A homemade cleaner of one part liquid chlorine bleach to one part of water can also be effective in removing and killing moss that clings to the roof tiles.
Cleaning moss off shingle roofs.
Before applying a moss remover cleaner use a scrub brush 3 15 the home depot or a long handled soft bristle brush to gently scrape or pluck moss from the roof shingles or tiles.
If you have a consistent problem with mold growth on your roof consult a roofing professional.
If chunks of algae or moss or heavy stains remain on the surface after rinsing let the roof dry then spray on the bleach solution again.
Climb up to the roof and begin scraping off dead moss from the shingles using a putty knife or painter s 5 in 1 tool and working from the bottom up.
Use the tool to gently lift away matted moss that has gathered on the flat sections of the shingles.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye.
Apply liquid cleaners with a hand pump sprayer or with a pressure washer on the lowest setting so as not to cause any damage to the shingles.
You can try brushing off algae and moss with a brush or broom with medium stiff bristles but don t scrub too hard.
Hose off and brush all moss loose from your roof shingles.
Never use a pressure washer to wash or rinse shingles.
Work on one small section at a time which allows you better control of the brush and your scrubbing motions.