Safety First
- Weather: Clean the roof shingles in calm, mild weather. Too much heat can dry up your cleaning solution even before it has started to work effectively. It is also not safe to stay on the roof on windy days.
This project should only be undertaken by those experienced with the essential safety protocols for roof work, as attempting it without such knowledge could be hazardous.
- Secure the Area: Use drop cloths to cover anything you don’t want to get your cleaning solution over. It might drip from your roof over the deck and patio furniture so make sure you cover them as well. Also, make sure to cover any plants, gardens and trees around.
- Safety: Wear a safety harness, a hard hat and shoes that won’t slip. Also, wear a mask, gloves and protective eyewear to protect yourself from any harsh or strong cleaners that you may use.
How To Clean Roof Shingles
While a good scrub might seem tempting, roof shingles are delicate. Using the wrong methods and cleaning solutions can compromise the integrity of the shingles. We’ll show you how to clean your roof without damaging your shingles:
- Gently sweep the roof to get rid of any loose debris like accumulated dust or dry leaves.
- Mix vinegar with equal parts of water to deal with moss and algae. While bleach also effectively treats build-up, use it sparingly otherwise it can damage your shingles.
- Commercial cleaners that specifically treat algae and moss are a good way to get rid of the build-up. Simply, refer to the manufacturer’s instructions for proper application.
Never use any abrasive cleaners or methods. If you’re not sure, always test on a hidden area first before you commit to a full clean.
- Keep in mind that the roof’s surface can get slippery when wet. Try working from a step ladder instead of walking over the roof, if possible.
- Before you start applying your cleaning solution, check the gutters and downspouts so that when you get to wash them, it flows through easily.
- Add your cleaning solution in a spray bottle. Start applying your cleaning solution from the top and work your way downwards.
While you should spray an even coat, you may concentrate the solution on areas with heavy grime or algae and moss build-up. Use a soft bristle brush to gently scrub such areas.
How to Get Rid of Moss on a Roof
If you’re wondering how to remove moss and mold from roof shingles, start with purchasing a mold and mildew stain remover meant for outdoor use. Make sure it is compatible with your shingles.
- Follow the instructions mentioned on the outdoor cleaner.
- It is advisable to leave the cleaning solution on for at least 15-20 minutes for an effective clean. Regardless, always follow the manufacturer’s instructions for the cleaning agent you use.
- Fill your spray bottle with water and wash down your roof. If possible and not too difficult, use a garden hose. Keep rinsing the roof until you are sure that the cleaning solution or any kind of dirt and grime is not left behind.
While a pressure washer may seem like an ideal solution to wash your roof shingles, avoid it. A pressure washer will actually damage your shingles.
If you still feel that the initial clean hasn’t gotten rid of grime, dirt and moss, don't hesitate to go back and reapply the cleaning solution on tough spots.
- After you’re done cleaning your roof shingles, get down with care. Make sure that you rinse your plants that may have accidentally come in contact with the cleaning solution.
Maintenance Tips
Now that you know how to clean your roof shingles, make sure that it stays that way. Routine checks are key. Perform inspections at least twice a year to make any repairs and take to cleaning at least once a year. Consider applying moss or algae treatment to deal with these build-ups. Trim trees that are too close to your roof to prevent moisture from affecting your shingles. Lastly, cleaning your gutters frequently will also prevent stagnant water and debris from accumulating over your roof.