3.9.6 BALLAST
Show ballast types and weight(s) on roof plans and describe in detail in
project specifications. See VA Master Construction Specifications, Section
07570, "Pavers and Aggregate Roof Ballast" for guidance.
3.9.7 BASE FLASHING AND PENETRATIONS
Use 200 mm (8 in.) high base flashing at walls and penetrations. Do not use
pitch pockets or similar penetration seals.
3.9.8 SCUPPERS
Locate overflow scuppers in parapet walls at top of membrane so that ponding
does not exceed high point of slopes.
3.9.9 PROVISION FOR FUTURE VERTICAL EXPANSION
Where the roof deck is to become a future floor slab, design the roof system
as follows:
Topic 12, "Future Vertical Expansion".
3.9.9.2 Provide a separation between the roof system and the roof deck
(future floor slab).
3.9.9.3 Design for easy removal of the roofing system down to the roof deck.
3.9.9.4 Detail connections for future columns and exterior walls to prevent
water infiltration into the roof system.
3.10 EXTERIOR INSULATION FINISH SYSTEM
If an exterior insulation finish system (EIFS) is used for the exterior
finish, use only "Drainable" type. Sheathing shall be concrete backer board.
3.11 STRUCTURAL STEEL ANGLE GUARDS
Provide structural steel angle guards, protected from corrosion by painting
or galvanizing, for exterior use in the paths of motor vehicle traffic to the
loading dock and at exposed corners on the platform.
ARCHITECTURAL DESIGN MANUAL
3-9
BUILDING ENVELOPE
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