In this situation first the leak must be fixed and secondly the roof must be treated also in order to successfully kill the root of the infestation.
Mushrooms growing on roof.
Fungus so bad there are now mushrooms growing out of the floors of the gym.
I haven t panicked because the moisture meter shows nothing on the opposite drywall side but it s obvious the siding is getting damp to the point of growing mushrooms.
From your description you may have lichen growing on the surface of your roof.
It doesn t trap as much water against the surface of the roof as moss but it can be acidic and has strands that can penetrate into the shingles.
Leaks have ruined equipment created mold issues and fungus.
If you have an area where a tree used to stand even if the stump is gone the dead roots underground may encourage mushroom growth.
Correcting the moisture problem is the first step in the eradication procedure.
It may be from a plumbing leak a roof leak or a severe lack of ventilation.
If it s gone just keep the area well raked and aerated to improve drainage.
It s not unusual to see mushrooms growing in the basement that derive their moisture from a rooftop leak.
Fungi growth can many times be found far away from the source of moisture.
For years liz says they ve been plagued by a bad roof.
If the stump is still there you can have it removed.