Mushrooms don't grow from grout, they grow from decomposing wood behind the grout.
Do you know the difference between a "clean" crawlspace and a "dirty" one?
"The toilet flushes, what else could be wrong?"
Home air is often recirculated, how fresh is your air?
Don't let the water flow into your house.
"Excuse me, your siding is falling off"
The nest may be gone, but the opportunity for reentry is still there.
Who knows how qualified the contractor was, but the work quality is evident.
Was your roof installed correctly?
Insulation keeps your house warm or cool. Unless it is on the ground, then it's a highway for critters.
Notice the hazing on the floor between the toilet and the tile shower. It is a good sign water damage has occured.
Post Inspection Removal
The tile piece and floor were pulled up post inspection, revealing saturated wood and floor from an improperly installed/sealed tile curb.
Are your exposed rafter tails rotten?
Big deal or common crack?
They don't last forever, what kind of shape is your roof in?
A little off center...
Modified trusses and a missing mending plate
Open plumbing in the crawl space gives a whole new definition to a "crappy crawl".