Should the occasion arise where a caulking material is desirable (around fixtures, etc.) we find rubberized elastomaric caulking to be more effective than asphaltic materials in adhering to Ondura.

Flashing should be used around all roof surface projections and at all surfaces against which the roof abuts, such as walls, parapets, dormers, sides of chimneys, etc. The first consideration for the selection of flashing materilas should be durability. The materials which have proven to be durable flashing materials are aluminum, copper, tin, lead, galvanized iron, and stainless steel.

AVOID GALVANIC ACTION: When dissimilar metals are placed in contact with one another in the presence of an electrolyte, galvanic action will result, which can cause electropositive metals to deteriorate. The possibitlity of galvanic action occuring between dissimilar metals should be carefully avoided by the use of proper insulation between them.

SUPPORTS: Ondura sheets may be applied vertically to horizontal supports 24" on center maximum spacing. Ondura sheets may be applied horizontally to vertical supports 24" on center maximum.

FASTENING: Endlaps and sidelaps should be fastened with Ondura washered nails. In middle areas of sheets, shorter fasteners may be placed in corrugation valleys. Use nailing patterns for roof applications shown in general instructions.

OTHER: Follow the roofing application recommendations on lapping, wind direction, staggering rows and alignment. Closure strips can be used at the top and bottom of sidewalls when Ondura is applied vertically. Ondura skylights cut into halves or thirds and installed below the eave line in a band around the building will allow additional light.

TYPE OF PAINT: Exterior grade latex acrylic paint is the best type of paint to use when repainting Ondura. DO NOT USE SOLVENT OR OIL BASED PAINTS OR COATINGS on Ondura material.

COVERAGE: 1 gallon per 1 square of Ondura roofing or 4.5 sheets.

SURFACE PREPARATION: Coating integrity and service life will be reduced because of improperly prepared surfaces. The surface should be free of moisture, dirt, loose paint, etc.

Mold and mildew should be removed by scrubbing with a mixture of one-quart household bleach to three quarts of water. Scrub well with a brush and allow solution to remain on the surface for ten minutes before rinsing clean with water. WEAR PROTECTIVE GLASSES OR GOGGLES AND WATERPROOF GLOVES! All areas must be dry prior to painting.

DO NOT USE ABRASIVE OR HIGH PRESSURE WATER BLASTERS to clean Ondura. Low-pressure water (80 psi or less) may be used.

PAINTING CONDITIONS: Apply paint only when air and surface temperatures are above 60º F, at least 5º F above the dewpoint and relative humidity is below 85%. Coating must not be applied outdoors when it is raining, snowing, sleeting, or when any form of precipitation is imminent. You must stop painting early enough in the day to allow the paint to dry before the sun goes down. Do not paint on windy days.

APPLICATION: The paint must be thoroughly mixed before use. The paint may be thinned by adding small amounts of water and mixing until correct consistency for spraying.

Badly weathered areas (bare spots with no paint) should be hand brushed with a coat of paint prior to spray coating. Failure to take this step can give poor results. After spot priming the bare areas, the entire roof should be spray-painted.

Paint can best be applied by airless spray. We recommend a .026" or .031" spray tip, 600 psi-1200 psi, fluid pressure and a 60-mesh filter.

Paint may also be hand brushed or mopped.

For best results apply two thin coats of paint instead one heavy coat.

If an Ondura sheet should be accidentally damaged or punctured, the following method may be used to repair damage.

If more than 1/2 the width or more than 1/2 the length of the sheet is open, replace the whole sheet.

If only a small area is damaged, use the following steps to repair:

1. Determine the number of corrugations across which the damage occured.

2. Cut a piece from a new sheet two corrugations wider than the damaged area. This piece should be left full length (79").

3. Remove the nails in the damaged corrugations of the sheet to be covered by this 'patch'.

4. Install the 'patch' under the end lap of the row of sheets above and over the damaged area.

5. Replace the nails and be sure to nail the 'patch' at ends and where it crosses the purlins.