3.3.1
Phased Membrane Construction
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NOTE: Include bracketed option only when
granule-surfaced modified bitumen cap sheet is
specified as the built-up roof surfacing.
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Phased application of membrane plies is prohibited. [Any delay in modified
bitumen cap sheet installation shall result in thorough cleaning of the
applied membrane material surface and drying immediately prior to cap sheet
installation. Priming of the applied membrane surface may be required at
the discretion of the Contracting Officer prior to cap sheet installation.]
[3.3.2
Temporary Roofing and Flashing
Provide watertight temporary roofing and flashing where considerable work
by other trades, such as installing [cooling towers,] [antennas,] [pipes,]
[ducts,] [_____,] is to be performed on the roof or where construction
scheduling or weather conditions require protection of building interior
before permanent roofing system can be installed. Do not install temporary
roofing over permanently installed insulation. Provide rigid pads for
traffic over temporary roofing.
3.3.2.1
Removal
Completely remove temporary roofing and flashing before continuing with
application of permanent roofing system.
][3.3.3
Base Sheet Application - General
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NOTE: Include this paragraph when either base sheet
or ventilating base sheet is specified in paragraph
entitled "Description of Roof Membrane System."
Mechanically fastened base sheets are required when
uninsulated roof membrane system is to be applied
directly to nailable decks, excluding steel deck.
Ventilating base sheet is required when roof
membrane is applied directly to wet fill deck
materials like lightweight insulating or cellular
concrete and gypsum fill, and when applied over new
poured concrete decks.
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NOTE: Select the applicable application method.
Delete other options.
Delete requirements for adhered base sheets where
the sheet is to be mechanically fastened through to
nailable deck.
Apply base sheets at right angles to roof slope,
except on insulated roofs where nailers (insulation
stops) have been applied at right angles to slope
and on decks sloped 1:12 (one inch per foot) or
SECTION 07511
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