Growth on roof tiles

[Jupiter01]

I’ve noticed this on my tiles?
Can someone please advise on what it may be and how it’s caused/should be treated?

Thanks in advance.

 

[KenGMac]

Jupiter01, good evening

Looks a lot like Litchen?

PS your image as posted has / does arrive inverted?

 

[StephenStephen]

Are you near the sea?
I agree - it looks like lichen - no need to treat it

 

[KenGMac]

Litchen is a really good indicator of air quality?

Unlike Moss on a roof litchen is totally harmless, Moss on the other hand can and does cause problems?

Ken

 

[Mw Roofline]

Character!

 

[noseall]

Marley Wessex - low pitch - north east elevation = growth.

Probably.

 

[Jupiter01]

I live in the south east and no where close to the sea. Should I ignore or do something about this?

 

[StephenStephen]

I live in the south east and no where close to the sea. Should I ignore or do something about this?

I was curious about location as it looks to me like a lichen which seems more prevalent near the sea. I don't think it's anything you need to do anything about.