Home Exterior Inspection Checklist for Stanwood, Washington Homeowners

Updated August 2026 · Alpine Exteriors · WA contractor license ALPINI751OW

Why This Checklist Matters in the Stanwood Area

Stanwood sits where the Stillaguamish valley opens onto Port Susan, right at the edge of the broader Skagit flats, which means wind coming off the open water and farmland rarely has much to slow it down before it reaches a rooftop. On a blustery fall or winter day, that unobstructed path is part of why loose shingles, lifted flashing, and gutters pulled away from the fascia show up on homes in this stretch of Snohomish County more than they do a few miles inland. Add a wet season that regularly runs from October into May, and small gaps in the exterior envelope that would be a minor nuisance somewhere drier become a real route for water into wall cavities, crawlspaces, and roof decking.

Properties around Warm Beach, Kayak Point, and the more wooded lots closer to the Stillaguamish River tend to carry heavier tree cover, and shaded, north-facing roof slopes in that setting grow moss and algae far more readily than sun-exposed ones. Moss is not just a cosmetic problem, it holds water against the roofing material and works itself under shingle edges over time. Closer to Port Susan itself, salt-tinged air off the water speeds up corrosion on gutters, flashing, and exposed metal fasteners, which is a factor that homes further inland in Snohomish County simply do not deal with as much. Stanwood rarely sees the snow load that towns closer to the Cascade foothills get, but cold snaps still bring occasional ice and freezing rain, and that finds its way into any crack that has already started.

The Washington State Energy Code also shapes how the exterior envelope is expected to perform, not just how it looks. Window U-factor requirements, air sealing standards, and insulation targets for additions, re-sides, and replacement work are all written around keeping heat in and moisture out through a long, wet heating season, which is exactly what a well-maintained roof, siding system, and set of windows and doors are supposed to do anyway. A twice-yearly walk-around, once in early fall before the rains settle in and again in spring to see what winter did, is usually enough to catch most of these issues while they are still small, inexpensive repairs instead of interior damage.

The Home Exterior Inspection Checklist

The following checklist mirrors the way Alpine Exteriors approaches a full exterior walk-around, grouped by system so you can work through it a section at a time.

Roof

• Look for moss or algae growth on shaded or north-facing slopes — moss holds moisture against the roof surface and lifts shingle edges, letting water track underneath.
• Check for missing, cracked, curling, or lifted shingles — any gap in the roof covering gives wind-driven rain a direct route to the decking below.
• Inspect flashing around chimneys, vents, skylights, and roof-to-wall transitions — flashing failures are the single most common cause of hidden roof leaks.
• Check gutters and the ground below downspouts for heavy granule buildup — significant granule loss usually means the shingles are nearing the end of their service life.
• Look for sagging ridgelines or soft spots if you can safely view the attic — sustained exposure through a small leak can rot sheathing long before it shows on the ceiling.

Gutters and Downspouts

• Clear needles, leaves, and moss out of gutters and valleys each fall — a clogged gutter overflows straight down the siding and toward the foundation.
• Check that gutters are pitched correctly and hangers are still tight — wind and the weight of standing debris can pull loose gutters away from the fascia.
• Confirm downspouts carry water at least several feet from the foundation — this keeps roof runoff from saturating soil next to a crawlspace or slab.
• Look for rust, pitting, or seam separation on metal gutters, especially on properties nearer Port Susan — salt-tinged coastal air speeds up corrosion on exposed metal.

Siding and Trim

• Check for cracked, warped, or separated siding panels or boards — any gap behind the cladding gives wind-driven rain a way to reach the sheathing.
• Inspect caulking and trim joints around windows, doors, and other penetrations — failed sealant is a direct, easy-to-miss path for water intrusion.
• Look for soft or discolored wood trim, especially at corners and near ground level — softness means moisture has already started breaking the wood down.
• Note persistent moss or dark algae staining on shaded walls — constant damp shade breaks down paint and siding finishes faster than on sun-exposed walls.

Windows and Doors

• Feel for drafts and check weatherstripping condition — worn seals raise heating costs and work against the performance targets built into the Washington State Energy Code.
• Look for fogging or condensation trapped between panes on double-glazed windows — a foggy seal means the insulating gas has escaped and the unit needs replacing, not just cleaning.
• Check window sills and door thresholds for soft or discolored wood — sills collect standing water during long rain events and rot from the bottom up.
• Confirm exterior doors latch and seal tightly all the way around — gaps at the door are one of the biggest sources of both heat loss and rain intrusion.

Decks and Outdoor Structures

• Check the ledger board where the deck attaches to the house — a failing ledger connection is a structural safety issue, not a cosmetic one.
• Look for soft, spongy, or splitting deck boards, particularly in shaded corners — months of standing winter dampness accelerate wood decay on horizontal surfaces.
• Test railings and posts for looseness — wood shrinks and swells through repeated wet-dry cycles, which gradually works fasteners loose.
• Check metal joist hangers, bolts, and screws for rust — combined rain and salt air corrode uncoated hardware faster than in drier inland areas.

Foundation, Grading, and Drainage

• Confirm the ground slopes away from the foundation on all sides — flat or reverse grading pools winter rain right against the crawlspace or foundation walls.
• Check crawlspace vents for blockage and look for foundation cracks — blocked vents trap moisture inside and encourage wood rot and mold growth.
• Check the crawlspace itself for standing water, damp insulation, or a musty smell — persistent crawlspace moisture is one of the most common hidden problems in homes throughout this rainy part of Snohomish County.

What to Do If an Item on the Checklist Fails

Not every failed item needs an emergency call. Clearing a clogged gutter, re-caulking a gap around a window trim board, or scrubbing light moss off a walkway are reasonable weekend projects for most homeowners, and doing them promptly costs little more than an afternoon and some basic materials. The goal with those small jobs is simply not to let them sit through an entire wet season, since a gap that starts as a cosmetic issue in September is often a soft spot in the sheathing by February.

For anything more involved, a soft spot in roof decking, a leaning or loose deck ledger, siding that has visibly separated from the wall, or a crawlspace with standing water, the safest first step is to stop water from getting worse while you arrange a proper repair. That might mean a temporary tarp over a damaged roof section, redirecting a downspout away from a wet foundation corner, or simply staying off a deck until the ledger connection has been checked. Take photos and note when you first noticed the problem; that record is useful both for a contractor's assessment and for any insurance conversation if the damage turns out to be more extensive than it looked from the ground. Because Stanwood's wet season runs long, it is worth scheduling repairs before the next heavy rain rather than waiting for a dry stretch that may not come for months.

When to Call a Professional

Some items on this checklist are safe to handle yourself with a ladder, gloves, and basic tools. Others involve height, structural connections, or systems where a mistake causes more damage than it prevents, and those are worth handing to someone who does this work daily. Call a professional for any roof work beyond clearing debris from the ground: walking a wet, mossy roof is genuinely dangerous, and a misdiagnosed leak often means tearing out more roofing than necessary to find the actual entry point. The same goes for a deck ledger board that feels loose or shows rot, since that connection carries the structural load of the entire deck and is not a fix to guess at.

Persistent crawlspace moisture, a musty smell that does not clear up, or visible mold on framing also call for a professional evaluation, since the underlying cause is often a combination of grading, ventilation, and drainage issues that need to be diagnosed together rather than treated one symptom at a time. Window or siding replacement tied to Washington State Energy Code compliance is another area where professional input matters, since the code sets performance requirements that DIY replacement work can miss even when the finished product looks fine. Alpine Exteriors handles roofing, siding, window, gutter, and deck work across Stanwood and the rest of Skagit, Island, and Whatcom counties, and can walk through a full exterior inspection with you and lay out what is cosmetic, what is worth watching, and what needs to be addressed before the next rainy season. One honest note on timing: fall is peak demand for exterior work across this whole region, so a professional inspection booked in September may not turn into a repair crew on-site until several weeks later, so earlier is better than later.

FAQ: Stanwood Home Exterior Inspections

How often should Stanwood homeowners inspect their home's exterior?

Twice a year covers most homes in this area, once in early fall before the rainy season sets in so gutters and flashing are ready for the heaviest rain, and again in spring to check what the winter's wind and rain actually did. Homes on wooded lots with heavy moss growth, or on waterfront properties exposed to salt air near Port Susan, often benefit from an added mid-winter gutter check as well.

Why does moss keep coming back on my roof even after cleaning it off?

Moss returns because the underlying conditions that grow it, shade from trees, a north-facing slope, and near-constant winter moisture, do not go away just because the roof was cleaned once. Regular light cleaning combined with keeping overhanging branches trimmed back slows regrowth considerably, but on a heavily shaded roof it is a recurring maintenance item rather than a one-time fix.

Is a loose deck ledger board a serious problem or a minor fix?

It should always be treated as serious until a professional says otherwise. The ledger board carries the structural connection between the deck and the house, and a failing connection can lead to a sudden deck collapse rather than a gradual, visible warning. Even if the rest of the deck looks solid, a loose or rotted ledger is worth an in-person evaluation before the deck is used again.

Do window or siding replacements have to meet the Washington State Energy Code?

Yes, replacement windows, doors, and siding work tied to a permitted project generally need to meet the performance requirements set out in the Washington State Energy Code, which covers factors like window U-factor and air sealing. Even repairs that do not trigger a permit are worth matching to code-level performance where practical, since it directly affects heating costs through a long wet season.

Schedule a Home Exterior Inspection with Alpine Exteriors

Walking your own roofline, gutters, siding, windows, and deck once or twice a year catches most problems while they are still small. When something on this checklist turns up wear you are not sure how to judge, a soft ridge line, a loose deck connection, or a window that will not stop fogging, Alpine Exteriors, a Washington-licensed contractor (license ALPINI751OW) serving Stanwood along with the rest of Skagit, Island, and Whatcom counties, can take a closer look and give you a straightforward assessment of what needs attention now versus what can wait. Reach out to schedule an inspection before the next wet season settles in.