3.03
3.04
3.05
INSULATION PLACEMENT
A. Install insulation or membrane underlayment over the substrate with boards butted tightly together with no
joints or gaps greater than 1/4 inch. Stagger joints both horizontally and vertically if multiple layers are
provided.
MEMBRANE PLACEMENT AND BONDING
A. Unroll and position membrane without stretching. Allow the membrane to relax for approximately 1/2 hour
before bonding. Fold the sheet back onto itself so half the underside of the membrane is exposed.
B. Apply the Bonding Adhesive in accordance with the manufacturer’s published instructions and coverage
rates, to both the underside of the membrane and the substrate. Allow the adhesive to dry until it is tacky but
will not string or stick to a dry finger touch.
1. Roll the coated membrane into the coated substrate while avoiding wrinkles. Brush down the bonded
half of the membrane sheet with a soft bristle push broom to achieve maximum contact.
2. Fold back the unbonded half of the membrane sheet and repeat the bonding procedure.
C. Install adjoining membrane sheets in the same manner, overlapping edges approximately 4 inches. Do not
apply bonding adhesive to the splice area.
MEMBRANE SPLICING
A. Position membrane sheet to allow for required splice overlap. Mark the bottom sheets with an indelible
marker approximately 1/4” to 1/2” from the top sheet edge. The pre-marked line on the membrane edge can
also be used as a guide for positioning splice tape.
B. When the membrane is contaminated with dirt, fold the top sheet back and clean the dry splice area (minimum
3” wide) of both membrane sheets by scrubbing with clean natural fiber rags saturated with Sure-Seal
Weathered Membrane Cleaner. When using Sure-Seal (black) PRE-KLEENED membrane, cleaning the
splice area is not required unless contaminated with field dirt or other residue.
C. Apply EPDM Primer to splice area and permit to flash off.
D. When adhering Factory Applied Tape (FAT), pull the poly backing from FAT beneath the top sheet and
allow the top sheet to fall freely onto the exposed primed surface. Press top sheet on to the bottom sheet using
firm even hand pressure across the splice towards the splice edge
E. For end laps, apply 3” or 6” SecurTAPE to the primed membrane surface in accordance with the
manufacturer’s specifications. Remove the poly backing and roll the top sheet onto the mating surface.
F. Tape splices must be a minimum of 2-1/2” wide using 3” wide SecurTAPE extending 1/8” minimum to 1/2”
maximum beyond the splice edge. Field splices at roof drains must be located outside the drain sump.
Note: For projects where a 90-mil membrane OR 20-year or longer System Warranty is specified, splice
enhancements are required. Refer to Carlisle Sure-Seal/Sure-White Roofing System Specificaiton.
G. Immediately roll the splice using positive pressure when using a 2” wide steel roller. Roll across the splice
edge, not parallel to it. When FAT is used, Carlisle’s Stand-Up Seam Roller can be used to roll parallel to
the splice edge.
H. At all field splice intersections, apply Lap Sealant along the edge of the membrane splice to cover the
exposed SecurTAPE 2” in each direction from the splice intersection. Install Carlisle’s Pressure-Sensitive
“T” Joint Covers or a 6” wide section (with rounded comers) of Sure-Seal Pressure-Sensitive Elastoform
