7 Signs Your House Needs a Professional Wash

1. Green or gray film on your siding

That film is algae or mildew, usually worst on the north side and anywhere shaded by trees. It spreads over time and can stain lighter siding.

2. Black streaks on the roof

Dark streaks running down asphalt shingles are typically algae. They get darker and wider each year. Here's what causes them.

3. Tiger stripes on your gutters

Dark vertical stripes on the outside of gutters come from runoff residue that bonds to the surface. A normal rinse won't remove them; it takes gutter brightening.

4. A driveway that's darker than it used to be

Concrete slowly darkens with dirt, tire marks, oil and organic growth. If you remember it being lighter, it's due for a cleaning.

5. Slick sidewalks, steps or decks

A slippery surface when wet usually means algae. It's a safety issue, especially on shaded steps and walkways.

6. Cobwebs, pollen and dirt around windows and soffits

Spider webs, wasp nests and pollen collect under eaves and around window frames, making even a well-kept home look neglected.

7. You're selling, hosting or it's been more than two years

A clean exterior makes a strong first impression for listing photos, showings and events. If it's been more than two years since your last wash, it's likely time regardless.

What to do next

Snap a few photos of the worst areas and send them over. We'll tell you what's growing, which method is safe for your surfaces, and give you a free quote.