PART 3
EXECUTION
3.1
EXAMINATION
Ensure that the following conditions exist prior to application of the
roofing materials:
a.
[Drains,] [curbs,] [control joints,] [expansion joints,]
[perimeter walls,] [roof penetrating components,] [and] [equipment
supports] are in place.
b.
Surfaces are rigid, clean, dry, smooth, and free from cracks,
holes, and sharp changes in elevation.
c.
The plane of the substrate does not vary more than 6 mm (1/4 inch)
within an area 3 by 3 meters (10 by 10 feet) when checked with a 3
meter (10 foot) straight edge placed anywhere on the substrate.
d.
Substrate is sloped to provide positive drainage.
e.
Walls and vertical surfaces are constructed to receive
counterflashing, and will permit mechanical fastening of the base
flashing materials.
f. Treated wood nailers are in place on non-nailable surfaces, to
permit nailing of base flashing at minimum height of 8 inches
above finished roofing surface.
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NOTE: Coordinate with Section 06100 ROUGH CARPENTRY
to ensure that preservative treatment is specified
for wood which will be in contact with roofing
components.
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g. Pressure-preservative treated wood nailers are fastened in place at
eaves, gable ends, openings, and intersections with vertical
surfaces for securing of membrane, edging strips, attachment
flanges of sheet metal, and roof fixtures. [Embedded nailers are
flush with deck surfaces.] [Surface-applied nailers are the same
thickness as the roof insulation.]
h. Avoid contact of EPDM materials with fire retardant treated wood,
except as approved by the roof membrane manufacturer and
Contracting Officer.
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NOTE: Wood cants should also be used where there
are non-wall supported flashings at wood blocking
forming area dividers and expansion joints, and at
wall and roof intersections where roof deck is not
supported on wall.
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i.
Cants are securely fastened in place in the angles formed by walls
and other vertical surfaces. The angle of the cant is 45 degrees
and the height of the vertical leg is not less than 89 mm (3-1/2
inches).
SECTION 07530
Page 20
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