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Roof walkpads shall be polyester reinforced, granule-surfaced modified
bitumen membrane material, ASTM D 6162 or ASTM D 6164, minimum [ ] [5 mm]
([
][200] mils) thick, compatible with the roof membrane and as
recommended by the roof membrane manufacturer. Panels shall not exceed 1.2
meters (4 feet) in length. Other walkpad materials require approval of the
Contracting Officer prior to installation.
][2.13
PAVER BLOCKS
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NOTE: Use concrete pavers as walkways on aggregate
surface roofs 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. Use
paver blocks under heavy bearing components,
irregular base bearings and for support and
attachment of lightweight pipe, conduit, and
drainage lines routed along roof surface.
**************************************************************************
Precast concrete, minimum 38 mm (1-1/2 inch thick), minimum 450 mm (18
inches) square for walkways and minimum 150 mm by 300 mm (6-inch by
12-inch) for use in supporting surface bearing components but extending not
less than 50 mm (2 inches) beyond all sides of surface bearing bases.
Install walkpad material under all paver blocks.
][2.14
ROOF INSULATION BELOW MODIFIED BITUMEN MEMBRANE SYSTEM
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NOTE: If the roofing system contains insulation,
coordinate with the appropriate insulation
specification section. The insulation specification
should include materials and installation up to the
substrate on which the roof membrane base sheet and
or membrane layers are to be installed. Coordinate
base sheet attachment (mechanically fastened or
mopped) with FM or UL fire and wind uplift
requirements.
**************************************************************************
Insulation shall be compatible with the roof membrane, approved by the
membrane manufacturer and as specified in Section 07220 ROOF AND DECK
INSULATION.
]2.15
MEMBRANE LINER
Self-adhering modified bitumen underlayment conforming to ASTM D 1970, EPDM
membrane liner conforming to ASTM D 4637, or other waterproof membrane
liner material as approved by the Contracting Officer.
PART 3
EXECUTION
3.1
VERIFICATION OF CONDITIONS
Before applying roofing materials, ensure that the following exist:
a.
[Drains,] [curbs,] [cants,] [control joints,] [expansion joints,]
SECTION 07511
Page 18
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