Your roof does more than protect it defines your home’s curb appeal. Over time, Virginia’s humidity invites algae, moss, and black streaks that make your roof look old, worn, and neglected. That’s where Lawn Theory’s professional roof cleaning services come in.
We use a low-pressure soft wash system that gently removes algae, moss, lichen, and stains without damaging your shingles. Serving Fairfax, Loudoun, Arlington, Alexandria, Prince William, and Falls Church, our veteran-owned and operated team restores your roof’s beauty and lifespan safely.
📞 Call (703) 650-5655 or Request a Free Roof Inspection Today!
What Is Roof Cleaning and Why It Matters
Roof cleaning is the process of safely removing organic buildup like algae, moss, and lichen from roofing materials. Over time, Virginia’s humid summers, shaded neighborhoods, and heavy tree cover create the perfect breeding ground for roof algae and moss.
These organisms don’t just stain your roof they shorten its life by feeding on asphalt granules, lifting shingles, and trapping moisture. Without proper cleaning, you risk leaks, rot, and even higher energy bills due to darkened, heat-absorbing surfaces.
Lawn Theory’s roof cleaning services target these issues at the source restoring your roof’s integrity and appearance while preventing regrowth.
Why Choose Lawn Theory’s Soft Wash Roof Cleaning
Unlike pressure washing, soft washing uses eco-friendly, biodegradable solutions and ultra-low water pressure to clean without damage.
Benefits of Soft Wash Roof Cleaning:
- Protects Shingle Integrity: No granule loss or high-pressure abrasion.
- Kills Algae and Moss at the Root: Prevents quick regrowth.
- Improves Energy Efficiency: Lighter roofs reflect heat better.
- Extends Roof Lifespan: Removes decay-causing organisms before they cause damage.
- Safe for Landscaping: All plants and nearby surfaces are carefully covered and rinsed.
Did you know? The black streaks on your shingles aren’t dirt they’re Gloeocapsa magma algae, a living organism feeding on your roof. Our cleaning solution eliminates it completely.
Soft Wash vs Pressure Wash: What’s Best for Your Roof?
| Feature | Soft Wash (Recommended) | Pressure Wash (Not for Shingles) |
|---|---|---|
| Pressure Level | Low PSI (<100) | High PSI (>2000) |
| Primary Use | Shingle, asphalt, tile, metal roofs | Concrete or hard surfaces |
| Removes Algae/Moss | Kills at root | Only removes surface |
| Shingle Safety | Safe | Damaging |
| Longevity of Results | 2–4 years | 6–12 months |
| Manufacturer Approved | Yes | Often voids warranties |
For shingle roofs in Northern Virginia, soft wash roof cleaning is the gold standard gentle, effective, and long-lasting.
Our Roof Cleaning Process (Step-by-Step)
Roof Inspection
We assess your roof from the ground or ladder to identify algae, moss, and damage without stepping on shingles.
Plant & Property Protection
Your landscaping, walls, and water features are covered and pre-rinsed to ensure zero chemical impact.
Soft Wash Application
We apply a biodegradable detergent blend at low pressure, killing algae, moss, and lichen deep at the root.
Gentle Rinse
A low-pressure rinse clears away all residue, restoring your roof’s original color and finish.
Final Inspection & Clean-Up
We inspect the entire roof, gutters, and surrounding areas leaving your property spotless and photo-ready.
Typical duration: 3–5 hours for a single-story home; full-day for large or steep roofs.
Roof Cleaning Cost in Northern Virginia
Transparent pricing. No surprises.
At Lawn Theory, we base your quote on roof size, pitch, and the level of organic buildup.
| Package | Price | Includes |
|---|---|---|
| Small Roof | $399 | Up to 1,500 sq. ft. • Soft wash cleaning • Algae & moss removal • Basic gutter cleaning |
| Medium Roof | $549 | 1,500–2,500 sq. ft. • Complete soft wash • Full organism removal • Gutter cleaning • 6-month guarantee |
| Large Roof | $749 | 2,500+ sq. ft. • Heavy stain treatment • Full gutter service • 12-month guarantee • Priority scheduling |
💬 Homes with heavy moss or multi-story access may require an on-site quote.
📞 Call (703) 650-5655 or Request a Free Roof Inspection Today!
Is Roof Cleaning Safe for My Shingles & Home?
Absolutely. When done right, roof cleaning is 100% safe for shingles and even recommended by major roofing manufacturers.
Our soft wash system:
- Uses low pressure (under 100 PSI) to protect granules.
- Applies EPA-safe biodegradable solutions that dissolve organic growth.
- Prevents damage that voids manufacturer warranties (common with DIY or pressure washing).
Important: Pressure washing can strip protective granules from asphalt shingles, voiding warranties and reducing lifespan by up to 30%.
How Often Should You Clean Your Roof in Northern Virginia?
In Northern Virginia’s humid climate, roofs should be professionally cleaned every 2–4 years, depending on exposure to shade and trees.
- Fairfax / Loudoun County homes with heavy tree cover: annual inspections recommended.
- Arlington & Alexandria homeowners with lighter exposure: every 3–4 years is sufficient.
Watch for these signs it’s time:
- Black streaks or green patches.
- Moss lifting shingles.
- Noticeable streaks on gutters or eaves.
Routine roof cleaning prevents premature wear and keeps your home looking pristine year-round.
DIY Roof Cleaning – Why It’s Risky
DIY might sound cheaper, but it often costs more in repairs.
Risks of DIY Roof Cleaning:
- Fall & ladder accidents on steep pitches.
- Incorrect chemical mixes that stain shingles.
- High-pressure washers stripping shingle granules.
- Incomplete algae kill leading to quick regrowth.
Lawn Theory handles it all safely with professional fall protection, controlled equipment, and industry-approved detergents.
Add-On Exterior Cleaning Services
Enhance your home’s exterior with bundled services and save up to 20%:
- 🌀 Gutter Cleaning & Guard Installation
- 🧼 Siding Soft Wash & Driveway Pressure Washing
- 🌳 Deck & Patio Cleaning
- 🏠 Roof Treatment Plans (protective algaecide coatings to extend results)
Ask about our Annual Maintenance Program for year-round exterior care.
Local Case Studies – Real Results
Fairfax, VA Black Streak Removal
A 2,000 sq. ft. shingle roof with heavy algae streaking restored in under 4 hours. Before-and-after photos revealed a full color recovery, adding instant curb appeal.
Loudoun County Moss & Lichen Treatment
A steep, tree-covered roof cleaned using full soft wash treatment. Moss eliminated, gutters cleared, and follow-up inspection showed zero regrowth after six months.
“Our roof looks brand-new again. Lawn Theory’s crew was careful, professional, and fast!” — Amy D., Fairfax VA
Roof Cleaning FAQs
How much does roof cleaning cost in Northern Virginia?
Prices range from $399 for small roofs to $749 for large or heavily stained roofs. Exact costs depend on roof size, slope, and condition.
Is roof cleaning safe for shingles?
Yes. Our soft wash system is safe for asphalt, metal, and tile roofs, and it won’t damage granules like pressure washing does.
How long does roof cleaning last?
Typically 2–4 years. Homes under tree cover or near shade may need cleaning more frequently.
Will roof cleaning remove moss completely?
Yes our solution kills moss and algae at the root. Heavily infested roofs may require a second treatment or protective coating.
Can roof cleaning void my shingle warranty?
Not with soft washing. We follow manufacturer-approved guidelines to ensure warranties remain valid.
Should gutters be cleaned at the same time?
Absolutely. Debris buildup feeds algae and moss regrowth. Every Lawn Theory package includes gutter cleaning.
Ready to Restore Your Roof?
It’s time to bring your home’s roof back to life safely and affordably.
Trust Lawn Theory, Northern Virginia’s veteran-owned exterior cleaning company, to deliver spotless results with professional care. See us on Instagram & YouTube.
