Installation Guide

Repairing Holes.
 Repairnail-sizeholesbyeitherfillingwithrubberizedelastomeric
flashing cement/caulking; or coating the shank of a screw with rubber-
izedelastomericflashingcement/caulkingandscrewingitintothehole.
For larger holes, carefully pull nails from damaged corrugations, then
cut a full-length sheet so that its wide enough to cover the hole, plus 2
corrugationsoneachsideofthehole.Carefullyremovethenailsfrom
the upper end of the sheet. Lap two corrugations on each side of the
hole,andslipthesheetunderthelapoftherowabove.Nailintoplace.
Ondura nails are available in a
galvanized finish; or in a variety of
painted finishes to match sheet
colors. In highly corrosive environ-
ments, such as saltwater areas or in
the vicinity of fertilizer storage, we
recommend using stainless steel nails. Rigid insulation up to
1 1/2 inches thick can be put beneath Ondura by using 4˝ nails.
Use only genuine Ondura nails.
Look for the distinctive nail head pattern.
Fig. 6
1/16˝ diameter
diamond head
1/8˝ thick X 5/8˝ O.D.
EPDM rubber washer
.135˝ diameter ring shank
3˝
Pulling Nails From Sheets.
 Topullanailfromasheet,useaclawhammer
anda11/2˝wooddowelorpipe.(Thistech-
niqueminimizesthechanceofdamagingthe
sheet.) Put the dowel or pipe in the valley next
tothecrownwiththenailtobepulled.Then
use the dowel or pipe as a leverage point for
pulling the nail. (See Fig. 7).
Fig.
7
3
Installing Ondura Sheets On
A New Structure.
On new buildings, Ondura sheets install either over purlins
(See Fig. 9) or over solid decking covered by roofing felt or ice water
shield (See Fig. 3). Over decking, simply follow these same instruc-
tions making sure decking is secure before nailing down sheets.
We strongly recommend installing Ondura over solid decking for
all residential applications and buildings with interior ceilings.
Storage At The Job Site. While stored at the job site,
Ondura sheets or tiles should remain wrapped in their plastic shipping
covers. Left outside and uncovered, damage can result from rainwater
trapped between sheets or tiles. Unwrap stacks as needed during
installation. Don’t allow stacked sheets or tiles to get wet while stored.
Re-Roofing With Ondura Sheets.
Ondura works well as a new roof over an old asphalt shingle roof.
Over roofs with a generally uniform surface, just install sheets using
nails long enough to penetrate 1˝ into supports of decking beneath. Over
corrugated metal (See Fig. 3) or other irregular roofs, first install nail-
er strips using lumber spaced appropriately for the slope of the roof
24˝ o.c., then lay Ondura sheets per instructions. Be sure that nailing
strips are properly securely to roof rafters.
Applying Sheets Or Tiles To
Solid Decking Or Purlins.
Solid decking underlayment must be a minimum of 1/2˝ o.s.b. or
plywood. Purlins must be at least 1˝ boards.
96 ft. length X 12˝ 26.18 sheets.
44 inches width/sheet Round up to 26.25 sheets per row.
21 ft. slope length
6 ft. per sheet row
26.25 sheets/row X 3.5 rows/slope X 2 slopes = 183.7 sheets;
or 184 sheets required.
Fig. 1
Estimating
Ondura Sheets
3.5 rows.
=
=
21´
21´
96´
40 ft. ridge length X 12˝ 10.9 tiles. Round up to 11.
44 inches width/sheet 11 tiles per row.
15.5 ft. slope length 12.95 rows.
14 in. per tile row Round up to 13 rows.
11 tiles per row, 13 rows X 2 slopes = 286 tiles needed for job.
=
=
40´
15.5´
15.5´
Fig. 2
Estimating
Ondura Tiles
Re-roofing over
old metal deck
Old metal roofing
Ondura special order roofing panel
Wood strips directly over old
supports to provide uniform support
Roofing
felt
Ondura special order roofing panel
Minimum 1/2˝ plywood or 1˝ boards
New
roofing
Fig. 3
Re-roofing over
old metal deck
Drive Nails Correctly.
 CAUTION:UseonlygenuineOnduranailsforinstallingsheetsand
tiles (tiles at eave and ridge only) (See Fig. 6). Other types of nails may
not provide sufficient
hold-down strength.
Drive Ondura nails
only through the top of
corrugations. And drive
perpendicular into
purlins…not at an angle, so the rubber washer is snugly in contact
with the sheet (See Fig. 5). Don’t overdrive or under-drive nails.
Slight hand pressure on a nailed down corrugation should not sepa-
rate sheet from washer contact.
Correct
Fig 5
Incorrect Incorrect
Cutting Ondura Sheets And Tiles
Use a utility knife with a sharp blade to
cut in the valleys (See Fig. 4) parallel to the
corrugations using another sheet as a straght
edge. For cuts across the corrugation use a
circular saw with a carbide-tipped blade
inserted in reverse. For a smooth cutting
surface, place a 1˝ x 4˝ board
along the cut line and slide your
saw along the board. Wear eye
protection when cutting.
Fig. 4
Score in valley with utility knife,
then flex sheet back and forth
for a clean-edge break.