Also, no go if it was near an onramp or stop sign/light where cars were constantly revving engines to accelerate ... steady traffic flow is much less intrusive.

Water intrusion through no fault of the tenant that causes mold would be on owner most times although tenants failure to report water intrusion (or any maintenance issue like a leaking pipe) that results in mold makes them somewhat culpable for the resulting additional damages caused by their neglect (mold). 

Thank youTrevor Schmidt  It is very intrusive if your landlord is able to just come into your living space while you are away.

This is just what can be seen from a non-intrusive inspection, so I am sure this is just a small portion of what is going on behind the walls.  

I am not a lawyer, but let's start with the basics: The Disclosure Form in Ohio specifically addresses the question of "water intrusion."  

Just let them know you are looking for a flashing inspection and repair for a roof stove/microwave vent that might be letting in rain intrusion.

It should not be your first (and certainly not your only) line of defense against water intrusion.

A few sources I've read suggested that tree root intrusion is the only problem that a scoping will catch because cast iron and clay pipes either rust or crack from the outside in, so unless the line is actually broken at time of inspection an impending break won't be seen. 

It has not rained, there was no intrusions from the roof, sidewalls, basement, anything.  

Because I find him to be intrusive I prefer not to tell him anything.