Have you noticed streaks of brown, black, or green on your shingle or tile roof?  If so, you may have seen the signs of algae or moss developing.  Moss and algae can wreak havoc on your roof and leave you with more issues than you thought possible. 

HOW DO MOSS AND ALGAE DEVELOP ON ROOFS?

Moss and algae both develop on roofs as a result of damp conditions.  Wind can carry the spores to other areas of the roof as well.

WHY ARE MOSS AND ALGAE BAD FOR YOUR ROOF?

Moss and algae damage your roof because they retain moisture on the roof.  When your roof is continuously damp, shingles or tiles may begin to deteriorate.  Over time, your roof may leak.

Moss can also grow under shingles or tiles, shifting them in different angles.  The moss growth can dam water and redirect it beneath the shingles or tiles, which leads to water working its way inside.

Finally, moss and algae are not great for your home’s curb appeal.

HOW CAN YOU PREVENT MOSS AND ALGAE FROM GROWING ON YOUR ROOF?

You can prevent moss and algae from growing on your roof or keep it from getting worse.  To start, trim any trees that overhang your roof, especially cutting back growth that is within a couple feet of the roof surface.

Some people also install strips of zinc and copper on the roof. The strips may prevent growths.

Professionals also offer regular roof cleanings.  They will provide preventative maintenance that ensures you never have to worry about the development of any growths.

Check your rain gutters.  Clogged rain gutters retain moisture that may contribute to roof problems.

CAN YOU REMOVE MOSS AND ALGAE FROM YOUR ROOF?

 Moss and algae may be removed or killed with a water hose and appropriate chemicals.  Using a pressure washer is generally not recommended, since you may also ruin your roof or shorten its life span because of the pressure of the water.

You should call a roofing professional to learn more about the safety and appearance of your roof.  Professionals understand the dangers of moss and algae, can find the correct source of the problem, and deal with it with the proper tools.  Professionals often use chemicals to kill the growths and prevent out-of-control growth.