"Exterior / Roof Survey Findings: The roof, roof drainage systems, jacks, flashings, skylights, chimneys, other roof penetrations were observed within the limits of accessibility. The method of observation, which is suggestive of the extent to which the roof and related components were observed, is set forth in the components section. Wall cladding, flashing, trim, eaves and rake fascias (barge rafters), doors, windows, and garage doors were observed if present. If bedroom windows have security bars, they may be required to have release mechanisms. The release mechanisms are not tested by the inspection company. It is strongly recommended that you have the owner or agent demonstrate the release mechanism on each window. Significant visible deficiencies or potential concerns, if any, are reported below. Any visible deficiencies in abutting or attached decks may be reported in the STRUCTURE section rather than here. Visible signs of leaks or abnormal condensation (if any) on surfaces are reported in this, and/or other pertinent, sections. Exterior systems or components are indicated by type or described in the components section. [R] [M] [N] 1000: Roof repairs / general maintenance needed. Roof deck appeared to have sagging areas [P] [F] 1120.02: Cut back tree limbs to break contact with roof. See series 1120.02 photo(s) [P] [N] 1120.02: Cut back tree limbs to break contact with roof. See series 1120.02 photo(s) [R] [P] [N] 1230.04: Metal flashing faulty or otherwise amiss. Flashing not flat on roof - could allow wind to damage materials. See series 1230.04 photo(s) [D] [N] [P] [F] 1280.13: Downspout part(s) appear to be missing. See series 1280.13 photo(s) [A] [N] 1320.02: Siding buckled. Soffit on rear of home appears to have and area that is either sagging or a change in pitch. [A] 1320.03: Siding warped. Noted at the rear of the building. See series 1320.03 photo(s) [A] [F] 1530.03: Window faulty or otherwise amiss. Noted at the front entry door. Photo: 1120.02 (1) Photo: 1120.02 (2) Photo: 1230.04"
little excerpt from Mike's report. I have a little confusion on what the letter and numbers are and why.