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20 Μαΐ 2009 · Cap flashing or other pre-manufactured flashings can provide elegant solutions to drainage plane penetrations. Where flashings need to be site-built from sheet metal, or flashing membranes, the finished installation must follow the fundamental flashing rules of down and out.
Roof Drip Edge Flashing at Roof Eaves & Gable Ends. Roof drip edge flashing serves multiple functions on a building, the foremost of which is to assist water in leaving the roof edge with minimum damage to other building components by directing the water off of the roof and into the gutter.
You could use either a drip cap, cap flashing, or Z-flashing – essentially the same as a drip cap, but with a taller upper leg. You could also adapt a roof drip edge or have a custom flashing fabricated by a siding or sheetmetal shop.
be either metal cap flashings or butyl or EPDM membrane underflashings. Metal capping flashings are detailed in E2/AS1 Figures 9 and 10 (see Figure 12). They must have: a minimum cross-fall across the top of 5° drip edges to both sides – use a bird’s beak drip edge on the deck side of a balustrade 35 mm minimum gap Figure 12
construction of flashings. Details illustrated in this document represent commonly used flashing construction. These details are intended to illustrate the flashings component only. Other building components are shown in the detail only to complete the illustration; information about them may be incomplete. Other Best Practice
A better drip-cap flashing is made of metal at least 0.019 in. (26 ga.) thick and has a tall wall leg, a sloping cap leg, and wide drip leg with a hem and kick bend along the botton so it stays tight against the trim and resists wind-driven rain.
How-To. Installing and Flashing Windows Correctly. If you don’t include housewrap, use a sill pan, and flash the flanges, the work is far from watertight. By Rob Moody Issue 197. Given the fact that windows create large holes in a house’s exterior, I’m always shocked to see how many builders in our area don’t install them correctly.
