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. ,� . / .� ;:�;:,� � '"` � Gulf�� f�� ��.��a ,,t,�� .,_.,. :.� . , �� .,.,c�,-- ---------- --- -- Installation of Panels Roof Pitch Gulf Coast Supply's engineering requires a minimum pitch of 2/12 for wood frame construction,and 1/a/12 for steel frame, to ensure proper water drainage. A 2/12 pitch means that the minimum roof slope required for all panels is 2 inches of vertical rise per horizontal foot. Butyl sealant with lap screws is required on all side panel laps on roofs with less than a 4/12 pitch to prevent water from siphoning over the ribs (see Figure 7 on page 6),but is optional on roofs with a 4/12 pitch or greater. Consult our representative for recommendations for your particular roof pitch, and about roofing options if you have less than a 2/12 pitch. Roof Preparation Oil-canning is a wave-like,rippled appearance extending up the length of the panel after it has been installed on the roof. Any irregularities in the roof, including uneven plywood joints, warped II plywood, uneven trusses,poor application of underlayment, the use of button caps with felt paper, etc., can promote oil-canning. Care should be taken to provide a flat,uniform surface on which to attach the panels. See page 8 for more details. Roof Application Panel installation should begin at the gable end of the roof opposite the prevailing rain-bearing '� wind (this will provide added assurance against wind-driven rain being forced under the laps). Measure one full panel width in(approx. 38")from the roof edge. At this point chalk a line from ridge to eave (avoid getting chalk on panels—it may discolor them!). Place the leading edge of the first panel along this line.It is extremely important that this panel be laid square to the eave and ridge so that the remaining panels will line up square on the roof frame.It is wise to have a person at the eave and at the ridge to ensure that the proper panel coverage is being maintained across the roof. Also be sure that the panels are properly side-lapped(again, see fig. 7 on page 6). In applications where end-lapping is necessary, the upper panel on the slope should lap over the panel that is lower on the slope. Lower roof pitch requires a greater amount of panel overlap. All end- lap applications require two horizontal rows (across the panel) of butyl sealant tape and proper fastening to provide a maximum water seal. An overhang of 2 to 3 inches is recommended to provide a drip edge, while only 1 inch overhang is necessary where gutters are used (see p. 1 S). The open panel ribs at the eave can be sealed with inside closures. For maximum weather-tightness, a row of butyl tape can be applied above and beneath inside closures. 1�imming and Cutting Steel Panels The best device for cutting steel panels across the profile is either a portable or hand sheaz, or a nibbler. Nibblers,however, and especially Carborundum blades on electric saws, do have a tendency to either leave hot metal particles that can burn paint surfaces or leave rust marks on panels and trim. The same is true of any filings left on the roof caused by the application of screws. Caze should be taken to brush all such particles from roof surfaces after application. To cut panels lengthwise: Note carefully where the panel is to be cut, and,using a straight-edge, score deeply dowri the length of the panel with a sharp-pointed utility knife. Folding the panel along the score mark, and bending back again if necessary, should produce a clean break in the panel. ' CAUTION! clean aA metal shavings and particIes off of roof to avoid unsightly rust stains (352) 498-0778 • Toll Free (888) 393-0335 • FAX (352) 498-7852 - 3 - �