NOTE: Insert appropriate Section number and title
in the blank below using format per UFC 1-300-02.
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Provide metal flashing for all pipes, ducts, and conduits projecting
through the roof surface and for equipment supports, guy wire anchors, and
similar items supported by or attached to the roof deck. Goose-necks,
rainhoods, power roof ventilators, and [_____] are specified in [_____].
3.1.28
Single Pipe Vents
See Table I, footnote (d). Set flange of sleeve in bituminous plastic
cement and nail 75 mm 3 inches on centers. Bend the top of sleeve over and
extend down into the vent pipe a minimum of 50 mm 2 inches. For long runs
or long rises above the deck, where it is impractical to cover the vent
pipe with lead, use a two-piece formed metal housing. Set metal housing
with a metal sleeve having a 100 mm 4 inch roof flange in bituminous
plastic cement and nailed 75 mm 3 inches on centers. Extend sleeve a
minimum of 200 mm 8 inches above the roof deck and lapped a minimum of 75 mm
3 inches by a metal hood secured to the vent pipe by a draw band. Seal
the area of hood in contact with vent pipe with an approved sealant.
Sealants are covered under Section 07920 JOINT SEALANTS.
3.1.29
Stepped Flashing
Stepped flashing shall be installed where sloping roofs surfaced with
shingles abut vertical surfaces. Separate pieces of base flashing shall be
placed in alternate shingle courses.
3.1.30
Copings
Provide coping using copper sheets 2400 or 3000 mm 8 or 10 feet long joined
by a 20 mm 3/4 inch locked and soldered seam.
Terminate outer edges in
edge strips. Install with sealed [lap joints] [cover plate joints]
[standing seam joints] as indicated.
3.2
PAINTING
Field-paint sheet metal for separation of dissimilar materials.
[Finish
painting is specified in Section 09900 PAINTS AND COATINGS.]
[3.2.1
Aluminum Surfaces
Shall be solvent cleaned and given one coat of zinc-molybdate primer and
one coat of aluminum paint as specified in Section 09900 PAINTS AND
COATINGS.
]3.3
CLEANING
Clean exposed sheet metal work at completion of installation. Remove
grease and oil films, handling marks, contamination from steel wool,
fittings and drilling debris, and scrub-clean. Free the exposed metal
surfaces of dents, creases, waves, scratch marks, and solder or weld marks.
3.4
REPAIRS TO FINISH
Scratches, abrasions, and minor surface defects of finish may be repaired
in accordance with the manufacturer's printed instructions and as approved.
Repair damaged surfaces caused by scratches, blemishes, and variations of
SECTION 07600
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