VAPOR BARRIER
CONTINUITY
Easy-Ply Roof Decking is laminated with a decorative 6 mil vinyl
which is a vapor barrier and interior finish. Not recommended
over swimming pools or similar areas.
ALL BUTT JOINTS
MUST FALL
ON FRAMING
MEMBERS |
The following instructions for priming, caulking and sealing must
be followed to assure complete vapor barrier continuity. To assure
optimum effectiveness of the Roof Decking vapor barrier, ALL
joints, and holes for chimneys, vents or other openings cut through
the Roof Decking, must be properly sealed. Proper sealing is
simple and can be conducted during the normal procedure of
installing the Roof Decking.
(1) |
Apply a good grade primer to the ends
of each panel before application. Keep
paint off film. If necessary, wipe clean
with mineral spirits. |
|
(2) |
On bulb-T framing, apply a good grade
primer to long edges. Keep paint off film.
If necessary, wipe clean with mineral
spirits. |
(3) |
Apply a good grade primer to all cut
edges and holes. |
(4) |
Caulk with a good grade sealant.
a. |
Apply a continuous bead of caulking
to the T&G groove. |
b. |
Apply a continuous bead of caulking
to the squared ends. Gap butt ends
1/8". Trim ends if necessary. All butt
joints must fall on framing members. |
|
c. |
Fill voids around cutouts with
insulation and caulk-seal at ridge,
around chimney, vents or other
openings. |
|
(5) |
Assure continuity of vapor barrier, by
taking special care in handling panels to
avoid damaging or puncturing vapor
barrier finish films.
|
INSTALLATION
INSTRUCTIONS
Preparation - Avoid marring or soiling of factory-finished panels.
In exposed beam construction, apply masking paper to tops of
beams before installing Roof Decking. After painting or staining
beams, remove masking by slitting on each side of beam (See
Fig. 3). If beams are finished before Roof Decking is applied,
wipe away paint or stain runover from beam tops and allow to dry
thoroughly before applying roof decking.
Sawing -Saw cuts are made easily with handsaws or power
saws. Keep finished (ceiling) side face up for handsaws, face
down for power saws. (See Fig. 4)
Nailing-Nail directly to wood rafters, or beams, with nails
specified in rafter spacing table. Nail from panel center out to
ends, using five nails per rafter. (Check table.) Keep nails back
3/4 " from edges. (See Fig. 5)
Installation -Starting at low or outside edge of roof, lay entire first
course at right angle to framing with tongue pointing up to ridge
and finished (ceiling) side down on rafters. Provide a 1/8" gap for
caulking between end joints. Install second and following courses
with butt joints on alternate rafters. Fit T & G snug. Stagger all
panels.
Panel ends must not project beyond framing at roof edges. If
decking is used as overhang, it must be supported at all outside
edges and/or ends with additional framing members.
Finishing - Cut Roof Decking to fit at ridge, around chimneys and
other projections according to local code requirements for wood
construction. Cut edges should be caulked and open areas filled
with approved insulation. Cap ridge and finish other openings with
flashing.
BUILDING CODE COMPLIANCES
& TEST DATA
F.H.A. Material Release No. 1150/c
B.O.C.A. Report No. 84-65
S.B.C.C. Report No. 9590
I.C.B.O. Report No. 1016
U. Miami Wind Up-Lift Test No. 1278
Test March 1963, April 1963 and April 1964
References: Pennsylvania State University
Flame Spread-Class III (or C) |
RAFTER SPACING AND NAIL REQUIREMENTS
ROOF DECKING
THICKNESS |
RAFTER OR
PURLIN
SPACING FOR
ALLOWABLE
LIVE LOAD OF: * |
NAILS, GALV.
COMMON |
PROFILE CLIP
TO BAR JOISTS |
50 pst |
Nail Size |
|
1" |
24" o.c. |
6 d. |
NA |
1 3/8" |
32" o.c. |
8 d. |
6380 |
1 7/8" |
48" o.c. |
10 d. |
6780 |
2 1/16" |
48" o.c. |
16 d. |
6780 |
*Spans are limited by 1/180 deflection expressed in lbs. per square toot
of roof area projected on a horizontal plane and over two or more
spans. 10 pst dead load assumed.
Start at middle of panel and drive 5 nails, equally spaced (4 1/2" o.c.).
Alternately nail into rafters right and left of center. Keep nails back 3/4' from
edges, toenailing if necessary.
