01 May 1999
e. Field Review and Observation. Care should be taken to assure that the interior is protected at all
times. New penetrations must be sealed as work progresses, and nightly tie-offs must be well
(1) Hazardous Materials. Limit the quantity of hazardous materials stored on site. Propane
bottles may need to be removed from the site each evening. If torching has been done a fire watch with
fire fighting equipment must be established for at least 1-hour after the last torch is extinguished. Kettles
and other dangerous equipment must be placed behind fenced pedestrian barriers.
(2) Drain Function. Remove drain plugs each evening and make sure construction material does
not block water flow to the drains.
11-5. MAINTENANCE CONSIDERATIONS.
a. General. Evaluation of the existing roofing system should highlight defects in the current
maintenance program. These may have a bearing on the selection of the new system.
b. Repair or Replace. It is a good rule to replace base flashings of membrane roof systems even
if the rest of the roof is only going to be re-covered. If metal counterflashings and copings can be
removed and replaced without sustaining excessive damage, they may be reused.
c. Repairs: Emergency, Temporary, and Permanent. This category pertains to the new roof
system selected (see appropriate Chapters in this EI).
d. Maintenance Checklists. This category pertains to the new roof system selected (see Chapter