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Insulation, facer material, and attachment shall be compatible with metal
roof system application specified, as approved by the roof panel
manufacturer, and as specified in Section [_____].
]PART 3
EXECUTION
3.1
EXAMINATION
Examine surfaces to receive metal roof panel and flashing installation.
Ensure surfaces are suitable, dry and fee of defects and projections which
might affect the installation.
3.2
INSTALLATION
Installation shall meet specified requirements and be in accordance with
the manufacturer's installation instructions and approved shop drawings.
Correct defects or errors in materials and installation. Do not install
damaged materials. Dissimilar materials which are not compatible when
contacting each other shall be insulated by means of gaskets or insulating
compounds. Exposed surfaces and edges shall be kept clean and free from
sealant, metal cuttings, hazardous burrs, and other foreign material.
Stained, discolored, or damaged materials shall be removed from the site.
3.2.1
Underlayment
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NOTE: Coordinate underlayment application with
materials specification in Part 2.
Show the extent and location of the appropriate
underlayments on the drawings. The underlayment
must ensure that any water penetrating below the
roof panels will drain outside of the building
envelope.
Include the bracketed option related to ice dam
protection where ice damming is a concern.
Include the bracketed option in the last sentence
when felt underlayment is used.
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Install underlayment parallel to roof slope and in a watershedding fashion.
[Install self-adhering underlayment [EPDM underlayment] in accordance with
manufacturer's instructions.] [Self-adhering underlayment may be installed
parallel to roof slope with the approval of the Contracting Officer.]
[Provide a minimum 1 meter (36 inch) wide sheet of self-adhering modified
bitumen membrane underlayment at all penetrations, eaves, rakes, hips,
ridges, valleys, slope transitions, and side wall and head wall
transitions.] [Ice dam protection shall extend minimum 36 inches inside of
building wall line and as otherwise necessary to provide effective
protection from water intrusion due to ice daming.] Turn underlayment up
minimum 4 inches at vertical transitions, except as otherwise indicated.
Underlayment shall be concealed by finished flashing and cladding
construction. Ensure underlayment is attached [with 25 mm (1 inch) cap
nails] in a manner to hold in place until metal roof panels are installed.
The underlayment shall ensure that any water that penetrates below the
SECTION 07412
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