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 to get moss off roof shingles.
Always work from the top of the roof downward to ensure water pours off the roof and so the water or tools won t lift and break shingles and tiles.
Space between the strips.
However scrubbing is likely to damage the asphalt shingles and remove their granules.
4 apply a dab of sealant to every nail head and run a bead of sealant under each shingle.
There are many ways to remove moss that tends to grow in shaded areas.
You may be tempted to scrub the moss off the shingles because moss grips shingles quite strongly.
A thick growth of moss works like a sponge keeping the roofing damp for long periods and it can lift edges of shingles making them vulnerable to blowing off in a windstorm.
Hose off and brush all moss loose from your roof shingles.
Pressure washers can be very strong and certainly strong enough to break a shingle s adhesive and lift it up.
Scrape off the moss.
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 protection.
5 continue installing zinc strips across length of roof end to end leaving a 1 8 in.
When leaves and other material collect on your roof a perfect bed is formed for moss and lichens to grow.
You can remove moss and lichens from your roof by using vinegar as a environmentally friendly weedkiller.
But that would only make sense if the shingles were worn out.
7 protect nearby shrubs and lawn with plastic tarps.
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.
Moss itself is a plant while lichen conisist of a fungus and a photosyntheizing plant living together.
Scrub shingles 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.
Moss and green algae require dead organic matter for nutrients so you can prevent their growth by blowing off the shingles to remove junk from trees that tend to accumulate between the tabs.
6 to kill existing moss and lichen make a cleaning solution of equal parts bleach and water.
Once the moss has been thoroughly eradicated from the roof take steps to keep moss from returning.