How to Clean Asphalt Shingles?

Are the asphalt shingles on your roof looking dull, stained, or covered in debris? Regularly cleaning your asphalt shingles can help maintain their appearance and extend their lifespan. But how exactly should you go about cleaning them? This introduction will explore the steps and techniques involved in cleaning asphalt shingles effectively and safely. From removing debris to tackling stains, we will provide you with the essential knowledge to restore the beauty and functionality of your asphalt shingle roof. So, let’s dive into the world of asphalt shingle cleaning and discover the tips and tricks to keep your roof looking its best.

Why Clean Asphalt Shingles

Cleaning asphalt shingles is essential for several reasons:

  • Aesthetics: Over time, asphalt shingles can accumulate algae, dirt, debris, moss, or stains, making the roof appear dirty and unsightly. Cleaning the shingles helps restore their original appearance, improving the home’s overall curb appeal.
  • Preventing Damage: Moss, algae, and debris can hold moisture against the shingles, potentially leading to rot or deterioration. Regular cleaning helps remove these elements, reducing the risk of damage and prolonging the lifespan of the shingles.
  • Preserving Functionality: Accumulated debris, such as leaves, branches, or twigs, can clog gutters and downspouts, hindering proper water drainage from the roof. By cleaning the shingles, you can prevent blockages and ensure that rainwater flows smoothly off the roof, reducing the risk of water damage.
  • Energy Efficiency: A layer of dirt or debris on the shingles can affect their reflective properties, causing the roof to absorb more heat. This can lead to increased energy consumption for cooling the home. Cleaning the shingles helps maintain their reflective surface and promotes better energy efficiency.
  • Early Detection of Issues: Cleaning the shingles allows for closer inspection, making it easier to identify any signs of damage, such as cracked or missing shingles, loose flashing, or worn-out sealant. Early detection allows for timely repairs, stopping further damage and possible leaks.

What Happens If You Take For Granted Your Asphalt Shingles?

If asphalt shingles are not regularly cleaned, several issues can arise:

  • Accumulation of Debris
  • Algae and Moss Growth
  • Staining
  • Reduced Lifespan
  • Poor Energy Efficiency

By neglecting to clean asphalt shingles, you risk compromising your roof’s appearance, functionality, and durability. Regular cleaning and maintenance can help prevent these issues, prolong your shingles’ life, and ensure your roofing system’s optimal performance.

Steps on How to Clean Asphalt Shingles

Cleaning asphalt shingles is integral to their maintenance to ensure their longevity and appearance. Here are the steps to clean asphalt shingles:

Safety Precautions

Before starting, ensure you have the necessary safety equipment, such as sturdy shoes, gloves, and safety glasses. Consider using a ladder stabilizer to prevent damage to the shingles or the roof.

  1. Prepare the Cleaning Solution: Mix a solution of mild detergent or specialized roof cleaner with water in a garden sprayer or a large bucket. Follow the manufacturer’s instructions for the appropriate dilution ratio.
  2. Wet the Roof: Wash the entire roof with water using a garden hose or a low-pressure sprayer. This will help loosen any dirt, debris, or moss.
  3. Apply the Cleaning Solution: Spray the cleaning solution onto the shingles, starting from the roof’s peak and working your way down. Ensure an even application, but avoid excessive saturation, which could damage the shingles or contribute to water infiltration.
  4. Let the Solution Sit: Allow the cleaning solution to sit on the shingles for the recommended time specified by the product manufacturer. This dwell time will allow the solution to loosen and dissolve dirt, algae, or moss.
  5. Scrubbing (if needed): For more stubborn stains or growth, gently scrub the affected areas with a soft-bristle brush or a broom. Avoid using abrasive materials or harsh brushes that could damage the shingles.
  6. Rinse Thoroughly: After the dwell time, thoroughly rinse the shingles using a garden hose or low-pressure sprayer. Start from the roof’s peak and rinse downward to remove all traces of the cleaning solution.
  7. Inspection and Additional Steps: Once the roof is rinsed, inspect the shingles for any remaining dirt or stains. Repeat the cleaning process or consider using specialized roof cleaning products.
  8. Gutter Cleaning: Debris may have washed into the gutters during the cleaning process. Clean the gutters to ensure proper drainage and prevent any potential issues.

Remember to exercise caution when walking on the roof. If you are uncomfortable or the roof is steep, hiring a professional roof cleaner is advisable to ensure safety and proper cleaning techniques.

By following these steps, you can effectively clean asphalt shingles, removing dirt, stains, and organic growth, and help maintain your roof’s overall appearance and performance.

Cleaning Asphalt Shingles, Dos and Don’ts

Cleaning asphalt shingles is integral to maintaining them in good condition and preserving their appearance. Here are some dos and don’ts to consider when cleaning asphalt shingles:


  • Use a gentle cleaning solution: Mix a solution of water and mild detergent or specialized roof cleaning products designed for asphalt shingles. Follow the manufacturer’s instructions for proper dilution.
  • Apply the solution with low pressure: Use a soft-bristle brush or a low-pressure sprayer to apply the cleaning solution to the shingles. Avoid using high-pressure washers, as they can damage the shingles.
  • Scrub gently: If stubborn stains or algae/moss grow, gently scrub the affected areas using a soft brush or sponge. Be careful not to scrub too hard, as excessive force can dislodge or damage the shingles.
  • Rinse thoroughly: Rinse the shingles thoroughly with water after applying the cleaning solution. Use a garden hose or low-pressure sprayer to remove any residue.
  • Ensure proper safety measures: When cleaning the roof, always prioritize safety. Use a sturdy ladder, wear appropriate footwear with good traction, and consider using safety equipment such as a harness.


  • Use harsh chemicals or abrasive cleaners: Avoid using bleach, solvents, or abrasive cleaners on asphalt shingles, as they can cause damage and discoloration.
  • Pressure wash at high pressure: High-pressure washing can dislodge granules, strip away protective coatings, and cause premature wear and tear on the shingles. Stick to low-pressure methods.
  • Walk on the roof: Avoid walking on the roof unless necessary, as it can lead to shingle damage. If inspections or repairs require walking on the roof, take precautions and step on the sturdy parts between the shingles.
  • Ignore safety precautions: Always prioritize safety and follow proper safety guidelines when cleaning or performing maintenance on your roof.


It is essential to clean your asphalt shingles daily to boost your lifespan. But remember that when cleaning asphalt shingles, gentle techniques and suitable cleaning solutions should be used to avoid damaging the shingles or stripping away protective granules. It’s best to consult a professional for proper cleaning methods if unsure.

Water Damage and Roofing of Cedar Park
305 Spanish Mustang Dr
Cedar Park, TX 78613, United States