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Re: FRT or Equivalent Protection
You are not being too anal, you are being too lax if you do not write it up ... when it is needed.
IF (big *IF* there) there is a parapet wall which is at least 30 inches high above the roof, on townhouse has a wall ending at least 30 inches higher than the roof of the lower townhouse adjacent to it, and, (for Type V construction - which is what almost all -if not all - houses are, Type V construction) 1) there are no openings through the roof withing 4 feet of the fire wall, and 2) the roof is a minimum Class B roof covering (asphalt composition shingles are Class A), 3) and the roof sheathing is either fire retardant treated or protected for 4 feet from each side of the wall.
You are referring to looking for that last 1), 2), 3) listed above. Don't forget to look for the other options if that is not there. In some areas, parapet walls are the preferred method, in other areas, it's protecting the roof sheathing, other areas prefer to use architectural design and step the roofs (one story next to a two story next to a one story next to a higher roof one story, etc.)
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