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.

Ondura Skylights for Use with Sheets

Ondura skylights are translucent fiberglass, and are nailed in the same manner as Ondura sheets. Wherever one skylight panel laps with another, we recommend use of a clear mastic such as silicone sealant, and the use of grommet fasteners at side laps between purling. Wherever a skylight panel laps with a regular Ondura sheet, we recommend use of butyl caulk.

Ondura Tile Rake Trim

Bring roofing felt 1" to 1 1/2" over the edge of the rake board. Snap a chalkline 4 1/2" 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 comer, 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 whenever nail head is exposed. (See figures 37 and 38.)

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 Ondura paint or another top quality 100% acrylic latex exterior paint.

Caution: Do not steam clean or use pressurized cleaning equipment on Ondura roofing.