manufacturer. Apply splice adhesive with a 75 mm to 100 mm (3 inch to 4
inch) wide, 13 mm (1/2 inch) thick, solvent-resistant brush in a smooth,
even coat with long brush strokes. Bleed out brush marks. Do not apply
adhesive in a circular motion. Simultaneously apply adhesive to both
mating surfaces in an approximate 0.63 mm to 0.75 mm (0.025 to 0.030 inch)
wet film thickness, or other thickness as recommended by the roof membrane
manufacturer's printed instructions. Allow the splice adhesive to set-up
in accordance with membrane manufacturer's instructions. Perform
manufacturer recommended field check to test for adhesive readiness prior
to closing seam. Apply a 3 mm to 6 mm (1/8 to 1/4 inch) bead of in-seam
sealant approximately 13 mm (1/2 inch) from the inside edge of the lower
membrane sheet prior to closing the seam. Ensure the in-seam sealant does
not extend onto the splice adhesive. Maintain the full adhered seam width
required. Roll the top membrane onto the mating surface. Roll the seam
area with a 50 mm to 75 mm (2 inch to 3 inch) wide, smooth silcone or steel
hand roller. A minimum of 2 hours after joining sheets and when the lap
edge is dry, clean the lap edge with membrane manufacturer recommended
cleaner and apply a 6mm to 9 mm (1/4 inch to 3/8 inch) bead of lap sealant
centered on the seam edge. With a feathering tool, immediately feather the
lap sealant to completely cover the splice edge, leaving a mound of sealant
over the seam edge. Lap sealant shall be applied to all adhesive formed
seams.
]3.2.6
Perimeter Attachment
**************************************************************************
NOTE: All application methods of EPDM membranes
require mechanical fastening of the membrane to wood
nailers at the roof perimeters, at angular
penetrations, or at circular penetrations, except
roof drains greater than 18 inches in diameter.
**************************************************************************
Adhesive bond or mechanically secure roof membrane sheet at roof perimeter
in a manner to comply with wind resistance requirements and in accordance
with membrane manufacturer's printed application instructions. When
adhesively bonding a mechanically fastened system in perimeter areas, the
perimeter boundary of the adhesive bond shall be the same as the boundary
required for additional perimeter mechanical fastening to meet wind
resistance requirements.
3.2.7
Securement at Base Tie-In Conditions
Mechanically fasten the roof membrane at penetrations, at base of curbs and
walls, and at all locations where the membrane turns and angle greater than
4 degrees (1:12). Space fasteners a maximum of 12 inches on center, except
where more frequent attachment is required to meet specified wind
resistance or where recommended by the roof membrane manufacturer. Flash
over fasteners with a fully adhered layer of material as recommended by the
roof membrane manufacturer's printed data.
3.2.8
Membrane Flashing
**************************************************************************
NOTE: Coordinate flashing requirements with Section
07600 and details. Ensure Section 07600 is properly
edited for application to EPDM roofing systems and
for inclusion of flashing conditions of the project.
**************************************************************************
SECTION 07530
Page 25
Previous Page
