A few options you have include.
Moss growth on concrete roof tiles.
Moss is probably the easiest growth on your roof to identify.
While moss doesn t have real roots it has tiny protrusions that look like roots and it will form its own soil by collecting dirt and debris from the air.
Moss is a nasty little weed that loves to grow in shady and damp conditions and if it starts growing on your roof can end up causing problems to tiles gutters and even stop water draining correctly from the roof.
Moss is most likely to build upon north facing roof areas where there is less sunlight and plenty of moisture.
Generally you will find lichen growing on the exposed surfaces while the moss will grow in the corners interlocks and head laps where they shelter and get more water especially the side laps of concrete interlocking tiles.
It looks like a little patch of grass or maybe a really big patch if you ve let it go for a while.
Moss can grow quite quickly and it will grow in between roof tiles filling in the voids and lifting up roof tiles and slates.
Applying moss killer is an obvious removal option but be aware that these chemicals have the potential to contaminate.
Moss growing under roof slate and tiles can push the slate out of position allowing rainwater to seep into the roof structure.
You can control the growth of moss on your roof by ensuring that your roof properly drains so that water does not stay on your roof.
Carefully place a ladder near the area of moss growth and don slip resistant shoes old clothes rubber gloves and eye.
Most techniques that we have come across to remove moss are often achieved by violent means such as power washing which may cause damage to the roof especially when combined with unnecessary foot traffic often leading to cracked or broken roof tiles.
When rain finds its way into the roofing structure that s when decay and rot sets in.
Roof moss there are over 12 000 types of moss most grown in clumps and release spores into the air.
Try using a long handled.
The removal of the moss is often followed up by painting the roof tiles.
The presence or absence of much sunlight on a roof surface is often a determining factor in the amount of moss or lichens growth more sun less moss and lichens.
Specialists can assess.
Moss will generally only grown on the shady side of your roof.
Hose off and brush all moss loose from your roof shingles.