Both algae and moss can build up on your roof due to bad weather and bad drainage, and they can certainly cause rot.
Once it establishes itself, moss gathers even more moisture to the surface of the roof.
It then makes its way into the wood.
This is why it is quite dangerous to allow moss, pine needles, leaves and other types of debris to gather on your roof over time.
A roof that is not maintained will trap moisture, it will act like a sponge.
If this moisture does not dry out for a long period, it will damage the roof; leading to leaks.
Will you just tolerate the moss on your roof? Of course not! Is it significant to have it removed? Yes! It will prolong your roof's life.
Rather than replacing your roof or to have it repaired, it is better to have someone clean the roof to remove the moss.
If you want your roof to last long, maintenance is very important.
To sum it all up, moss will slow down the fall of rainwater into the roof's gutters.
They will really attach to the roof.
There are several types of roof moss, some are easy to remove and some are not.
But, the longer it stays on your roof, the harder it is to remove it.
It is not, then, hard to understand that getting your roof cleaned and maintained regularly will extend your roof's life.
In addition to this you will also get a clean and well-kept appearance; increasing the curb-appeal of your property as well.
Roof moss removal needs to be done by an expert:

• The roof is a dangerous location and it requires a professional to do the moss removal.
  
• The roofers know how to remove the roof and other debris without damaging your roof.
  
• They have all the right type of moss and algae treatment chemicals and the necessary tools.
  

You may ask, who will I hire to get the job done? You need to contact a licensed, insured, and bonded company to do this.
It should be a roofing company that has a lot of experience with roof moss removal both on commercial and residential properties.
Look around for someone who will give you the following:

• free estimation of services,
• useful advice,
• list of certification and qualifications,
• references of other property owners who have used their services.
  

It is really important to keep in mind that the roof is a very essential part of your house and the repairs can be quite expensive.