Installation Guide

Easy Maintenance.
Ondura sheet and tile roofs are easy to maintain. Over a period
of years, weathering will age your Ondura’s roof coating. So you’ll
want to give your Ondura roof new life by repainting. First, sweep
dirtandloosedebrisoffyourroof.Theneitherbrushorspraywith
acrylic latex or another top quality 100% acrylic latex exterior paint.
 Caution:Donotsteamcleanorusepressurizedcleaningequip-
ment on Ondura roofing.
Tips
Planning For Ventilation.
 Allroofingrequiresventilation.It’safalseeconomytotryto
conserve heat in an uninsulated building by closing off ventilation
openings.That’sbecausepoorventilationcancauseseverecondensa-
tion problems and dripping, which in turn can cause deterioration
of roof framing and covering materials.
See Figs. 24-28, for suggestions on how to take advantage of
Ondura’s corrugated design and Ridgeline Ridge Vents and Ondura
VentilatedClosureStripstoassistventilation.
 NOTE:TheflexibilityofOndurasheetsandtilesmayleadto
misalignment or “spreading” if care is not taken to keep sheet and
tiles at nominal width (48˝) during installation.
Ondura Tile Rake Trim.
Bring roofing felt 1˝ to 1 1/2˝ over the edge of the rake board. Snap
achalkline4˝fromthetopoftherakeboard.Cutone-corrugation
lengths from an Ondura tile. Make certain to cut in a straight line in
the valley. Starting at the eave/rake corner, lay first tile, not securing
rakeedge.Nailthesideportionoftheone-corrugationstripunder
the rake edge of the tile, securing at both corners where strip and tile
meet.Nailtheother
side portion of strip at
each corner to the rake
board, aligning with
the chalk line. Finish
installing first row of
tile.Continueinstalling
rake edge trim with first
tile on each row. Make
certain to use genuine
Ondura nails wherever
nail head is exposed
(See Fig. 23 & 25).
Walking On Ondura Sheets.
 Installationofroofingmaterialscanbedangerous.Therelativeamount
of danger is increased by the height from the ground, increasing pitches of
the roof slope, inclement weather conditions or other factors. We strongly
recommend anyone installing Ondura or working on a roof in any
manner take all precautions possible to insure their personal safety.
When walking on nailed-down Ondura sheets wear soft-soled shoes
and walk on top of purlins only, placing feet across corrugations.
Ondura is more pliable in hot weather; less pliable in cold weather.
Always use care in walking on Ondura or any other roof.
Fig. 23
Ondura
tile
Fascia
1 Pc. corrugation
2-Corrugation pieces of
solid closure strip
Hip ridge
cap
Fig. 31
Fig. 30
Finished hip
installation
7
Fig. 25
Fig. 26
Fig. 24
Solid closure strip
Air ridge
Ondura ridge cap
Ridgeline ridge vent
Ondura
Air
Rake
End
rafter
Ondura
Purlin
Wood or metal rake trim
Ondura
Air
Fascia
Screened or
slotted opening
Rafter
Fig. 27
Standard ridges cap installation
Minimum 1˝ Maximum 2˝
Fig. 29
Fig. 28
7˝
Solid
closure
strip
Ondura sheet
Ridge cap
Put a nail through ridge cap
at every corrugation crown.
Rafter
Fold down
flaps on and
of ridge cap.
Ridges cap at gable end.
Rafter
Felt
Ridge cap
Ondura
Plywood
Solid
closure
strip
Use vented closure strip
at the eave