You could replace all the roofing with new shingles dark enough to disguise the staining or with shingles laced with copper granules which are lethal to algae.
How do you get rid of moss on a roof.
Billnovember 19 2017 at 8 04 am.
In this video this old house general contractor tom silva explains how to remove roof moss and prevent it from coming back.
When you inspect your roof and discover signs of moss dampen it with water and get rid of it with a nylon brush.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye.
Hose off and brush all moss loose from your roof shingles.
This is oof cleaning products which should be left to absorb into the moss for at least 20 minutes will not evaporate as quickly as they would on sunny days.
Do it carefully to avoid damaging the shingles.
Moss can be removed physically with water and a stiff brush on a pole or a scrub brush chemically or a bit of both.
To apply dry powder moss killer place an extension ladder against the house and climb to the roof.
Do not let the bleach solution remain on the roof any.
To apply wet moss killer attach the garden hose to the container.
3 secure the strip with roofing nails.
Power wash with low pressure.
Maintain a consistent flow of moss killer down the line.
Place a stiff bristle scrub brush on a pole or broom handle.
Dispense the moss killer in lines about 2 feet apart parallel to the roof ridge.
Allow the bleach solution to remain on the roof for 10 to 15 minutes.
1 slide a margin trowel under shingles to unstick them from the ones below.
Scrub the moss and lichen from the roof with a long handled scrub brush.
But that would only make sense if the shingles were worn out.
2 slide sacrificial zinc strip underneath the loosened shingles.
Experts recommend that you save roof moss removal for a cloudy day.
Clean the roof on a cool overcast day.
You can find copper sulfate at stores like lowes and tru value hardware being sold as root killer dries out the roots so they break away from the sides of the pipe.
Blow the roof once or twice a year to eliminate any dirt debris leaves and branches which can create moisture leading to growth of moss.
Carefully climb onto the roof using a ladder.
The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae.