Its recommended anyone cleaning moss off a roof should do it on a cloudy day.
Cleaning moss off roof.
Hose off and brush all moss loose from your roof shingles.
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.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye protection.
Apply w ith a sprayer and allow the solution to dwell on the roof surface for 15 to 20 minutes and then rinse thoroughly with low pressure water.
The most effective method of cleaning algae and moss from a roof is with a 50 50 mix of laundry strength liquid chlorine bleach and water.
Scrub at the moss with this mixture until the moss is gone.
Most roof cleaning products require at least 20 minutes for it to absorb into the moss.
Apply cleaning solution only after the roof and moss are thoroughly wet.
When applying roof cleaning products onto a roof on a hot sunny day it will quickly evaporate and you won t get the desired result.