Home Exterior Inspection Checklist for Lake Stevens, WA Homeowners

Updated August 2026 · Alpine Exteriors · WA contractor license ALPINI751OW

Why This Checklist Matters in Lake Stevens and Snohomish County

Lake Stevens sits back from Puget Sound, tucked against the first rise of the Cascade foothills, and that location shapes what actually wears out a house here. The defining stress isn't a single dramatic event — it's the long, wet stretch that runs from October through April, when the region gets weeks of steady, low-intensity rain broken up by the occasional heavier system. Most Lake Stevens lots also carry a fair amount of mature fir, cedar, and maple cover, which keeps roofs, siding, and decks shaded and damp for long stretches even between storms. That combination of moisture and shade is exactly what moss, algae, and slow rot need to get established, and once they do, they work quietly for months before a homeowner notices a stain, a soft spot, or a leak.

A few times most winters, a Pacific frontal system or a stronger windstorm pushes through Snohomish County. On its own, wind rarely tears a well-maintained roof apart, but on ground that's already saturated from weeks of rain, it topples trees and heavy limbs — and around Lake Stevens, with its wooded lots, that's often what actually damages a roof, fence, or gutter run rather than the wind alone. Because Lake Stevens sits at a bit more elevation and closer to the foothills than the immediate Puget Sound shoreline, it also picks up snow and ice a little more often than Everett or the waterfront communities — not every winter, but enough that gutters, flashing, and exterior fasteners see freeze-thaw cycling that flatter, lower-elevation homes don't. None of these conditions are severe individually. What matters is that they're cumulative and mostly invisible from the ground, which is why a short walk-around inspection twice a year — once heading into fall storm season and once coming out of winter — catches small problems while they're still cheap to fix.

The Checklist

Work through each area methodically, starting from the roofline and moving down. You don't need a ladder for most of this — binoculars from the ground and a walk around the perimeter cover the majority of items.

Roof

• Moss or dark streaking on shaded slopes — moss holds moisture against shingles and can lift tabs as it grows, which is the single most common early failure point on tree-covered Lake Stevens lots.
• Lifted, cracked, or missing shingle tabs — often caused by wind-driven debris or age, and an open spot is where water finds its way under the roofing layer.
• Flashing around chimneys, vents, and skylights — these transitions are the most common leak points on an otherwise sound roof, especially after a hard windstorm.
• Needle and leaf buildup in valleys — debris holds water against the roof deck and accelerates rot in exactly the spots that are hardest to see from the ground.
• Sagging or uneven roof lines — can indicate deck rot or a structural issue underneath, not just a cosmetic problem.

Gutters and Downspouts

• Clogged gutters — needle and leaf litter from surrounding trees fills gutters fast here, and a clogged run overflows straight down the siding instead of doing its job.
• Gutters pulling away from the fascia — usually means the fasteners have failed under the weight of standing water and debris, and it will get worse, not better, on its own.
• Downspouts that dump water near the foundation — without an extension carrying water several feet away, you're steadily saturating the soil right next to your crawlspace or slab.
• Ice damming after a cold snap — if gutters and eaves ice up during one of Lake Stevens's occasional freezes, water can back up under the shingles as it thaws and refreezes.

Siding and Trim

• Peeling paint or discolored panels — usually the first visible sign that moisture is getting behind the surface, especially on north-facing walls that stay shaded most of the day.
• Gaps or cracked caulking at trim, corners, and penetrations — small gaps let wind-driven rain track behind the siding where it won't dry out.
• Soft or spongy spots when pressed by hand — a reliable sign of rot underneath, most common near ground level, deck ledgers, and window sills.
• Woodpecker or insect damage — more common on wooded Lake Stevens lots than in open subdivisions, and the holes they leave are an easy entry point for water.

Windows and Doors

• Fogging or moisture between double-pane glass — means the seal has failed and the insulating gas has escaped; it's a comfort and efficiency issue, not a safety one, but it won't fix itself.
• Drafts around frames — hold a hand near the edge on a windy day; a steady draft usually means the weatherstripping or exterior caulk has given out.
• Difficulty opening, closing, or latching — can mean the frame has swollen from moisture intrusion or the house has settled slightly.
• Visible gaps in exterior caulking around frames — a common, low-cost fix that prevents a much larger moisture problem later.

Decks and Outdoor Structures

• Ledger board attachment to the house — this is the single most safety-critical point on any deck; look for gaps, rust streaking, or separation where the ledger meets the wall.
• Rusted or popped fasteners — years of damp weather corrode standard fasteners faster than most homeowners expect, and a popped nail can mean the board underneath has already started to move.
• Moss or algae film on deck boards — beyond looking bad, it makes the surface genuinely slippery in wet weather, which is most of the year here.
• Wobble or sinking at support posts — can mean a footing has shifted or rotted, and it's worth checking before the deck sees heavy winter use.

Foundation, Grading, and Drainage

• Soil sloping toward the house instead of away — even a slight reverse grade channels roof and yard runoff straight into your crawlspace or foundation over a wet winter.
• Standing water near the foundation after rain — a sign drainage isn't keeping up, which matters more here than in drier climates simply because of how many wet weeks the ground absorbs each year.
• Blocked or missing crawlspace vents — poor airflow underneath the house traps moisture and can lead to mold or wood rot in floor framing.
• Visible cracks in the foundation — hairline cracks are common and often cosmetic, but anything wide enough to fit a coin, or that's growing, deserves a closer look.

What to Do if an Item Fails

Not everything on this list means calling a contractor. A few clogged gutters, a small gap in exterior caulk, or a light coat of moss on a deck are reasonable weekend projects: clear debris by hand or with a hose (not a pressure washer, which can drive water under shingles or siding and cause more damage than it prevents), re-caulk small gaps with an exterior-rated sealant, and treat moss with a gentle, low-pressure rinse or a zinc or copper control strip along the ridge rather than scraping or power-washing it off, which can strip granules and shorten a roof's life.

Other items are diagnostic rather than fixable on the spot — a soft spot in siding, a sagging roofline, or fogged window glass tells you something is wrong, but not exactly how bad it is or what it will cost to correct until someone opens it up or gets a closer look. Resist the urge to guess at severity from the ground. A stain that looks minor can mean anything from a surface issue to several months of hidden water damage in the wall or roof framing behind it, and the only way to know for certain is a closer inspection.

A general rule of thumb: if fixing it means working at height, cutting into a wall or roof assembly, or touching anything structural — a ledger board, a support post, roof decking — treat it as a professional job rather than a DIY one. The cost of getting it wrong, whether that's a fall, a botched repair that traps moisture, or work that voids a manufacturer warranty, is usually far higher than the cost of a proper repair done once.

When to Call a Professional

Some findings are worth a phone call rather than a trip to the hardware store:

• Active leaks, water stains on ceilings, or damp spots in the attic or crawlspace
• Multiple missing or damaged shingles, or any exposed roof decking
• Soft, spongy, or visibly separated decking at a ledger board
• Siding or trim that's soft or crumbling over a wide area, not just one spot
• Window or door frames with visible rot, not just failed caulking
• Foundation cracks that are wide, growing, or paired with a sloping floor
• Anything that requires ladder work above a single story, or working near power lines

This is also where it's worth being honest about limits: a homeowner with the right tools can safely handle most of the small-fix items above, but roof, deck-structure, and foundation issues carry real risk if diagnosed or repaired incorrectly. Alpine Exteriors, a licensed Washington contractor (Lic. ALPINI751OW) working in Skagit, Island, and Whatcom counties as well as neighboring Snohomish County communities including Lake Stevens, Stanwood, and Camano Island, handles roofing, siding, window, deck, and gutter inspections and repairs across this kind of terrain regularly — the same combination of tree cover, seasonal rain, and occasional wind and ice that shapes this checklist. A professional inspection typically costs less than the small-fix items you'd otherwise buy piecemeal to chase a problem, and it comes with a clearer picture of what, if anything, needs to happen next.

FAQ: Home Exterior Inspections in Lake Stevens

How often should I do a full exterior inspection in Lake Stevens?

Twice a year covers most homes here — once in early fall before the wet season sets in, so gutters and roof penetrations are clear before the heavy rain starts, and once in early spring to check for anything winter wind, rain, or an occasional ice event left behind. Homes with heavy tree cover or a north-facing roof slope that stays shaded most of the day may benefit from an extra gutter check in late fall, since needle litter builds up fast in a wooded yard.

Does moss on my roof actually cause damage, or is it just a cosmetic problem?

It's more than cosmetic, though it's rarely an emergency. Moss holds moisture against the shingle surface far longer than the shingle would otherwise stay wet, and as it grows it can physically lift shingle tabs enough for wind-driven rain to get underneath. Left alone for several seasons on a shaded roof, that moisture retention shortens the life of the roofing material. It's not usually urgent, but it's worth treating before it spreads across a whole slope.

My homeowners insurance asked for a roof or exterior inspection — is that the same as this checklist?

It's related but not identical. This checklist is meant to help you spot problems early on your own; an insurance-requested inspection is usually a formal report from a licensed contractor or inspector documenting the current condition of the roof and exterior for underwriting purposes. If your insurer has asked for documentation, it's worth having a licensed contractor complete that inspection directly rather than relying on a self-check, since the report needs to meet whatever format the insurer expects.

Do older Lake Stevens homes need any code upgrades when replacing windows, siding, or roofing?

Often, yes, at least for windows and insulation. The Washington State Energy Code sets minimum performance requirements for replacement windows and other building envelope components, and simply swapping an old window for a similarly cheap one may not meet current requirements depending on the scope of the project and how your local jurisdiction applies the code to replacements versus new construction. It's worth confirming code requirements with your contractor and local building department before ordering materials, rather than after.

Schedule a Professional Exterior Inspection

A twice-a-year walk-around catches most of what a Lake Stevens home is likely to throw at you, but some findings deserve a second, trained set of eyes — especially anything involving the roof deck, a deck's structural connections, or window and door assemblies with hidden rot. Alpine Exteriors is a licensed Washington contractor (ALPINI751OW) serving Skagit, Island, and Whatcom counties along with nearby Snohomish County communities such as Lake Stevens, Stanwood, and Camano Island, with roofing, siding, window, deck, and gutter work suited to the wet, tree-shaded, occasionally windy and icy conditions typical of this part of Washington. If anything on this checklist raised a question you can't answer from the ground, reach out to Alpine Exteriors for a closer look before the next storm season settles in.