[TowerTalk] : Nube rebar question

[Bill via TowerTalk]

Yep...here it is.
 
When using a roof mount you are forced to keep the tower guyed at  all 
times.  For modest installations, 50 or 60 feet it is a cinch to haul a  Yagi up 
the side of an unguyed tower.   After raising it to the top,  you reattach 
the guys.
 
I've done it dozens of times and it beat any other way to get the  antenna 
to the top.  
Cost of a used section of 25 is around 50-70 bucks and you only  lose 1/3 
of it.  Roof top fixtures are more expensive.
 
K4XS
 
 
In a message dated 12/17/2014 12:17:19 A.M. Coordinated Universal Ti,  
jbwolf at comcast.net writes:

Can  anyone provide a good reason not use a roof mount for  these
installations?   I would be very  interested.