Instructions / Assembly

INSTALLATION STAGE
Fastener Positioning
Genuine ONDULINE® Fasteners are recommended for use on all
ONDURA® products. ONDULINE® Fasteners are specially designed
to seal around the fixation point and are color matched to your
roofing panel.
See estimating guide on the previous page for more information
about the number of fasteners needed for your project.
For your concluding row and when overlapping panels, place a
fastener in every corrugation.
For overlapping corrugations, place a fastener in the overlapping
corrugation for each of the rows of fasteners, as shown in the
diagrams below.
See example diagrams below. Grey indicates overlap.
Sheet Alignment
Place first ONDURA® sheet on roof. Align the ONDURA® sheet
to the rake edge. Align the eave edge of the ONDURA® sheet to
overhang the eave by 1 to 2.5 inches.
Closure Strip Position
Place closure strips under the ONDURA® sheet with the
curved side up to fill the corrugations. The closure strips must be
placed where the fasteners will be located so that the
fasteners will securely hold the closure strips in place.
Tip: To help hold closure strip in place, adhere strip to the deck or
panel with spray adhesive prior to applying fixation.
Each row should be installed with the first sheet at the
opposite end of the roof from the prevailing winds. With this
orientation, the seam of the overlap will face away from the
prevailing winds. This will reduce the possibility of wind-driven
rain getting under the corrugation overlap. If wind-driven
rain could come from both directions, then we recommend
sealing along the overlap with an elastomeric caulk.
If possible, we recommend placing the first row of ONDURA®
sheets on the roof to confirm coverage overlaps before
installation of the sheets.
Placement of ONDURA® Sheets
If more than one row of ONDURA® sheets is needed, then the
sheets must be installed along the eave first. Then additional
rows are installed above the previous row.
For aesthetic reasons, we recommend staggering the position
of the corrugation overlap for each row by starting the second
row with a sheet that has fewer corrugations. As a general
guide, using an ONDURA® sheet cut in half (parallel to corrugation)
is typically a good way to begin the second row. Then repeat
the pattern with full-width and half-width sheets until reaching
the ridge.
3
Panels with Odd Number
of Corrugations
Panels with Even
Number of Corrugations
For Odd Number of Corrugations:
1. Place fastener in every corrugation of starting row.
2. In next row of fasteners, begin with the first corrugation
and alternate corrugations.
3. In next row of fasteners, begin with the first corrugation
and then place fasteners in the corrugations the previous
row skipped. Conclude with the last corrugation.
4. Place a fastener in every corrugation of the last row.
For Even Number of Corrugations:
1. Place fastener in every corrugation of starting row.
2. In next row of fasteners, begin with the first AND second
corrugation. Then alternate corrugations.
3. In next row of fasteners, begin with the first corrugation
and then place fasteners in the corrugations the previous
row skipped. Conclude with the last corrugation.
4. Place a fastener in every corrugation of the last row.
For Half Panels:
• Place fastener in every corrugation of starting row.
• For middle row, follow the instructions for bullet #2 in the
sections above for the corresponding panel type.
• Place a fastener in every corrugation of the last row.
Always comply with spacing requirements as described in
"Project Planning & Requirements". If additional fasteners are
necessary, repeat bullets #2 and #3 until reaching the last row.