What material do I treat this roof with?

[pototea]

Hi, I have a ground floor kitchen extension which is coming up to 9 years old and I'd like to proactively apply a treatment to it as some parts are starting to crack.

If I understand correctly, to resurface it I need to match the coating with what was there before, however I do not know what the coating is.

Any advice what the coating is so I can treat it?

Any other advice to be aware of?

Thank you!

 

[opps]

Not my area of expertise, but it looks like a GRP roof (read: fibreglass with a gelcoat).

I can't see any cracks though.

 

[HERTS P&D]

Looks like it needs a wash.

Andy