Instructions / Assembly

4
Rake Trim
Finish your rake edge with metal flashing, either over or under the
last corrugation edge of the ONDURA® sheet. When using metal
flashing under the last corrugation, be careful to avoid fastening
through your flashing.
Alternatively, you could use a one corrugation strip from an ONDURA®
sheet under the last corrugation edge, or secure the last corrugation
directly to a raised rake edge.
OVERLAP 7”
OVERHANG
3" to 4"
FOLD
FASTENER
CUT AT PEAK
Ridge Cap
Note: Install all sheets on both sides of the roof before
installing the ridge cap.
Measure the ridge to determine the required
coverage. Ridge caps are 39.5 inches long. If more than one
ridge cap is needed, they must be installed with a 7
inch overlap. The overlap must be over a corrugation so
that the overlap is fastened with a screw through
the corrugation. For resistance to wind uplift, the exposed end
of the ridge cap must be no more than 3 inches from
the closest screw position on a corrugation.
Place the first ridge cap at the end of the ridge away from the
prevailing wind, allowing for a 3 to 4 inch overhang over
the ridge end.
PREVAILING WIND DIRECTION
INCORRECT
CORRECT
90˚
ONDULINE® Fastener Instructions
Drive ONDULINE® screws only through the crown of the corrugation
and always perpendicular to the roof's surface. Be careful not to
overdrive the screw. The rubber washer on the screw should snugly
contact the panel without dimpling the sheet.
When appropriately
installed, slight hand pressure on an affixed corrugation should not
separate the sheet from contacting the washer.
Install screws on the first sheet along the eave and rake edges.
TIP: For each row of screws, install the first two screws at
opposite sides of
the sheet to secure it in the proper place. Then use
the embossments as a screw guide.
Install screws at remaining positions that are not going to be
overlapped by other sheets. See guide in Fastener Positioning
section on previous page.
Place next piece of ONDURA® on to the roof:
Q The sheets must overlap by at least one corrugation along
the direction of the eave.
Q The sheets should overlap by aligning the embossment
guide following the direction of the rake edge.
Install screws on the next sheet in the same manner as the
first sheet.
For the last sheet in a row, install in the same pattern as previous
sheets and in the final corrugation along the rake edge.
Metal Flashing Over
Metal Flashing Under
Insert ridge closure strip above ONDURA® panel and below the
ridge cap after all ONDURA® panels have been placed.
The closure strip must be placed where the fasteners will be
located to secure the closure strip. The center of the closure
strip should be 1 inch above the lowest end of the ridge cap.
Install fasteners through the ridge cap and closure through every
crown (top of corrugation) of the underlying ONDURA®. The
fasteners should be 1 inch above the lower edge of the ridge cap.
If more than one ridge cap is needed align and overlap the ridge cap
by 7 inches as shown on the previous page. Ensure at least a 3- to
4-inch overhang on the end of each side of the structure.
If you have excess material at the overhang, where necessary cut
the overhang portion of the ridge cap along the crown with a utility
knife so that the overhang is between 3 and 4 inches.
Congratulations! You have completed the
installation of your ONDURA roof.
F
or additional assistance, contact our
Customer Service team:
[phone]
Ongoing Maintenance
Remove dirt and loose debris from your roof. Keep
excess organic matter from building on your roof to increase
lifespan. Using a broom to sweep is one of multiple
adequate methods for removing debris.
Do not step on the corrugations directly, steam clean, or
pressure clean your roof.