You should do only what is asked on the form. Just like I always try to tell everyone. Nothing more ever… Any of your other opinions will likely hurt your customer. Include picture and the correct answer for question 2 for the unit you are inspecting that is it. Roof sketches are not required and should not be done.
I read and agree with the commments made prior to my posting this response but have to ask? what is your evaluation of the tie in between the units and how long would you expect it to remain leak free? This is a case where the nieghbor controls the destiny of the owners financial security.
The predominant roof covering is defined as 50.01% of the total surface area of the structure. If no firewall extends above the roof line then the roof covering over the adjacent neighbors dwelling must be taken into consideration. If a firewall does in fact exist above the roof line then you will have your subject’s roof covering ONLY to consider.