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sp~cified separately from that used on the drip edge when ordering. To'prevent penetration of water, insects, and debris at the ridge, outside closures may be inserted between the ridge cap and the top end of the panel. Screws are applied through the ridge cap, closure, and rib in at least every other rib of the panels. At least a #9 x 1 %" {and up to a 2 %" screw should be used for attaching ridge caps. Self-drilling lap screws can be used to attach ridge caps. Keep Metal Roofing Product Materials Dry Paint and finishes of A TF AS panels and trim are designed to endure severe rain and wet weather conditions, CAUTION: Neither paint, galvanized, nor GalvalumeGD finishes, are designed to be in continuous contact with water or condensation for long periods of time. Damage will result if uninstalled panels or trim are allowed to remain wet in storage. Be sure to store material that will not be installed immediately in a dry location. Wet material should be air-dried and re-stacked if installation immediate. NOTE: Plastic should not be used to cover metal panels. How to Figure Screws: On low-pitched roofs, butyl tape or caulk should be applied at the panel lap to keep water from overflowing the lap. For 2-foot spacing between rows of screws, multiply the total linear feet of metal times 2.7. Example: If your order is 1500 feet of 9-5 Rib roofing. 1500 x 2,7 = 4050 screws would be applicable for fastening. Contact your A TF AS representative for a free estimate. Metal roofing application can be aided by pre-ctrilling panels, allowing screws to go quickly and accurately into the desired spacing. Pre-drilling will work provided that pilot holes are placed accurately in the proper locations on panels. Purlin spacing must be uniform and carefully measured.