Discs shall be formed to prevent dishing or cupping.
[2.11
PRE-MANUFACTURED ACCESSORIES
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NOTE: Edit, delete, and insert accessory materials
requirements as required for the specific project
and components to be installed.
**************************************************************************
Pre-manufactured accessories shall be manufacturer's standard for intended
purpose,[ comply with applicable specification section,] compatible with
the membrane roof system and approved for use by the roof membrane
manufacturer.
[2.11.1
Vapor Pressure Relief Vents
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NOTE: Venting of roof insulation may be advisable
when vapor retarder is provided beneath insulation
or in recover projects when the old roof membrane
remains intact. The vapor retarder should be
specified in Section 07220 ROOF AND DECK INSULATION.
Coordinate with Section 06100 ROUGH CARPENTRY, to
ensure that kerfed wood nailers are specified at
edge of roof insulation and placed around periphery.
For roofs requiring venting that are more than 12
meters (40 feet wide), stack venting should be
provided to supplement edge venting. Underside
ventilation for steel decks should consist of
continuous openings 3 mm to 5 mm (1/8 to 3/16 inch)
wide between adjacent deck units. Coordinate these
requirements with appropriate specification sections.
**************************************************************************
Vents shall be manufactured for the purpose of releasing vapor pressure
from the roofing system by heat and pressure. Vents shall be one-way type
design to prevent reverse flow of moisture laden air into roofing system.
Valve cap shall effectively seal out wind-blown rain and snow and shall not
permit water entry if submerged.
][2.11.2
Pre-fabricated Curbs
Curbs shall be [_____] gauge [G90 galvanized][AZ55 galvalume][_____] with
minimum 100 mm (4 inch) flange for attachment to roof nailers. Curbs shall
provide minimum height of 250 mm (10 inches) above the finished roof
membrane surface.
][2.11.3
Elevated Metal [Walkways] [and] [Platforms]
As specified in Section 05500 METAL: MISCELLANEOUS AND FABRICATIONS.
]][2.12
WALKPADS
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NOTE: Use walkpads as walkways and at roof access
points and where the roof or areas of the roof are
intended to bear foot traffic for maintenance or
other purposes once a month or more frequently.
SECTION 07511
Page 17
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