CEMP-ET
TI 809-53
01 May 1999
c. Shop Drawing Submittals. Drawings of intersections of expansion joints, curbs, edging,
flashings and copings should be required. These should be detail specific and dimensioned, not
manufacturer's standard detail plates.
d. Design Submittal Requirements.
(1) Manufacturer Assurance. Require the manufacturer to verify in writing that the proposed
system is compatible with the roof deck, vapor retarder, and insulation and is appropriate for this
application.
(2) Code Compliance. Require evidence of compliance of the complete roof system with fire,
wind, or other specified code requirements.
e. Field Review and Observation. Full time visual inspection by qualified inspectors is
recommended. On major roofing projects, require periodic inspection by the manufacturer.
4-5. MAINTENANCE CONSIDERATIONS.
a. General. Built-up roofing, especially at flashing and penetrations, is heavily dependent upon
inspection and maintenance. Procedures listed in the joint NRCA/ARMA/SPRI and RIEI maintenance
manuals should be followed.
b. Repair or Replace.
Bituminous repairs are relatively uncomplicated, and may be
accomplished using solvent based mastics with appropriate reinforcement, or by the use of hot,
torched or cold applied modified bitumens. Large repairs can be more effectively achieved with hot
bitumen. When areas are damaged and the insulation underneath is wet, the affected areas can be
removed, replaced with intact materials, and tied back into the existing roof system.
c.
Repairs: Emergency, Temporary, and Permanent.
(1) Emergency Repairs. Repairs may be made using asphalt mastic, peel and stick MB
sheets, duct tape, or application of bentonite clay or portland cement to limit moisture intrusion. As
soon as weather permits temporary or permanent repairs must be made.
(2) Temporary Repairs. Patches generally consist of reinforcing fabric embedded in cold
mastics or torch-applied modified bituminous material. In either case cleaning and priming of the tie-in
area is essential. Asphalt primer is generally used. (There is a tar primer for coal tar pitch
membranes.) Asphaltic materials should be used on asphalt BUR and tar materials on coal tar
membranes.
(3) Permanent Repairs. These repairs are similar to temporary but the restored area should
at least equal the number of reinforcing plies in the rest of the membrane.
d. Repair Work by User. The occupants should keep compatible mastic, trowels, and reinforcing
available for emergency repairs and patching. Torching of modified bituminous material requires fuel,
appropriate tools and materials, fire extinguishers, and trained technicians but is quick and very
effective when done properly.
e. Checklists. Use RIEI or ROOFER checklists for visual inspections. Perimeters and flashings
are high priority items as are roof drains.
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