.
• Check the attic for daylight, water stains, or damp insulation — a small leak can go unnoticed under a shaded roof for months in a mild, humid climate.

Gutters and Downspouts

• Confirm gutters are clear of needles and leaf litter and pitched to drain — clogged gutters are one of the most common calls we get in this area simply because of how much tree debris falls locally.
• Check that downspouts extend water well away from the foundation — soggy soil against the foundation is a slow but real problem given how much total rainfall the region gets.
• Look for sagging sections or pulled fasteners — the combined weight of standing water and wet debris stresses gutter hangers over time.
• After a hard freeze, check for ice buildup at gutter edges — Alger's foothill elevation means it sees occasional icing that flatter valley towns don't.

Windows and Doors

• Check caulking and weatherstripping around every window and door — gaps let driving rain and cold air in, and consistent air-sealing is part of what the Washington State Energy Code expects from a well-performing envelope.
• Look for fogging or moisture trapped between panes on double-glazed windows — this indicates a failed seal, usually after years of humidity cycling, and it isn't repairable, only replaceable.
• Check sills and lower window trim for soft or discolored wood — splashback from heavy rain concentrates moisture right at sill level.

Siding and Trim

• Check siding near ground level for staining, swelling, or delamination — splashback and prolonged dampness show up here first.
• Inspect fascia, trim, and corner boards for peeling paint or soft wood — these thinner wood elements absorb and hold moisture faster than the main siding field.
• Look for gaps or separated seams, especially on walls that face prevailing weather off the Skagit flats or Samish Bay — wind-driven rain finds these openings during storms.

Decks

• Check the ledger board where the deck attaches to the house, including the flashing above it — this is one of the most common failure points on older decks in wet climates.
• Press-test boards for soft or spongy spots, particularly near the ground or under planters — trapped moisture rots decking from underneath before it's visible on top.
• Check railings and posts for looseness — this is a safety item, not just cosmetic, and freeze-thaw cycling in the foothills can work fasteners loose over a season.

Foundation and Drainage

• Confirm the ground slopes away from the foundation on all sides — flat or reverse-graded soil holds water against the house through the wet season.
• Check crawlspace vents and vapor barrier condition — humid, wooded sites like much of Alger need working crawlspace ventilation to avoid trapped moisture.
• Look for standing water or erosion near the foundation a day or two after a heavy rain — that's a better test than checking right after the storm passes.

What to Do If an Item Fails

Not every failed item is an emergency. Start by photographing the issue and noting roughly how long it's been visible, since that helps a contractor or your insurer understand the timeline. For anything actively letting water into the structure — a leaking flashing detail, a soft spot on the roof deck, a gap around a window — treat it as higher priority than cosmetic issues like faded paint or minor moss on a walkway. Moss on a roof can often be addressed with a gentle, non-pressure-washed treatment and improved airflow rather than an immediate roof replacement, but don't ignore it indefinitely, since moss roots can lift shingle edges over several seasons. Clogged gutters and misdirected downspouts are usually a same-day DIY fix if you're comfortable on a ladder; if you're not, that's a reasonable, low-cost service call rather than a full inspection. Soft deck boards or a loose railing should be treated as a safety issue and taken out of service (roped off or simply not used) until repaired, not just monitored. When in doubt about whether something is structural, it's worth a second look before winter rather than after.

When to Call a Professional

Bring in a licensed contractor when an issue involves the roof deck itself rather than just the surface layer, when you find water stains inside the attic or on interior ceilings, when a deck ledger board shows rot or the flashing behind it looks compromised, or when more than one system is affected at once — for example, a roof leak that's also caused siding or trim damage below it. Anything at height, on a steep pitch, or near power lines is not a DIY inspection task. It's also worth calling a professional before any window or siding replacement project so the work is scoped to meet Washington State Energy Code requirements the first time, rather than needing correction later. Alpine Exteriors serves Alger along with the rest of Skagit, Island, and Whatcom counties — including Mount Vernon, Anacortes, Burlington, Sedro-Woolley, La Conner, Stanwood, Camano Island, and Bellingham — and can do a full roof, gutter, window, and siding assessment if you'd rather not climb up there yourself.

FAQ

How often should I inspect my home's exterior if I live in Alger or nearby Skagit County?

Twice a year is a reasonable baseline for most homes here — once in early fall before the heavy rains set in, and once in spring to assess how the roof, gutters, and siding held up over the wet season. If your lot has heavy tree cover, checking gutters more often, such as after major windstorms, is worth the extra effort given how much needle and leaf debris accumulates.

My roof gets moss every year even though I've trimmed back the trees. Is that normal?

It can be, especially on north-facing slopes that stay shaded most of the day regardless of nearby tree trimming, since the sun angle in this part of Washington is low for much of the year. Moss regrowth is common in shaded, wooded settings like Alger and doesn't necessarily mean anything is wrong with the roof — but it should still be monitored and treated periodically so it doesn't work its way under shingle edges over time.

Is salt air something I need to worry about for a home in Alger?

Less so than for waterfront properties on Camano Island, Whidbey Island, or coastal Anacortes. Alger is set back from open saltwater and shielded somewhat by the Chuckanut foothills and tree cover, so corrosion from salt-laden air is a smaller factor here than the region's general rainfall and shade-driven moisture issues. It's still reasonable to use quality fasteners and hardware, just not something that needs to drive every material decision the way it would closer to the open water.

If I replace my windows, do I have to meet the Washington State Energy Code?

Yes — replacement windows and doors, and most exterior envelope work, need to meet the performance requirements set out in the Washington State Energy Code for our climate zone. A licensed contractor can walk you through what that means for U-factor and installation details on your specific home so the permit and inspection process goes smoothly.

Ready for a Second Set of Eyes?

A checklist catches a lot, but some issues — hairline roof deck rot, a flashing detail that looks fine from the ground, an early-stage window seal failure — are easier to spot in person. Alpine Exteriors (WA contractor license ALPINI751OW) works on roofing, windows, decks, and gutters throughout Skagit, Island, and Whatcom counties, including Alger, Mount Vernon, Anacortes, Burlington, Sedro-Woolley, La Conner, Stanwood, Camano Island, and Bellingham. If anything on this list turned up a maybe rather than a clear pass, reach out to Alpine Exteriors for a straightforward exterior assessment before the next wet season sets in.