A Lowcountry summer is hard on a house. Months of heat, humidity, pop-up storms and tree debris leave their mark on siding, roofs, gutters and concrete. This fall exterior cleaning checklist walks you through what to clean, in what order and why autumn is the right time to do it in Charleston.
Key takeaways
- Fall is ideal for exterior cleaning in Charleston: milder temperatures, lower humidity and fewer afternoon storms.
- Start high and work low: roof, gutters, siding, then windows, decks and concrete.
- Clean gutters before the heavy leaf drop, then check them again in early winter.
- Use the end of hurricane season to inspect for storm damage and debris.
- A clean exterior before Thanksgiving makes holiday decorating and hosting much easier.
Why fall is the right time for exterior cleaning in Charleston
Spring gets all the attention for cleaning, but in the Lowcountry fall may be the better season. By October the worst of the heat is behind us, humidity starts to ease and the daily thunderstorm pattern fades. Cleaning solutions dwell and rinse more predictably, surfaces dry faster and you are working on a house that is no longer being re-coated every afternoon.
Fall cleaning also removes everything summer left behind before it settles in for the winter. Mildew that is allowed to sit through the cool, damp months only spreads further. Getting it off now means your home starts the new year clean instead of carrying a season of growth.
Your fall exterior cleaning checklist
Work from the top of the house down. That way dirt and runoff from higher surfaces do not land on areas you have already cleaned.
1. Roof: check for algae and debris
Look at your roof from the street and from the backyard. Dark streaks running down the shingles are usually Gloeocapsa magma, an algae that loves our humid summers. Note any debris piled in valleys or behind chimneys, especially pine straw and Spanish moss. If streaks are spreading, schedule a low-pressure soft wash. Shingle roofs should never be cleaned with high pressure. Our roof cleaning service uses a soft wash approach built for that reason.
2. Gutters: clear them before the leaves fall
This one is all about timing. Many Charleston trees drop leaves gradually from late fall into winter, and live oaks shed heavily in spring. Clearing gutters now removes the summer buildup of pollen, seed pods, shingle grit and storm debris so they are ready to handle what comes next.
- Scoop out debris and flush each run with water.
- Confirm downspouts drain freely and discharge away from the foundation.
- Look for sagging sections, loose hangers or seams that drip.
- Check the outside face of the gutters for black “tiger stripe” staining that can be cleaned off.
If you would rather keep your feet on the ground, professional gutter cleaning handles both the inside and the outside.
3. Siding: remove post-summer mildew
Walk around the house and pay special attention to the north side and any walls shaded by trees or shrubs. That is where green or black mildew shows up first, whether you live in a shaded neighborhood in Summerville or near the water in Mount Pleasant. Also look under eaves, around light fixtures and above sprinkler heads. Vinyl, Hardie board, stucco and painted wood all collect a film of mildew and dirt over the summer.
Most siding should be cleaned with a soft wash rather than high pressure. Low pressure protects paint, seals and seams and still kills the mildew at the root. A full house wash is the fastest way to bring every side of the home back at once.
4. Windows, screens and trim
Pollen residue from spring and early summer tends to bake onto window frames, sills and screens. Wipe or rinse screens, clean window tracks and wash the trim. Clean windows make a bigger difference to curb appeal than most people expect, especially once the days get shorter and you want all the natural light you can get.
5. Decks, fences and patios
Wood decks and fences take a beating from sun, rain and tree sap. Look for gray weathering, green growth on boards in the shade and slippery spots. Paver patios often grow weeds and moss in the joints. Fall is a good window to clean wood before winter dampness sets in, and it gives the surface time to dry well before you consider staining or sealing. See our deck, fence and patio cleaning page for details.
6. Driveways, walkways and sidewalks
Concrete collects tire marks, oil drips, mildew, rust and leaf stains, and inland homes often deal with red clay staining too. Clean concrete is easier to keep clean through the winter, and it is the first thing guests see when they pull up. Address oil spots before cleaning, and keep in mind that fresh leaf tannins come off much more easily than stains that have sat for months.
Hurricane season wrap-up
Hurricane season runs through November 30. Even if your area escaped a direct hit, tropical systems and strong storms can leave behind more than you notice. As the season winds down, take a walk around your property:
- Look for branches, leaves and debris on the roof and in gutters.
- Check siding for dirt and organic splatter driven by wind and rain.
- Inspect fences and decks for loose boards.
- Watch for any spots where water pooled against the foundation.
If you find real damage, such as missing shingles or broken fence sections, have a roofer or contractor handle the repairs first. Cleaning comes after repairs, not before.
Prep for the holidays
Thanksgiving and the December holidays bring guests, photos and decorations. A clean exterior makes all of that easier. Lights and garlands go up faster on clean gutters and trim, and they look better against bright siding. If you plan to host, a clean driveway, walkway and front porch set the tone before anyone walks through the door.
Book exterior cleaning a few weeks before you plan to decorate. That leaves time for surfaces to dry and keeps you from working around strings of lights.
What does fall exterior cleaning typically cost?
Costs depend on what is included, the size of your home, the number of stories and how much buildup there is. As a general industry range, a single service like a house wash or driveway cleaning often runs a few hundred dollars, and many companies offer better value when several services are bundled into one visit. Prices vary from home to home, and Triple J gives free on-site estimates.
Frequently asked questions
When is the best time for fall exterior cleaning in Charleston?
October and November usually work best. Temperatures and humidity have come down, afternoon storms are less frequent and you still have time to finish before holiday decorating begins.
Should I clean my gutters before or after the leaves fall?
Both, ideally. A cleaning in early fall removes summer buildup and storm debris. A quick check after the heaviest leaf drop keeps water flowing through the winter.
Can I pressure wash my siding myself?
You can, but high pressure can damage vinyl, fiber cement, paint and seals, and it can force water behind siding. A soft wash at low pressure is safer for most siding and kills mildew rather than just moving it around.
Do you clean homes outside of Charleston?
Yes. Triple J serves Charleston, Mount Pleasant, Summerville, North Charleston, Goose Creek, the islands and other nearby communities. You can see the full list on our service areas page.
Get a free estimate
Want to check this whole list off in one visit? Triple J Power Washing is a family-owned, licensed and insured company based in North Charleston, and we handle roofs, gutters, siding, decks and concrete across the Lowcountry. Request your free estimate or call (843) 870-7644 to get on the fall schedule.
