Instructions / Assembly

STEP 1
Preparing for a LIBERTY
™
One (1) Ply Roof System
Installation
• Remove All Existing Roofs… and inspect
the roof deck to determine its suitability
and type of preparation required, replacing
damaged deck materials as necessary.
Minimum 4-ply, 15/32" (12 mm) exterior-
grade plywood decking is required. Each
plywood panel must be installed so that all
four sides are on, and are secured to, joists
and cross blocking. Contact GAF Technical
Services at 1-800-ROOF-411 for more
information on other deck types that may
be acceptable.
• Poor Roof Drainage… can lead to leaks
at the seams. Before installation, fix the roof
deck at locations where water remains after
48 hours.
STEP 2
Priming the Roof Deck
• Prime the Deck… by applying an ASTM
D41-type asphalt primer as the base
foundation coat to ensure proper adhesion
of the LIBERTY
™
SBS Self-Adhering Cap
Sheet. Prior to priming, tape all plywood
joints with duct tape. Prime plywood deck
with ½ gallon per 100 sq. ft. (0.20 liters/
100 m
2
) and allow primer to dry.
STEP 3
Installing Edge Flashing
• Install Edge Flashing… at all eave and
rake edges in a 1/8" (3.1 mm) bed of
roofing cement and fasten with two rows of
roofing nails staggered 3" (76.2 mm) o.c.
Prime the top of the edge metal and allow
to dry before installing LIBERTY
™
SBS Self-
Adhering Cap Sheet.
STEP 4
Installing LIBERTY
™
SBS
Self-Adhering Cap Sheet
1. Cut the first LIBERTY
™
SBS Self-Adhering
Cap Sheet to a manageable length.
2. Align at the lowest edge of the roof,
overlapping and flush with the outer
edge of the drip edge.
3. The LIBERTY
™
Cap Sheet must be
positioned with the selvage edge at the
high side of the roof.
4. Prime metal drip edge and any other
metal to be covered with LIBERTY
Cap Sheet.
5. Fold back the top half of the LIBERTY
™
Cap Sheet and remove the split release
film (upper half only) from the underside
of the Cap Sheet.
6. Gradually set the upper LIBERTY
™
Cap
Sheet back into place by “rolling,” not
“flopping”… making sure that the lower
edge remains aligned with the drip edge.
DO NOT REMOVE THE SELVAGE FILM.
7. Roll the lower portion of the LIBERTY
™
Cap Sheet back, and apply a light
troweling of SBS Flashing Cement to the
primed metal drip edge and any other
primed flashing metal to be covered with
the Cap Sheet.
8. Remove the release film from the folded-
back LIBERTY
™
Cap Sheet. Gradually
“roll” the Cap Sheet back into place,
making sure it aligns with the metal
drip edge.
9. Using a weighted roller, apply even
pressure over the entire area of the
LIBERTY
™
Cap Sheet (rolling from center
to outer edges) to eliminate air bubbles
or wrinkles.
10. If an additional length of LIBERTY
™
Cap
Sheet is needed to continue across the
roof, align the next sheet of LIBERTY
™
Cap Sheet so as to overlap the previous
Cap Sheet a minimum of 6" (152 mm).
Install as above, except do not adhere
the Cap Sheet in the overlap area. Clip
the leading edge of the selvage edge
at a 45° angle to provide a better T-joint
overlap of the next course. Note: If these
seams occur in consecutive courses,
offset the laps at least 18" (457 mm).
11. Apply a light troweling of SBS Flashing
Cement to the 39 3/8" x 6" (1 m x 152
mm) end lap and set the overlap back
into place.
12. Firmly roll the overlap area as well
as the entire remaining LIBERTY
™
Cap Sheet.
13. Set the next and subsequent courses
of LIBERTY
™
Cap Sheet positioned to
overlap 4" (102 mm) of the previous
course. Make sure each subsequent
course overlaps the selvage edge flush
to the bottom edge of the release film
on the previous course.
14. Fold the upper edge of the LIBERTY
™
Cap Sheet back onto itself, exposing
one half of the split-back release film.
Remove the release film and gradually
“roll” the Cap Sheet back into place.
15. Remove the selvage edge release film
from the lap area.
16. Back-nail LIBERTY
™
Cap Sheets on
slopes of 1:12 or higher. In the middle of
the 4" (102 mm) wide selvage edge, nail
on 9" (229 mm) centers, using roofing
nails of sufficient length to penetrate
though the deck.
17. Going back to the overlapping LIBERTY
™
Cap Sheet, remove the release film and
“roll” the Cap Sheet into place over the
primed deck, and then overlap the lower
LIBERTY
™
Cap Sheet selvage edge.
18. Using a weighted roller, apply even
pressure over the entire roof area of the
LIBERTY
™
Cap Sheet (from center to
edges) to eliminate air bubbles or
wrinkles. Thoroughly roll all laps to
ensure proper adhesion.
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