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Patterns
Gutters and Downspouts

Builder 3&2 Volume 02 - Construction manual for building structures
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Figure  4-10.-Flashing  of  material  changes:  A.  Stucco  above,  siding  below,  B.  Vertical  siding  above,  horizontal  below. wood backing strips or sheathing. In a single course, a 3d or 4d zinc-coated shingle nail is commonly used. In a  double  course,  where  nails  are  exposed,  a  5d zinc-coated nail with a small flat head is used for the top course, and a 3d or 4d size for the undercourse. Use building  paper  over  lumber  sheathing. FLASHING Flashing  should  be  installed  at  the  junction  of material   changes,   chimneys,   and   roof-wall intersections. It should also be used overexposed doors and windows, roof ridges and valleys, along the edge of a pitched roof, and any other place where rain and melted  snow  may  penetrate. To prevent corrosion or deterioration where unlike metals come together, use fasteners made of the same kind of metal as the flashing. For aluminum flashing, use  only  aluminum  or  stainless  steel  nails,  screws, hangers, and clips. For copper flashing, use copper nails and fittings. Galvanized sheet metal or terneplate should be  fastened  with  galvanized  or  stainless  steel  fasteners. (Terneplate is a steel plate coated with an alloy of lead and a small amount of tin.) One wall area that requires flashing is at the inter- section of two types of siding materials. For example, a stucco-finish gable end and a wood-siding lower wall should be flashed (fig. 4-10, view A). A wood molding, such as a drip cap, separates the two materials and is covered by the flashing, which extends at least 4 inches above the intersection. When sheathing paper is used, it should lap the flashing (fig. 4-10, view A). When a wood-siding pattern change occurs on the same wall, the intersection should also be flashed. A vertical  board-sided  upper  wall  with  horizontal  siding below usually requires some type of flashing (fig. 4-10, vie w B). A small space above the molding provides a drip for rain. This will prevent paint peeling, which could occur if the boards were in tight contact with the molding. A drip cap (fig. 4-7) is sometimes used as a terminating  molding. DOOR AND WINDOW FLASHING The same type of flashing as shown in figure 4-10, view A, should be used over door and window openings exposed to driving rain. However, window and door heads protected by wide overhangs in a single-story structure with a hip roof do not ordinarily require the 4-9







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