applied over vapor retarder, where applicable.
2.5
VAPOR RETARDER
**************************************************************************
NOTE: Vapor retarder requirements will be shown on
the drawings when required for local climatic
conditions. In northern climates, where ice and
snow are considerations, a waterproof secondary
membrane may be specified. Delete this paragraph if
not required.
**************************************************************************
Vapor retarder shall be [non-perforated asphalt-saturated organic roofing
felts conforming to ASTM D 226, Type II (No. 30).] [polyethylene sheeting
conforming to ASTM D 4397. A fully compatible tape shall be provided which
has equal or better water vapor control characteristics than the vapor
retarder material.]
2.6
BITUMINOUS COATING
Bituminous coating shall be cold-applied inert-type noncorrosive compound,
nominally free of sulfur components and other deleterious impurities.
2.7
SEALANT
Sealant shall be in accordance with CDA 4115 and manufacturer's
recommendations.
2.8
FASTENERS
**************************************************************************
NOTE: For projects in hurricane areas, edit this
paragraph to provide the higher quality fastener
types recommended.
**************************************************************************
Fasteners in contact with copper shall be copper, brass or Series 300
stainless steel. Fasteners shall be capable of resisting the specified
wind uplift and shall allow for movement of roof panel system. Exposed
fasteners shall be copper and shall only be used at batten caps and
closures.
PART 3
EXECUTION
3.1
INSTALLATION
**************************************************************************
NOTE: Lumber and plywood in contact with copper
will be non-treated or have a "non-corrosive"
fire-retardant treatment.
**************************************************************************
Copper shall be separated from noncompatible metal and corrosive substrates
with permanent type separators recommended by manufacturer. Roofing
panels, flashings and related accessories shall be installed with approved
fasteners in accordance with approved drawings and CDA 4115. Roofing
components shall be set true to line and shall accurately fit together to
form leak-proof joints. Panels shall be folded back to form a hem on
SECTION 07610
Page 9
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