Instructions / Assembly
3
Roof sheathing is a plywood or OSB (oriented strandboard)
layer on top of the roof supports, and is required to support
ONDURA-6V. We recommend using standard felt paper or an
ice water shield over the sheathing.
While stored at the job site, ONDURA-6V sheets must be
covered to protect from damage that may be caused by
rainwater trapped between sheets. Do not allow stacked
sheets to get wet while stored.
ONDURA-6V sheets are 44 inches wide and 79 inches long. We
recommend an overhang at the roof eave of 1 to 1-3/4 inches
(Note: 1-3/4 inches is the maximum overhang relave to the
edge of the roof sheathing). Five sheets provide 100 square feet
of roof coverage. Measure the roof from eave to ridge and add
the overhang length to determine the total length of coverage.
If the total length of coverage is greater than 79 inches, then
you will need a second row of ONDURA-6V sheets. The sheet
overlap from row to row should be at least 7 inches.
The slope of the roof can be calculated from measurements
of the rise and run of the roof. The rise is the vercal distance
of the ridge above the eave. The run is the horizontal distance
of the ridge from the eave. A roof slope is oen stated as the
inches of vercal rise per 12 inches of horizontal run length. The
minimum appropriate slope for an ONDURA-6V roof is a 3 inch
rise over a 12 inch run.
Always wear eye protecon when cung.
n To cut an ONDURA-6V sheet parallel to the corrugaons,
use a ulity knife with a sharp blade. Always cut sheets in
the valley of a corrugaon with the painted side up.
n To cut an ONDURA-6V sheet perpendicular to the
corrugaons, use a circular saw or a hand saw. Apply a
lubricang oil on the saw blade to aide in a smoother cut.
For best results, work with the painted
side down and mark the cut line with
a pencil on the unpainted side.
Cut through the valley with ulity knife.
Slope = amount of rise per run
Example: 3-in rise per
12-in run = 3:12
Minimum slope required: 3:12
Run
Rise
Slope
Ridge
Eave
The rake edge of the roof should be covered to prevent water
intrusion or damage to the sheathing. Run felt paper to
rake edge of sheathing, and refer to the suggested rake trim
soluons found in the Installaon Stage of this guide.
Drip edge ashing
on top of felt paper
on rake
Felt paper
Drip edge ashing
under felt paper
on eave
Note: At the ridge of the roof the gap across the ridge, between
the upper ends of the ONDURA-6V sheets on each side of the
roof, will be covered by the ridge cap; and the gap should be no
more than two inches.
If your roof is wider than 44 inches, then you will need
to account for the single corrugaon overlap for adjacent
ONDURA-6V sheets. The rst ONDURA-6V sheet will provide
44 inches of coverage. Each addional ONDURA-6V sheet will
provide 40 inches of coverage with one corrugaon overlap.