For hips, sheets or tiles from either side must meet to support hip cover (an Ondura ridge cap). Framing should also be in place beneath and near enough to the upper ends to receive nails securing the hip cover. Snap chalk lines on each side of hip to mark area of hip cover. Then cut closure strips in two-corrugation pieces and using butyl caulking, caulk in place a two-corrugation overlapping pattern (Fig. 30 or 31). Install hip cover with 7" end laps. To achieve a tile effect, either buy ridges cut to tile or cut ridges to 19 3/4".

Install all sheets or tiles on both sides of the roof before laying the ridge. At the ridge, the upper ends of sheets or tiles should be no more than two inches apart to support the ridge cap (Fig. 32, 33, 34 or 35). Don't nail down the upper ends yet. They're secured with Ondura nails when the ridge cap is nailed in place. Ondura ridge caps are available in two widths to cover a wide range of building applications.

Place the first ridge cap at the end of the ridge away from the prevailing wind, allowing it to project out three to six inches from the ridge end. Insert closure strip, and then drive Ondura nails through ridge piece, closure strip, and every crown of underlying sheets of tiles. Now cut in three to six inches along the crown of the portion of ridge cap projecting out from the end. Fold down resulting flaps for a weather guard. Position subsequent ridge caps with a 7" end lap.

To achieve a tile effect, cut ridges into fourths and install in the same manner as full sized ridges with a 7" end lap.

With both sheets and tiles, Ondura's corrugated design allows for ventilation openings at the ridge, rake and eave. (See Fig. 36* for examples.) For additional ventilation, use Ridgeline Ridge Vents and Ondura Ventilated Closure Strips.

*This may not be sufficient ventilation for all buildings, especially animal confinement structures. Check with an engineer.