Standard flashing detail wall penetration

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Description : Through-wall flashing is used to divert moisture, which has entered the wall, to the outside, before it can cause damage. This flashing method is considered the most satisfactory method of preventing leaks except in areas exposed to earthquakes. Through-wall flashing is used at all points where moisture may enter the wall, and in selected places particularly susceptible to water damage. The flashing must typically rise at least 8" from the low point at the exterior face of the building to the high point inside the wall. Weeps spaced a maximum of 24" O.
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Info-303: Common Flashing Details

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Flashings | Dimond Roofing

Gravity is the driving force behind drainage. In general, the sooner water is directed out the better. Sooner, may not always be practical—such as at window openings where draining a window into a drainage space behind a cladding is often more practical than draining them to the exterior face of the cladding. The most elegant expression of this concept is a flashing see Roof to Wall Flashing with Foam Sheathing. Flashings are the most under-rated building enclosure component and arguably the most important. Flashings are integrated with drainage planes creating, for all practical purposes, a flashing for the entire assembly.
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9.1. Through-Wall Flashing

Install flashing integrated with air and water control layers around piping, vents, and other wall penetrations as part of an exterior wall retrofit as follows:. While these elements are needed for functional reasons and to add character and amenity to buildings, they can complicate the continuity of the building enclosure functions, including the air, water, vapor, and thermal control layers. In most walls, a water control layer protects the structure.
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The following range of flashings have proven to be universally popular and suitable for most applications. Minor local variations may exist from that shown. Dimensions are nominal and may vary with changes in material. Ecofoam is a polyethylene closed cell foam produced by Tetral Industries Ltd Christchurch for use in providing long life seals against water, draughts and pests, and is commonly used between the underside of flashings and roof or wall sheet profiles.
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