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Rainscreens
A rainscreen is an exterior wall detail where the siding (or other cladding) stands off from the surface of the water-resistive barrier (WRB) in order to create a capillary break and allow drainage and drying. When any water reaches the inner surface of the cladding, gravity takes over allowing the water to freely escape through weep holes without touching the rest of the wall. With a rainscreen, drying behind the cladding can easily occur.
A rainscreen wall design will include:
- A water-resistive barrier
- An air gap between the WRB and the back of the siding
- Flashings at all penetrations and vulnerable areas
- Weep holes at the bottom of the wall
- Ventilation openings at the top of the wall (sometimes)
DuPont™ Rainvent™ Battens
DuPont™ RainVent™ Battens are installed over DuPont™ Tyvek® weather barrier. Polypropylene construction makes the battens more durable and less susceptible to water damage than wood furring strips. The ventilated air space created between exterior cladding and wall sheathing allows air circulation vertically and horizontally, to help ventilate the air space to enhance drying and form a capillary break from sheathing.
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DuPont™ Tyvek® DrainVent™
DuPont™ Tyvek® DrainVent™ is a unique drainage mat that features a honeycomb design so that it lays flat for superior cladding support. Its filter fabric eliminates stucco and mortar infiltration and promotes drainage and ventilation. When used with DuPont™ Tyvek® weather barriers you reduce installation and ownership risk through the Tyvek® Weatherization System Warranty. Recommended for stucco, stone, brick, fiber cement, and wood siding.
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