If you've noticed dark streaks running down roofs in Oakton, Fair Oaks or Greenbriar, you're not imagining it. They're one of the most common questions we get this time of year.
The streaks are algae. It grows on shaded, damp shingles and spreads from roof to roof, which is why you often see a whole street with it.
A few things homeowners should know:
1. It isn't dirt, and it won't wash off in the rain.
2. Never pressure wash a shingle roof. High pressure strips the granules that protect the shingles.
3. A low-pressure soft wash with a cleaning solution removes the algae safely.
4. Trimming branches that shade the roof helps keep it from coming back.
About the author: AllPro PowerWashing is a locally owned exterior cleaning company based in Manassas, serving homeowners across Oakton, Fairfax, Chantilly and Northern Virginia. Questions? 571-364-4466 or allpropowerwashingllc.com

Prince William County

Michelle Witte

Washington Metropolitan Area

Manassas

Virginia

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The trees around Burke Lake, Lake Accotink and Kings Park hold their leaves longer than most, which means gutters cleaned in October are often full again by Thanksgiving. Here's a short checklist from our crew for the next few weeks.
1. Look at the gutters after the last big leaf drop, not before. One late cleaning beats two early ones.
2. Check the downspouts. A clogged downspout sends water over the gutter edge even when the gutter itself looks clear.
3. Watch the spots where water pools by the foundation after rain. That's usually the gutter run above it.
4. Don't forget the back of the house. It's where most overflow stains on siding start.
5. If ice formed along your roof edge last winter, full gutters were likely part of the reason.
About the author: AllPro PowerWashing is a locally owned exterior cleaning company based in Manassas, serving homeowners across Burke, Springfield, Annandale and Northern Virginia. Questions? 571-364-4466 or allpropowerwashingllc.com

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