Installation Guide

Fig. 9
For Areas of
Extreme Wind –
Increase the number
of nails used. Place
nails on every
crown with rows 12˝
on center. Edge with
X’s are not nailed
down until lapped
by adjoining sheet.
Fig. 11
Fig. 10
CAUTION: Be sure to
center endlaps on purlins
and center nails on
endlaps.
7˝ overlap
Purlin
Purlin
1 3/4˝
overhang
3 1/2˝
TILE
Installing Ondura Tile On A
New Structure.
On new buildings, Ondura tiles install over solid decking of a
minimum of 1/2˝ thick exterior grade o.s.b. or plywood (or thicker
asrequiredbyyourlocalbuildingcode).Coverthisdeckwitha
minimum 15 pound asphalt roofing felt (or heavier as required by
yourlocalbuildingcode)oricewatershield.Installdrip-edgesand
gable trim as desired or required. Seal the asphalt felt with roofing
cementtoallareastobeflashed.Tocheckthesquarenessofyour
roof visit our website for useful tips.
CAUTION: Avoid installation when the material temperature is
below 35°F.
4
SHEETS
Installing The First Sheet
On A Square Roof.
1. From the corner where the eave and rake meet, measure along
the eave 48 inches and mark.
2. From the corner of the rake and
the ridge, measure along the ridge
48 inches and mark.
3. Snap a chalk line between these
marks for sheet alignment.
4. Toestablishadrip-edgeoverhangof
all eave sheets, drive nails into the
corner rafters at either end of the
eave, and stretch a line between
them 1 3/4˝ out along the length of
the eave. Visually align each sheet
of the eave row with this string for
a uniform drip-edge.
5. Starting at the eave/rake corner,
fasten the rake corrugation of the
first sheet of Ondura at each purlin
up the rake (see Fig. 8 nailing pattern).
6. Nowaligntheoppositeedgeofthe
 sheetwiththechalkline.Nailin
place (see Fig. 8) along the second
corrugation from the chalk line to allow for the side lap of the
 nextsheet.Ifusingclosurestrips,installbeforenailingeave.
Edges with X’s are not
nailed down until lapped
by adjoining sheets.
Fig. 8
Finishing The First Row
Of Sheets.
You can now install the remainder of the first row.
1. From the first chalk line, mark off successive 44-inch spaces
 alongtheeave.Dothesameattheridge.(The44-inchdistance
allows for a 1-corrugation side lap.)
2. Snap chalk lines between the eave and ridge marks for sheet
alignment.
3. NotingthenailingpatterninFigure 8, install the rest of the eave
row (see sidelap in Fig. 9).
Installing The Second Row
Of Sheets.
 Thesecondrowcanbeinstalledsothatallside-lapsmeetlower
sheets in the middle, or so that all side-laps line up from row to row up
the slope of the roof to offset the sidelap of one row from the other.
 Tostaggerthesidelapsfromrowtorow,beginthesecondrow
with a sheet cut in half along its length (see Fig. 9). Be sure to cut
the sheet in its valley. Since the edge of this first sheet won’t line up
with the chalk line of the first row, make a new line half a sheet’s
distanceinfromtherake.Nowinstalltheremainderofthesecond
row using full sheets and new chalk lines (every 44˝) for alignment.
Lapthelowerendofthesecondsheetrow7inchesovertheupper
end of the first row. And be sure the center of each lap is over the
center of the purlin beneath (see Fig. 10).
 NOTE:Forinstructiononinstallingtheridgeandother
installationtips,turntopage7.
For High Wind Areas –
Increase the number of nails used.
Place nails on every crown with rows 24˝
on center. Edge with X’s are not nailed
down until lapped by adjoining sheet.