How to Clean and Maintain Your Roof

    Photo: Epic Fireworks/flickrProtect one of the largest parts of your home -- the roof -- with regular cleaning and inspection. This should be done at least twice a year, in fall to get your roof in shape for the cold weather and again in spring after the hardships of winter. More frequent checkups may be necessary after windstorms or heavy snowfalls. Read the terms of your homeowner's insurance policy and your roofing warranty carefully to see what roof maintenance is required. For the best care, set up a professional maintenance plan through your roofing contractor.

    However, you can handle basic maintenance yourself. Here's how to clean your roof, and problem spots to look for.

    Roof Safety Tips

    If you are planning to clean your roof yourself, always work from the top down. Use a sturdy ladder and work with a buddy, or at least let someone know that you'll be cleaning from atop the ladder. Protect your hands with work gloves and your eyes with goggles. Avoid walking on the roof surface where possible; however, if you must do so, make sure you are wearing rubber-soled shoes. Watch out for power lines and stay off the roof during a rainfall to minimize the risk of electric shock.

    How to Clean Your Roof

    1. A thick layer of snow. Pull the snow off with a special snow rake to relieve excess pressure on the roof structure.

    2. Debris such as leaves and sticks. These can hold in moisture (in the first case) or scrape your roof (in the second). Remove debris with a broom.

    3. Moss, fungus, or algae. These organisms will "eat" your roof if left unchecked. Scrub off with a long-handled brush. Then prevent them returning by installing lead, zinc, or copper control strips.

    4. Nearby trees. Trim overhanging branches since these may fall in a storm, drop fruit, or act as a convenient "bridge" to let animal pests climb onto your roof.

    5. Bird population. Bird droppings often have a high acid content, which corrodes roofing material. Nests may block your roof drains or chimney, both tremendous hazards. Drain blockage results in standing water, which can cause the roof to collapse. A nest in your chimney is problematic in 2 ways when you use your fireplace: it's highly flammable and can lead to lethal carbon monoxide buildup inside your home. Wear a breathing mask when removing droppings or nests to avoid contaminant inhalation. Install a chimney cap to keep birds and vermin out in future.

    Inspect the Roofing Material 

    • Check for loose, cracked, curled, blistered, or missing shingles, which will need to be repaired or replaced.

    • Look for rot or insect infestation in the wood.

    • Inspect the flashing in the area of the chimney, vents, and exhaust pipes. Be on the alert for bends, holes, or dry, loose caulk.

    • While you're at it, check the condition of the caulk or mortar on roof joints and the chimney.

    • Investigate for traces of rust in any metal pieces.

    Gutters and Downspouts

    Look for dirt and fallen leaves. Use a gutter scoop (plastic for flexibility and to avoid scraping the gutter bottom), together with a garden hose, to clean roof gutters and downspouts. Remove all clogs, which can otherwise lead to ice dams.

    HEADS UP: Large amounts of colored shingle granules in your gutter signal a roof that is wearing out. You are well advised to call in a professional to inspect the condition of your roofing.   

    Under the Roof

    Look at the underside of your roof from the attic as well. This will tell you if there are any danger signs of leakage, such as dark patches, streaks, wood rot, dampness, dripping water, or mold. Getting leaks taken care of as quickly as possible -- before they do serious damage -- is one of the most essential roof maintenance tasks.

    Laura Firszt writes for

    Updated December 4, 2018.

    Get Free Quotes

    Looking for a Pro? Call us at (866) 441-6648

    Get Free Quotes
    • Service Needed
    • Zip Code
    Get quotes from qualified local contractors