**************************************************************************
NOTE: Include venting provision for wet fill
substrate materials like lightweight cellular
concrete.
**************************************************************************
[
j.
Venting is provided in accordance with the following:
[
(1) Edge Venting: Perimeter nailers are kerfed across the width
of the nailers to permit escape of gaseous pressure at roof edges.]
[
(2) Underside Venting: Vent openings are provided in steel form
decking for cast-in-place concrete substrate.]
[
(3) Vapor pressure relief vents: Holes equal to the outside
diameter of vents are provided through the insulation where vents
are required. Space vents in accordance with membrane
manfacturer's recommendations.]]
[
k.
Exposed nail heads in wood substrates are properly set. Warped
and split [boards] [sheets] have been replaced. There are no
cracks or end joints 6 mm (1/4 inch) in width or greater. [Joints
in plywood substrates are taped or otherwise sealed to prevent air
leakage from the underside.]]
[
l. Insulation boards are installed smoothly and evenly, and are not
broken, cracked, or curled. There are no gaps in insulation board
joints exceeding 6 mm (1/4 inch) in width. Insulation is attached
as specified in Section 07220 ROOF AND DECK INSULATION.
Insulation is being roofed over on the same day the insulation is
installed.]
3.2
APPLICATION
**************************************************************************
NOTE: Coordinate application method with paragraphs
"Description of Roof Membrane System" and
appropriate subparagraph under "EPDM Sheet Roofing".
**************************************************************************
Apply entire EPDM sheet utilizing [fully adhered] [loose-laid ballasted]
[mechanically fastened] [combined fully adhered and mechanically fastened]
application method[s]. Apply roofing materials as specified herein unless
approved otherwise by the Contracting Officer.
3.2.1
Special Precautions
a.
Do not dilute coatings or sealants unless specifically recommended
by the materials manufacturer's printed application instructions.
Do not thin liquid materials with cleaners used for cleaning EPDM
sheet.
b.
Keep liquids in airtight containers, and keep containers closed
except when removing materials.
c.
Use liquid components, including adhesives, within their shelf
life period. Store adhesives at 15 to 27 degrees C (60 to 80
degrees F) prior to use. Avoid excessive adhesive application and
adhesive spills, as they can be destructive to some elastomeric
SECTION 07530
Page 21
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