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Show ' Timely Tips to Farmers: 4 Proper Roofing Application Essential for Long Service Extensive field studies indicate that maximum life of roofing on farm homes and barns can be obtained by careful application and proper selection of materials for the purpose to be served. I The asphalt roofing industry, which last year produced 89 percent of the roofing materials; in the United States, has found that proper selection of product and strict adherence to manufacturers' manufac-turers' instructions for application applica-tion eliminate practically all roofing roof-ing complaints. The principal rules to follow, in applying a new asphalt roof or reroofing an existing ex-isting structure to assure trouble-free trouble-free service and long life, are: 1 Roof decks must be smooth, substantially supported to insure rigidity during the life of the structure, made of well-seasoned lumber, and dry when the roofing is applied Space immediately below be-low the roof must be well ventilated, ven-tilated, during and after application applica-tion to prevent the possibility of buckling. Examine Old Roof Carefully 2 On new construction, loose, resinous knots and excessively resinous areas in the lumber should be covered with metal patches before applying felt or roofing to the deck. 3 In reroofing over an old roof, careful examination should be made to be sure the deck will provide pro-vide substantia anchorage for 3 5 Some interlocking, metal locking and seal down types of shingles are especially designed to resist high winds . . . and will, when applied according to manufacturer's manu-facturer's instructions over a properly prepared surface. 6 Asphalt shingles should not be applied to a roof with a rise of less than four inches per foot How to Apply Roll Roofing 7 Ordinary type asphalt roll roofing should not be applied to roofs with a pitch of less than three inches per foot For pitches of one inch to three inches, a wide selvedge roofing should be used 8 Roll roofing gives best results re-sults if first laid out flat in 12 foot strips in a warm place for several hours before it is applied. 9 Nails should not be driven slantwise in such a way that the edge of the nail head cuts into the roofing. Exposed nail heads on roll roofing should be covered with plastic cement. 10 Lap cement should cover the entire lap of the roofing, with an extra' bead extruding along the edge. Bails. 4 Manufacturer's instructions hould be followed carefully. Square-butt strip shingles, for example, under ordinary conditions condi-tions should be laid five inches to the weather and nailed with six nails, just above and about IV2 inches on each side of the cutouts. cut-outs. In areas of extreme high winds, square-butt or hex-strip shingles should have their tabs cemented down with quick-setting lap cement. Some roof failures are caused by faulty selection of materials for specific purpose. The use of asphalt roofing on roofs of too flat a pitch, lightweight materials selected se-lected for heavy duty jobs, g; eater exposure of shingles than manufacturer's manu-facturer's recommendation, or ue of fewer nails, or different location loca-tion of nails than recommended are practices which, the Indus ;ry warns, may result in not obtaining the full useful life nf tb.p materials. |