Instructions / Assembly

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1
TRIPLY
®
Design and Application Instructions
Roofing Design Concerns
This list represents the most commonly encountered roofing
situations that can influence the performance of a roofing system.
It is not all inclusive and should not be looked upon as representing all
situations that may be encountered or considered.
1. Drains
a) The use of plastic drains is not recommended and are
not acceptable for installations.
b) A minimum of 2
1
/2 pounds lead sheeting must be
incorporated in the drain flashing design.
c) Drains must have properly installed clamping rings.
2. Pitch Pans
a) The use of pitch pans is not recommended. Pitch pans
are maintenance items that can become nuisances if
ignored or improperly used or installed.
b) Pitch pans are not covered by GAF Materials Corporation
guarantees.
3. Metal Flanged Skylights and Other Roof Top Equipment
a) Due to the differential expansion between metal and
asphalt, large metal flanges are undesirable surfaces to flash
to with BUR and modified bitumen materials.
b) Flashing to these metal flanges is not covered by
GAF Materials Corporation Guarantees.
c) Such units should be mounted on canted wood curbs
at least 8" above the level of the roof.
4. Plumbing Vents
a) The use of primed lead flashing sleeves are required due
to better compatibility between lead and asphalt roofing
systems compared to sheet metal flashing.
b) Lead sleeves on plumbing vents are required.
5. Gravel Stops
a) All gravel stops should be raised to push water to proper
draining locations.
b) The membrane should be nailed to raised perimeter nailers
and counterflashed with metal counter flashing where at all
possible.
c) Where metal gravel stop flanges are flashed to the roof
membrane, leaks caused by metal movement are not covered
by GAF Materials Corporation Guarantees.
6. Air Conditioning Units
a) Where at all possible, install such units at ground level.
b) If such units are to be installed on the roof, they must be
mounted on at least 8" high canted wood curbs or platforms
secured to the structural members of the roof. The curbs
or platforms must be properly flashed and counter flashed.
c) Do not use wood sleepers for supporting these units
directly on the roof membrane. GAF Materials Corporation
Guarantees do not cover leaks caused by units mounted on
sleepers laid directly on the roof membrane.
7. Piping and Conduit on Roof Top
a) Piping and conduit should not be run across a roof.
b) Where no alternative exists, the piping/conduit should be
elevated at least 8" above the surface of the roof on supports
that are secured to the structural roof members or the deck if
light pipes. These supports must allow for the movement of
the pipes and must be flashed with TRIPLYmaterials.
c) Leaks resulting from improper supports are not covered by
GAF Materials Corporation guarantees.
d) Where continuing piping and conduit penetrate the roof, a two
piece, soldered, noncorroding sheet metal sleeve should be
installed in conjunction with a metal umbrella.
8. General Flashing Considerations
a) All flashing must be installed at least 8" above the
immediate roof membrane level.
b) All flashing must be mechanically attached at its top.
c) Counter flashing is required and must extend at least
4' below the top nailing.
d) Counter flashing is not covered by GAF Materials
Corporation Guarantees.
e) Termination bars may only be used in conjunction with an
appropriate counterflashing extending a minimum of 4" below the
termination bar. Fastener spacing must be 4" or 8" as determined
by flashing height as listed in the individual flashing specifications.
9. Coatings
a) Asphalt solvent based coating must not be used on new
granular surfaced rolls.
b) Reapplication of coating must be employed as a part of
periodic maintainance program. The frequency will vary
depending on climatic conditions.
Storage and Inspection of Roofing Materials
TRIPLY roofing materials leave the factory dry and must be maintained
in storage to prevent the materials from getting wet. Provisions must
also be made for storing in a well ventilated, ambient temperature
environment out of the weather. Water based coatings must be protected
from freezing.
At the job site, no more material should be stored than will be used
within two weeks, It should be stored on pallets, roll goods on end, in a
well ventilated area. Where dry inside storage is not possible (such as
where new concrete floors or extensive plastering results in a high
humidity), storage under secured canvas tarpaulins in a well ventilated
area is acceptable for periods up to two weeks. For periods longer than
two weeks, the materials should be properly warehoused, i.e., dry, venti-
lated on pallets etc. Polyethylene covers are unacceptable field covers.
Rooftop storage of roofing should be on pallets, rolls on end, and pro-
tected with properly secured vapor permeable covers such as canvas tar-
paulins. No more material should be stored on the roof than can be used
within five days. When prolonged inclement weather threatens, i.e., rainy
seasons, no more roofing materials should be supplied to the rooftop
than can be used within two days.
In the unlikely event that obviously defective or damaged material
reaches the job site or damage to the material occurs from improper
storage on the job site, it is the responsibility of the roofing contractor not
to install this material. In the case of material that has obvious manufac-
turing defects, GAF Materials Corporation should be notified immediately
so replacement material can be supplied if the complaint is justified.
Installation of defective material can result in additional costs above the
cost of supplying replacement material. Iftheroofingcontractorchooses
toinstallmaterial withobvious defects, this added cost is not the respon-
sibility of GAF Materials Corporation.
Condition and Preparation of Roof Deck Surface
All open edges must have wood nailers. On steel or concrete roof
decks of any kind, use treated wood nailers along all open or flush eaves so
that gravel-stops or edging strips may be securely nailed. Wood nailers
may also be needed at other projections through the roof.
Prime masonry and metal surfaces to receive a mopping of Roofing
Asphalt with Asphalt/Concrete Primer and allow to dry
thoroughly.
The surface of a roof deck should be dry, firm, smooth, and free
of dirt and loose material. It is the responsibility of the roofing
contractor, deck contractor, and owner’s representative to determine
the suitability of the roof deck surface to receive the roof assembly.