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1952 Theatre Catalog, 10th Edition, Page 231 (197)

1952 Theatre Catalog, 10th Edition
1952 Theatre Catalog
1952 Theatre Catalog, 10th Edition, Page 231
Page 231

1952 Theatre Catalog, 10th Edition, Page 231

Applying S-V Crimp Sheets

Lay the first sheet over the drip strip or formed gable end starter at the lower corner on the end away from the prevailing winds. The lower edge of the sheet should be flush with the drip edge if one is used, and should extend about two inches over the sheathing if no drip strip is used. Nail the sheet along the top of the outer crimp on 8" centers and through the center crimp on 16" centers. Use 10-gauge etched shank aluminum roofing nails, 1%" long, with Neoprene sealing washers attached, or spiral shank nails with washers, where superior holding qualities are required. Nailing in the flat area between the crimps at the eaves is recommended only in special cases where the locality is subject to high winds.

nsvmmo wme DIIIEVION *:

FIG. 5. Starting First Sheet: Illustrated is the recommended method of starting 5 V Crimp Sheet.

The second sheet should be applied next to the first sheet, and lapped at the two crimps. Nail through the top of the outer crimp of the overlapping sheet as above. The third sheet can be applied beside the second sheet or lapped above the first sheet as the first sheet in the second course. In multiple course roofs having a slope of four inches or more, the upper sheets are lapped a minimum of six inches over the next lower sheet. The minimum rise, for roof slopes having one row of sheets only, is three inches per foot. For slopes having multiple rows up to 24 feet, the minimum rise should be four inches. Slopes in excess of 24 feet should have a rise of four inches per foot.

Do not nail in the side of the V crimps; nail only at the top of the crimp. Do not overdrive and crush or Hatten the crimps, but stop hammering when the washer is seated and held snug, with the

FIG. 10. Nail Through Top of Crimp Only: Below is shown the approved method to obtain best results.


FIG. ll. Finishing Course: The above sketch illustrates the tinish course in applying crimp sheets.

nail in a slight dimpling of the crimp.

Apply the sheets continuously across the roof, keeping the lower course at least one sheet ahead of the next course. At the opposite gable, nail the sheet through the outside crimp if the sheet matches the edge of the roof. Where the roof is not a multiple of the sheet width, cut the last sheet in the course along its length so as to cover the roof and provide a flange which is turned down and nailed along the gable edge on four to six-inch centers.

An alternate method of finishing the gable ends is to bend the first two crimps of the starting sheet down over the face of the facia board and nail at four to six-inch intervals through the top of the crimps. The opposite gable is then finished similarly by bending the final sheet over the facia and nailing it in place.


The 5-V crimp roof sheets should be of sufllcient length to meet at the ridge of the structure. Often it is desirable to run the roof sheets of one slope about an inch above the ridge. This extension is then snipped wherever necessary, bent over the ridge, and nailed.

A ridge cap accessory, formed to interfit with the 5-V crimp roofing is recommended. Nail at the crimps of the apron

FIG. 12. 5 V Ridge Roll: The recommended

Below: FIG. )3. Plain Ridge Roll:




with aluminum nails and Neoprene washers. When using this type of ridge cap, be sure that the sheets on the two slopes match each other for the proper alignment of crimps.

As an alternate, a plain ridge roll can be used in 10-foot lengths to finish the ridge on 5-V crimp roofing, Place the ridge roll over the ridge, allowing about an inch projection at the gable ends for snipping and folding of the ends. Mallet the apron between the crimps and nail at every four inches. Lap additional lengths from two to three inches.


An aluminum formed valley accessory is recommended with 5-V crimp roofing. Overbend the valley in relation to the roof valley to insure a snug fit when the valley is applied to the roof. Nail the flange along outer edges with aluminum nails at one-foot intervals.

FIG. 14. Valley Flashing: The llg" overhang may be seen in this illustration of the best method.

Cut the roof sheet parallel to the valley line, allowing a half-inch overhang at the step or curb in the valley. Nail the sheet in place as far back from the edge of the sheet as possible and still nail through the outer edge of the valley dashing. Be sure to use Neoprene washers on all nails.

End and Side Wall Flashing

End and side wall flashing is made by taking an aluminum flat sheet, 14"

FIG. 15. Side Wall Flashing: The above detail illus< trates clearly the accepted method of application.

wide, and forming it into an angle, 7" on a side.

On side wall flashing, form a halfinch flange on the apron that rests on the roof sheet, and nail the side wall
1952 Theatre Catalog, 10th Edition, Page 231