Flex TPO Extension Legs - Manual (Page 2)

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Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533
Tel: (610) 916-9500 Fax: (610) 916-9501 www.FlexRoofingSystems.com
Page 2
6. Position the molded pocket and extension legs so the vertical overlap is against the penetration.
This will allow proper pressure to be applied with the 2-inch silicone roller.
7. Weld all the vertical overlaps starting at the angle change and progressing to the top of the pocket.
8. Make tack-welds on all four sides of the pocket to hold it in place.
9. Weld the entire horizontal flange of the molded pocket and extension legs to the deck membrane.
Crease all step-offs with the edge of the silicone roller to avoid water channeling.
10. Using a seam probe, check all splices for voids and cold-welds. Make any needed repairs.
11. Apply a thin coat of Primer to the TPO membrane, penetration(s) and around the top rim of the
pocket using a small paint brush. Do not apply Primer to the galvanized metal surface utilized
on the inside of the extension leg.
12. Fill the pocket with Thermoplastic One-Part Sealant. Use an adequate amount of sealant to ensure
that contact is made with the top rim of the pocket. One set of Flex TPO Extension Legs welded
to a Flex TPO Molded Pocket will require 1 gallon (3.785 liters) of sealant to fill the extended
pocket.
CAUTIONS AND WARNINGS
· The walls of the Flex TPO Extension Legs and Sealant Pockets must be a minimum of one-inch
from any penetration.
· Flex TPO Extension Legs are designed to fit both sides of the Sealant Pocket without having a
designated left or right part.
· Clean Flex TPO Extension Legs, Sealant Pocket, TPO membrane and the penetration(s) prior to
use with Flex Weathered Membrane Cleaner. Primer pads must be used if the membrane has been
exposed for an extended period of time. Apply Primer to the TPO membrane and
penetration(s) surfaces only. Do not apply primer to the galvanized metal surface utilized on
the inside of the extension leg.