Those ugly black streaks on your roof may be tempting to clean, but should you?

While the unsightly stains — caused by algae — don’t harm a roof, they do affect your home’s curb appeal. But before you climb up on your roof and start pressure washing or scrubbing your roof shingles, be sure to check the shingle manufacturer’s recommended cleaning instructions.

Better yet, call a roofing contractor who can properly clean your roof with gentle cleaning methods that won’t damage your shingles and void your warranty.

If your home is ready for a new roof, consider Atlas shingles with Scotchgard™ Protector, which helps to prevent the ugly black streaks caused by algae and can keep your roof looking like new for years.

Watch the video to learn more about the do’s and don’ts of cleaning your roof. And visit AtlasRoofing.com/roof-shingles to check out all of the great roofing products Atlas offers.