The Spring Exterior Cleaning Checklist for Charlotte Homeowners

Published March 17, 2026  •  Soap & the City

Spring in Charlotte doesn't arrive gently. Pollen hits in March, the rains come hard in April, and by May you're already in the heat. There's a short window — usually six to eight weeks — between the last cold snap and the point where summer humidity has baked everything into a harder-to-clean state.

The homes that look best from June through September are the ones where the owner did something in March or April, not July. This checklist walks through every exterior surface worth your attention, what to look for on each one, and the right sequence so you're not redoing work you already did.

This is not a sales pitch. Some of this you can handle yourself. Some of it isn't worth doing yourself. We'll tell you which is which.

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Start at the top: roof and gutters

The roof is the place most homeowners don't look until something goes wrong. A Carolina winter — even a mild one — creates the right conditions for algae and moss growth, especially on north-facing slopes that don't get much direct sun. What you're looking for:

• Black streaks on shingles — that's Gloeocapsa magma, a cyanobacteria commonly called roof algae. It spreads from spores and feeds on the limestone filler in asphalt shingles. Left untreated, it shortens shingle life and darkens visibly over the summer.
• Green or fuzzy patches — that's moss, usually on shaded areas. Moss retains moisture against the shingle surface, which accelerates deterioration and can lift shingle edges over time.
• Lichen — the grey-green crusty growth that's harder to remove than either algae or moss. If you're seeing lichen, the biological growth has been present for more than one season.

You don't need to be on the roof to do this inspection. Binoculars or a drone view works fine. What you're ruling out is active biological growth before it spreads further into summer.

Gutters are connected to this step. Leaves, seed pods, and debris accumulate over fall and winter. Gutters full of decomposing organic material are the ideal environment for moss and mold growth at the roofline — and when the April rains hit, clogged gutters overflow rather than channel water away. That overflow saturates the fascia board, runs down the siding, and pools at the foundation. Clean gutters before spring rains, not after.

While you're at it: check the downspouts. A downspout that's draining water two feet from the foundation is doing work. One that's pointing at a window well or depositing water at the base of your siding is causing slow damage every rain.

House siding and exterior surfaces

The north side of your house and any shaded walls didn't see much direct sun all winter. That's where you'll find the most biological growth: mold and mildew streaks, algae patches, and the chalky-white residue that shows up on certain siding types when moisture has been cycling through it.

What you're looking for varies by surface:

• Vinyl siding — check for dark vertical streaking (usually mildew) and the greenish film in lower sections. Vinyl doesn't rot, but mildew grows on the dirt and organic material sitting on its surface. It's also worth checking under eaves and soffits — those are protected from rain, so dirt accumulates without the natural rinse cycle.
• Brick — look for efflorescence (white mineral deposits leaching through the mortar) and any dark biological growth in the mortar joints. Brick is porous and holds moisture longer than vinyl, which makes it a better surface for algae to establish on.
• Stucco and EIFS — particularly susceptible to algae and mold in the Charlotte climate. The textured surface catches everything: pollen, dirt, biological growth. Stucco needs careful cleaning — pressure washing at the wrong distance damages the surface, so soft washing (low-pressure chemical application) is the standard approach.
• Painted wood siding — look for peeling paint at the bottom edges and mildew growth under windowsills and in corners. Spring is the right time to clean before any repainting — cleaning over biological growth means the paint won't adhere properly.

A house wash covers all of this in one pass. It's not just cosmetic — you're removing the mold and algae before the summer heat and humidity accelerates their growth cycle.

Windows

Windows get skipped more than anything else on this list, usually because people rationalize that rain cleans them. It doesn't. Rain deposits mineral deposits from hard water on the glass surface, and in Charlotte the pollen film starts accumulating by mid-March. By April you can see the yellow cast on horizontal surfaces — and your windows are horizontal enough to catch it.

What winter and early spring leave on windows:

• Hard water mineral deposits — white or hazy spots from rain and sprinkler overspray. These etch into glass if left long enough and become more difficult to remove over time.
• Pollen film — the yellow-green layer that starts in March. It's sticky, especially once moisture has cycled through it a few times. Wiping it with a dry cloth just smears it.
• Oxidation and frame residue — aluminum frames oxidize over time, and that oxidation runs down onto the glass. Vinyl frames track dirt into the corners. Both need attention that a simple wipe-down doesn't provide.

Clean inside and outside in spring. You'll notice the difference on the first sunny day after — natural light through genuinely clean glass is noticeably different from light through glass with a seasonal film on it. It's also worth cleaning before pollen season peaks, not after, because post-peak cleaning means removing multiple pollen layers instead of one.

Driveways and concrete

Concrete takes abuse over winter that isn't obvious until you look closely. Freeze-thaw cycles do real work on existing cracks — water infiltrates a hairline crack, freezes, expands, and makes it wider. If you had any ice and used ice melt products, those leave behind white chalky residue that looks worse once the surrounding concrete is clean.

The right spring sequence for concrete:

1. Pressure wash first. Cleaning before crack repair and sealing is mandatory — you can't get good adhesion on dirty or organically contaminated concrete. The cleaning reveals the full extent of cracking and staining that's been there but hidden under a layer of winter grime.
2. Assess the cracks. Hairline cracks (less than 1/8 inch) are typically cosmetic and stable. Wider cracks, especially ones with vertical displacement (one edge higher than the other), are structural and worth having someone look at.
3. Deal with oil stains. Oil is more visible after cleaning because the surrounding concrete brightens while the stained areas stay dark. Pre-treating with a degreaser before the pressure wash gives the best results — pressure alone doesn't emulsify oil.
4. Then seal, if you're sealing. Concrete sealer applied in spring protects through the summer heat and the salt from any next-winter ice events. Sealing over dirty or damp concrete is a waste of product.

If you used ice melt on the driveway this winter, read our guide on cleaning concrete after ice melt — there are some specific steps for neutralizing the chemical residue before sealing.

Pavers, patios, and stone

Pavers have specific spring issues that concrete doesn't. The biggest one is efflorescence: the white powdery mineral deposits that appear on paver surfaces and in joints after wet weather. It's calcium carbonate leaching to the surface as water moves through the paver material. It's not structural damage, but it makes a well-laid patio look neglected.

Other things to look for on pavers and stone patios in spring:

• Weed growth in joints — by April in Charlotte, weeds are germinating in paver joints. What starts as a few small sprouts becomes a dense weed network by June if you don't address it in spring. Pressure washing clears the existing growth; re-sanding joints with polymeric sand afterward reduces the window for re-establishment.
• Algae and mold on shaded patios — any patio that's under a tree canopy or covered structure will accumulate green biological film over winter. It's slippery and looks bad. This is a pressure washing job, with the right nozzle distance to avoid dislodging joint sand.
• Displaced or sunken pavers — frost heave can shift individual pavers out of plane. Walk the surface and feel for any rocking or soft spots. Resetting pavers is a separate job from cleaning, but spring is the right time to identify what needs attention.
• Joint sand erosion — check whether joint sand has washed out in heavy rain areas. Open joints invite weeds and allow individual pavers to shift. Re-sanding (polymeric preferred) after cleaning is standard maintenance.

Natural stone patios — bluestone, travertine, flagstone — need the same attention but are more sensitive to pressure. The cleaning approach matters more on stone than on concrete pavers. Too much pressure on porous stone strips the surface and opens it up to faster reabsorption of water and biological growth.

Decks and wood surfaces

Wood decks accumulate mold and mildew over the winter, and the graying that happens on untreated or weathered wood is both cosmetic and the beginning of surface deterioration. Spring is the critical window for deck maintenance because it's the last chance to clean before applying any stain or sealant — and you cannot seal over biological growth.

What a spring deck inspection looks like:

• Mold and mildew — look in the corner joints between boards, along the ledger board where the deck meets the house, and under furniture where moisture stays trapped. Black or green discoloration is biological, not just weathering.
• Soft spots — press a screwdriver into the wood at any area that looks darker or more weathered than surrounding boards. Significant penetration means moisture damage has compromised the wood fiber. Soft spots on decking boards mean replacement; soft spots on posts or beams are a structural issue.
• Graying and surface check — UV exposure causes wood fibers to oxidize and gray. This is surface damage that a good cleaning and brightening treatment reverses. If the gray is accompanied by raised grain and splintering, the wood needs cleaning before any coating is applied.
• Hardware corrosion — screws, joist hangers, ledger bolts. Any surface rust or significant corrosion on structural hardware is worth replacing before it progresses.

Composite decks still need spring cleaning. The common misconception is that composite is maintenance-free. It isn't — it's low maintenance. Mold and mildew grow on the organic material that collects on composite surfaces, and composite is more susceptible to staining from leaves and other organic debris than wood is. Clean it in spring and you won't have the dark staining that's harder to address in summer.

The right order matters

Every item on this list interacts with the others, which is why sequence matters as much as the cleaning itself. The rule is simple: always work top to bottom.

Here's what goes wrong when you ignore the sequence:

• You pressure wash the driveway first. Then you clean the gutters, and gutter debris falls on the freshly cleaned concrete. Now you're cleaning the driveway again.
• You wash the siding. Then someone cleans the gutters and debris runs down the house. Now there's a streak on the siding you just cleaned.
• You clean the deck and patio. Then the house washing runoff settles on the surfaces below. Same problem.

The right sequence for a full spring exterior clean:

1. Roof inspection (and treatment if needed)
2. Gutter cleaning and downspout check
3. House washing — siding, eaves, trim, soffits
4. Window cleaning
5. Deck and patio cleaning
6. Driveway and concrete pressure washing
7. Paver joint inspection and re-sanding as needed

Windows can move around in that sequence depending on whether you're doing them yourself or having them done separately. The non-negotiables are: gutters after roof, siding after gutters, ground-level surfaces last.

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What you can do yourself vs. what's worth hiring out

Honest answer, because this is the question we get most often.

Gutters — DIY if you're comfortable on a ladder. There's no technical skill here, just physical access. If your house is one story and you own a ladder, this is a reasonable Saturday morning job. Two stories with long gutter runs is where it starts to become a time-and-hassle calculation rather than a skill question. The hidden cost of DIY gutters is usually the disposal and cleanup, not the actual cleaning.

House washing — technically DIY, but the risk is real. Renting a pressure washer and running it across vinyl siding is something most people can do without destroying anything. The problems show up with pressure settings on softer materials (stucco, painted wood, EIFS), nozzle distance on corners and window frames, and the mix and application of cleaning chemicals for biological growth. A DIY house wash often removes dirt but leaves algae and mildew because the pressure alone doesn't kill biological growth — the chemistry does. If you're on vinyl with no shaded walls, DIY is reasonable. If you have stucco, brick, or significant mold, hire it out.

Roof cleaning — hire it out. Two reasons. First, safety: a wet roof is a genuinely dangerous surface, and most roof injuries happen to people who were comfortable on roofs before that one time. Second, damage risk: pressure washing shingles strips the granule surface that protects against UV and water. Roof cleaning is a soft wash job — low-pressure chemical application — and doing it wrong means either ineffective cleaning or shingle damage. The cost of a professional roof treatment is a fraction of the cost of premature shingle replacement.

Driveway pressure washing — DIY is workable with the right equipment. You need a real pressure washer (at least 3,000 PSI, 4 GPM), a surface cleaner attachment to avoid the striping that a wand-only approach leaves, and some patience on the edges. The biggest DIY mistake on concrete is using too narrow a nozzle at too close a range, which leaves visible lines. If you're renting equipment, factor in the time cost — a good surface cleaner attachment often isn't included in standard rentals.

Pavers — DIY is risky if you don't know what you're doing. Too much pressure or too close a distance dislodges joint sand and can etch softer paver surfaces. Once joint sand is gone, weeds establish faster and individual pavers start shifting. Re-sanding after a DIY job that was too aggressive is an annoying and avoidable extra step. Get a quote first — paver cleaning is one of the services where professional results are noticeably different from DIY results.

Windows — DIY is fine for accessible windows. A telescoping water-fed pole brush with purified water gives professional-quality results on windows you can reach from the ground. Second-story windows that require a ladder are the point where professional window cleaning becomes worth the cost — not because the skill is hard, but because the setup time per window is significant.

General heuristic: if you're renting equipment or getting on a ladder, get a quote first. Rental costs add up fast, and a quote is free. The math often surprises people.