Home Exterior Inspection Checklist for Burlington, Skagit County Homeowners

Updated August 2026 · Alpine Exteriors · WA contractor license ALPINI751OW

Alpine Exteriors roofing, siding and window project in Skagit County, Washington

A once- or twice-a-year walk around your home takes less than an hour and can save you thousands of dollars in water damage, wood rot, and premature replacement costs. This checklist is written specifically for homes in Burlington and the surrounding Skagit Valley, where the exterior of a house faces a very different set of stresses than a home in a drier or hotter climate would. Use it as a starting point, not a substitute for a hands-on inspection when something looks off.

Why This Checklist Matters in This Region

Burlington sits in the Skagit River floodplain, surrounded by open farmland to the west and the Cascade foothills to the east, with Puget Sound and the San Juan Islands not far beyond. That geography creates a specific combination of exterior stresses. Rain here isn't dramatic, but it is relentless — the Skagit Valley sees a long, wet season from October through April where roofs, siding, and gutters stay damp for days or weeks at a time. That sustained moisture is what drives moss growth on north-facing and shaded roof slopes, especially on lots with mature fir and cedar trees, which are common throughout Burlington, Sedro-Woolley, and the wooded lots around Lake McMurray and Big Lake.

Wind is the other major factor. The flat, open farmland around Burlington and the Skagit flats funnels wind with very little to break it up, and gusts can catch roof edges, loose siding panels, and fence-mounted structures in ways that wouldn't happen in a more sheltered neighborhood. Homes closer to the water — La Conner, Camano Island, and the Anacortes/Whatcom coastline — deal with an added layer of salt-laden air off the Strait of Juan de Fuca and Puget Sound, which accelerates corrosion on fasteners, flashing, and metal gutters faster than inland homes experience. The Cascade foothills near Sedro-Woolley also see occasional snow and ice in a hard winter, which is rare but not unheard of, and can stress gutters and roof edges that are otherwise built for rain alone.

Finally, homes built or majorly renovated in Washington in the last couple of decades are governed by the Washington State Energy Code, which sets minimum requirements for window U-factor, air sealing, and insulation continuity. An inspection is a good time to notice where a home's envelope may be falling short of what current code would require — not because older construction is unsafe, but because gaps in that envelope are usually where moisture and energy loss first show up.

The Checklist

Roof

Moss or algae streaking, especially on north- and east-facing slopes — shaded, damp roof sections in the Skagit Valley hold moisture longer and are the first place moss takes hold, and moss roots can lift shingle edges over time.
Lifted, curling, or missing shingles — wind off the flats can work under a shingle edge that's already starting to loosen, so isolated damage tends to spread if it isn't addressed.
Granule buildup in gutters or at downspout outlets — heavy granule loss is a sign of a roof surface wearing thin, which matters more here given how many wet days the roof is exposed each year.
Cracked or displaced flashing around chimneys, vents, and skylights — flashing is the most common point of leak entry, and repeated freeze-thaw or wind-flex cycles can work small gaps loose over a season.
Sagging ridgelines or soft spots when viewed from the ground with binoculars — this can indicate sheathing that has absorbed water over time and is a sign to have someone get up on the roof directly.

Gutters and Downspouts

Standing water or sagging sections — with the volume of rain Burlington gets over a wet season, a gutter that isn't pitched correctly will overflow and drive water straight down the siding and foundation.
Debris buildup from fir needles and leaves — wooded lots throughout Skagit County shed heavily, and clogged gutters are one of the most common causes of fascia rot we see on inspections here.
Rust spots or corrosion on metal gutters and fasteners — this shows up faster on homes closer to the water, where salt air off the Strait or Puget Sound accelerates the process.
Downspouts that dump water near the foundation instead of directing it away — with our high water table in low-lying parts of the valley, poor drainage close to the house is a direct path to crawlspace moisture problems.
Loose or pulling-away gutter hangers — wind gusts across open farmland can flex a gutter run enough to work hangers loose over a few seasons.

Siding, Trim, and Fascia

Soft or spongy spots when pressed, especially near the bottom courses — wood and engineered wood siding that stays wet for extended periods is prone to rot starting at ground level or wherever splashback occurs.
Peeling or bubbling paint — this is often a sign that moisture is trapped behind the siding rather than just weathering on the surface, and it's worth investigating rather than just repainting over it.
Gaps or separation at seams, corners, and around windows — these are entry points for wind-driven rain, which is a real factor here even without anything close to storm-force wind events.
Discoloration or streaking below roof valleys — this usually means water is being funneled onto a section of wall faster than it can shed, often from an undersized or misdirected gutter section above.
Visible fastener corrosion on fiber-cement or metal siding — again more common on island and coastal properties, where salt air shortens the useful life of exposed fasteners.

Windows and Doors

Fogging or condensation between glass panes — this means the seal on a double- or triple-pane unit has failed, and the insulating gas has escaped, which matters for both moisture control and meeting the intent of the Washington State Energy Code's window performance standards.
Drafts felt around the frame — old or degraded weatherstripping is one of the most common and least expensive fixes, but it's also one of the biggest quiet contributors to a high winter heating bill in our climate.
Wood rot at sills or bottom corners — window sills catch and hold runoff from the wall above, and in a region with this much annual rainfall that exposure adds up over the years.
Cracked or failing caulk lines around frames — gaps here are a direct path for wind-driven rain, particularly on the exposed, wind-facing walls of homes out on the flats.
Doors that stick, drag, or don't seal at the threshold — this can indicate frame movement from moisture absorption in the surrounding wall assembly, not just a hardware issue.

Decks, Railings, and Outdoor Structures

Soft, spongy, or splintering deck boards — a deck that sits under tree cover or in a shaded yard stays damp far longer after our fall and winter rains, accelerating wood decay.
Rust or corrosion on structural fasteners and post bases — post bases sitting in damp soil or mulch are especially prone to this, and it's worth checking annually rather than waiting for a visible failure.
Loose railings or wobbly posts — this is a safety issue first and a moisture issue second; wind gusts can also add lateral stress to a railing that's already loosening at its base.
Ledger board separation from the house — this connection point takes on water runoff from the house wall above it and is one of the more serious structural items to catch early.
Green or black staining on boards and stairs — algae growth on a shaded deck is mostly cosmetic at first, but it also makes stairs slick, which becomes a real concern through our wet months.

What to Do if an Item Fails

Not every failed item on this list is an emergency, and treating them differently based on severity will save you money. Cosmetic issues — light moss on a roof, mild staining on deck boards, minor paint peeling on a sunny wall — are worth scheduling for cleaning or maintenance within the next few months, particularly before the wet season sets back in. Moss removal in particular is best done carefully; aggressive pressure washing can strip granules and shorten a roof's remaining life just as fast as the moss itself, so a soft-wash approach or manual removal is usually the safer call.

Items that involve active water intrusion — soft siding, rot at a window sill, a sagging gutter dumping water against the foundation — should be addressed on a shorter timeline, generally within a few weeks, because wood decay and moisture damage compound the longer they sit untreated in a climate this wet. Anything structural — a sagging roofline, a separating deck ledger, or a wobbly railing that could fail under load — should be treated as urgent regardless of season, since these carry a safety risk as well as a cost risk.

For minor items you're comfortable handling yourself, clearing debris from gutters, re-caulking a window frame, or spot-cleaning light algae from a deck are all reasonable DIY tasks with basic tools and normal caution around ladders. Where the checklist turns up something you can't fully assess from the ground, or where a repair involves the roof surface, structural framing, or anything at height, that's the point to bring in someone who does this work regularly.

When to Call a Professional

Call a licensed contractor rather than handling it yourself when an issue involves getting on the roof itself, when you find soft or rotted framing rather than just surface-level wear, when water intrusion has reached the interior of the home (stains on ceilings or interior walls), or when you're not sure whether an issue is cosmetic or structural. It's also worth having a professional look at anything tied to the building envelope if you're planning a remodel or addition, since that's the point where Washington State Energy Code requirements for insulation and window performance come into play and are easiest to address correctly the first time.

Alpine Exteriors works throughout Skagit, Island, and Whatcom counties — Burlington, Mount Vernon, Anacortes, Sedro-Woolley, La Conner, Stanwood, Camano Island, and Bellingham — on roofing, windows, decks, and gutters, and can walk a property with you to sort out what's genuinely urgent from what can be scheduled for later. Alpine Exteriors holds Washington contractor license ALPINI751OW.

FAQ

How often should I do a full exterior inspection in Burlington?

Twice a year is a reasonable baseline for most homes here — once in early fall before the wet season sets in, and once in spring to assess how the roof, siding, and gutters held up over the winter. Homes with heavy tree cover or older roofing may benefit from a quick mid-winter gutter check as well, since debris buildup during the wettest months is when overflow damage tends to happen.

Is moss on my roof actually a serious problem, or just cosmetic?

It starts as mostly cosmetic, but moss holds moisture directly against the shingle surface and can work under shingle tabs as it grows, which over a few seasons can lift edges and shorten the roof's service life. It's worth addressing before it becomes thick rather than waiting until it's visibly heavy, especially on the shaded, north-facing slopes that are common on wooded Skagit Valley lots.

Do I need to worry about wind damage in Burlington the way coastal areas might?

Burlington doesn't see hurricane-force wind, but the open farmland around town and out toward the Skagit flats does funnel steady gusts, and homes closer to the water on Camano Island or near Anacortes get additional exposure off the Strait. The practical concern is less about catastrophic wind damage and more about wind working at already-loose shingles, siding panels, or gutter hangers over time, so catching small issues early matters more here than building for a single big storm event.

What does the Washington State Energy Code have to do with an exterior inspection?

The energy code sets minimum performance standards for things like window U-factor and building envelope air sealing on new construction and major remodels. During an inspection, failed window seals, gaps in caulking, or drafty frames are often the visible signs that a home's envelope isn't performing the way current code would require of new work, which is useful information whether or not you're planning a renovation right now.

Ready to Have a Professional Take a Look?

If your walk-around turned up questions you can't answer from the ground, or you'd rather have an experienced eye go through the whole exterior at once, Alpine Exteriors serves homeowners across Skagit, Island, and Whatcom counties, including Burlington, Mount Vernon, Anacortes, Sedro-Woolley, La Conner, Stanwood, Camano Island, and Bellingham. Reach out to schedule a roof, gutter, siding, window, or deck assessment, and get a clear, honest picture of what needs attention now versus what can wait.

Want a straight answer for your home? Alpine Exteriors gives free on-site assessments across Mount Vernon, Anacortes, Burlington, Sedro-Woolley, La Conner, Stanwood, Camano Island and Bellingham. Call (855) 743-4649 or request an estimate.

Homeowner Guides for Skagit & Whatcom County

Home Exterior Inspection Checklist for Burlington, Skagit County Homeowners

Why This Checklist Matters in This Region

The Checklist