Someone earlier advised you not to talk about the roof being at the end of its life, but not leaking.
It is MHO that you should disclose EVERYTHING in your report but please you the word APPEARS liberally.
"It APPEARS that the roof is nearing the end of its economic life, although it APPEARS there is no leaking at this time.
Additionally, I do not know how this could be rated in Fair condition unless this home is only slightly below the quality of the comparables. Since you have identified the client, tell this person that you will need to obtain a professional contractor's bid and there will be an additional charge for the Cost to Cure, the contractor may (most likely) will charge for this. Then quote him/her in the report numerous times with his phone number in the report as well as the written bid in your addenda. It APPEARS to me that you will not be able to compare this to other properties without knowing the difference in quality and finish when comparing to the other properties without a known Cost to Cure. How do you make an adjustment in your grid without knowing this?
Good luck.