Garage Felt shingles leaking / mould on inside

[Badger40]

Hello,

First year in this house and noticed some yellow mould on the inside of the garage roof either side of the truss running all the way down. I’m assuming the felt shingles on the other side of the ply are letting water through. I got on the roof for a look and they look ok although there is some moss growth in places. Nothing seems loose.

What can I look for / what can be repaired? Never had felt shingles before so this is all new to me.

Thanks for any input.

 

[Wayners]

Kill Moss.

Ventilation either end of garage so you don't get condensation.
You might need some insulation to stop the mould...
Need more information to get you a better answer

 

[Badger40]

I’ve sprayed with wet and forget the worst of the moss isn’t quite where the worst of the mould is but not a million miles away.