Installation Instructions

Installation Instructions:
Caution: Always follow Safety Instruction, Building Codes and Safe Work Practices issues by
the local Govt. bodies (e.g. OSHA / WCB)
PLATINUM HT-SA must be covered by a primary roof (Asphalt & Synthetic Shingles, Metal Roofing, Tiles,
Slate, and Cedar Shakes hould be installed on a dry deck when the ) within 180 days. For best results sHT-SA
air, membrane, and substrate temperature is over 40°F (4.4°C). Priming is not required for attaching to wood
deck when the temperature is above 40°F. Concrete and masonry decks should be primed with a solvent or a
water based primer that meets ASTM D41 for asphalt based self-adhesive membranes.
For cold weather applications below 40°F (4.4°C) a primer should be used and the laps blind nailed. Blind nail
with 3/8” head roofing nails of 1” or longer in the 3” over lap area.
HT-SA is recommend for roof slope applications 2:12 and above. For steep slope applications (6:12 or greater)
or when installing at temperatures greater than 100°F (38°C) it is recommended to blind nail the overlap area
as instructed above for cold weather applications.
HT-SA is to be laid out horizontally (parallel) to the eave with the printed side up, using 3" side laps and 6" end
laps.
HT-SA may also be installed vertically. For vertical installation anchor with 3/8” head roofing nails along the
upper most edge 3 inches down with 6 equally spaced nails across the 36” width. Ensure roofing nails are
perpendicular to the roof deck so that the head lays flat and seals well to the top surface of the HT-SA using 3"
side laps and 6" end laps.
Always work from the low point to the high point of the roof. Apply the membrane in valleys before the
membrane is applied to the eaves.
Cut to manageable lengths and position parallel to the edge of the roof. Peel back one side of the split HT-SA
release sheet approximately 4 in (10 cm) then apply as positioned to the roof deck. Continue peeling back one
side of the split release sheet. Press down on with a small rubber roller to increase adhesion to the roof HT-SA
deck. Peel back the remaining half of the split release liner and press down on the to adhere to the roof HT-SA
deck again using a small roller to improve adhesion.
For eave installation should be applied over the metal drip edge at the eave. Do not fold over HT-SA HT-SA
the roof edge unless the edge is subsequently covered over by a drip edge or other flashing material. It is
recommended that extend from the eave up the roof to a point 24” inside the exterior wall. This should HT-SA
be above the maximum ice dam buildup line in most areas. Consult your local building code for specific
requirements.
For high elevation, high wind or wind driven rain it is recommended to cover the entire roof deck with HT-SA.
Safety Notification:
FT Synthetics products are designed with the GRIPSPOT™ technology for better skid protection for the roofer
but product may become slippery due to high moisture, frost, rain, water, dust, debris or other conditions. Use
precautions when working on the roof. Follow all local and federal safety codes when installing any roofing
system including FT Synthetics products. Failure to adhere to those procedures may result in serious injury or
even death.
Self Adhering Synthetic Roofing Underlayment
PLATINUM HT-SA
FT SYNTHETICS
Toll Free Ph: 1-844-353-9839
Phone: 604-594-3439
Fax: 604-594-3589
www.ftsyn.com
13120 76th Avenue
Surrey BC V3W 2V6
Canada
Rev091417

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