Another way of removing lichens from the roof is through using chlorine bleach.
Roof lichen bleach.
To apply thoroughly saturate the surface with the wet forget outdoor cleaner.
Rinse with clear water.
True to its name chlorine bleach may bleach your asphalt shingles lightening or changing the color.
The recommendation for most of the products is to hose down plants that may get dripped on when applying the solution to the roof.
If your moss problem is extensive and you plan to use a large quantity of chlorine bleach bear in mind that it will accelerate the corrosion of your metal gutters and downspouts.
Although it s an inexpensive option to remove lichen from your roof the end result may corrode downspouts gutters and flashings.
I used a pump sprayer and applied a heavy mist to the roof two times about an hour apart.
Always use a soft bristle brush as not to damage the surface where the lichen clings.
Wait 15 minutes and then repeat the application a second time.
Chlorine bleach may be applied to your gutter and flashing or your shingles to change the color.
Do not let the bleach solution remain on the roof any.
Space between the strips.
Bleach solution that drips from your roof during or after application can kill landscape plants and ruin outdoor fabrics.
A heavy spray of solution will kill the lichens and moss but results take time.
Commercial chemical preparations though costly have proven effective.
Solutions range from one cup tsp and one gallon of bleach per five gallons of water to one cup tsp and 2.
My roof has skid marks.
Get a scrubbing brush and water to gently brush the lichen off.
Chlorine bleach will kill roof moss but when you rinse if off the roof it may kill the plants growing alongside your house too.
5 continue installing zinc strips across length of roof end to end leaving a 1 8 in.
Next thing you know it could grow a mossy beard.
7 protect nearby shrubs and lawn with plastic tarps.
Once applied the wet forget starts to work on the surface and then over time will remove the dead lichen with exposure to the wind and rain.
8 spray the cleaning solution onto the shingles using a garden sprayer.
Scrub the moss and lichen from the roof with a long handled scrub brush.
6 to kill existing moss and lichen make a cleaning solution of equal parts bleach and water.