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// CODE SNIPPET

R703.1.1 Water Resistance

Residential Code 2018 of Kansas > 7 Wall Covering > R703 Exterior Covering > R703.1 General > R703.1.1 Water Resistance
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The exterior wall envelope shall be designed and constructed in a manner that prevents the accumulation of water within the wall assembly by providing a water-resistant barrier behind the exterior cladding as required by Section R703.2 and a means of draining to the exterior water that penetrates the exterior cladding.
Exceptions:
  1. A weather-resistant exterior wall envelope shall not be required over concrete or masonry walls designed in accordance with Chapter 6 and flashed in accordance with Section R703.4 or R703.8.
  2. Compliance with the requirements for a means of drainage, and the requirements of Sections R703.2 and R703.4, shall not be required for an exterior wall envelope that has been demonstrated to resist wind-driven rain through testing of the exterior wall envelope, including joints, penetrations and intersections with dissimilar materials, in accordance with ASTM E331 under the following conditions:
    1. 2.1. Exterior wall envelope test assemblies shall include at least one opening, one control joint, one wall/eave interface and one wall sill. All tested openings and penetrations shall be representative of the intended end-use configuration.
    2. 2.2. Exterior wall envelope test assemblies shall be at least 4 feet by 8 feet (1219 mm by 2438 mm) in size.
    3. 2.3. Exterior wall assemblies shall be tested at a minimum differential pressure of 6.24 pounds per square foot (299 Pa).
    4. 2.4. Exterior wall envelope assemblies shall be subjected to the minimum test exposure for a minimum of 2 hours.
The exterior wall envelope design shall be considered to resist wind-driven rain where the results of testing indicate that water did not penetrate control joints in the exterior wall envelope, joints at the perimeter of openings penetration or intersections of terminations with dissimilar materials.

Related Code Sections


R703.1.1 Wall Covering, Water Resistance
by providing a water-resistant barrier behind the exterior cladding as required by Section R703.2 and a means of draining to the exterior water that penetrates ...
Residential Code 2018 of Kansas > 7 Wall Covering > R703 Exterior Covering > R703.1 General > R703.1.1 Water Resistance
1403.2 Exterior Walls, Water-Resistive Barrier
to the studs or sheathing, with flashing as described in Section 1404.4, in such a manner as to provide a continuous water-resistive barrier behind ...
Building Code 2018 of Kansas > 14 Exterior Walls > 1403 Materials > 1403.2 Water-Resistive Barrier
1404.10.1.1 Exterior Walls, Water-Resistive Barriers
Water-resistive barriers shall be installed as required in Section 2510.6 ...
Building Code 2018 of Kansas > 14 Exterior Walls > 1404 Installation of Wall Coverings > 1404.10 Adhered Masonry Veneer > 1404.10.1 Exterior Adhered Masonry Veneer > 1404.10.1.1 Water-Resistive Barriers
1407.4.1.1 Exterior Walls, Water-Resistive Barrier
For EIFS with drainage, the water-resistive barrier shall comply with Section 1403.2 or ASTM E2570 ...
Building Code 2018 of Kansas > 14 Exterior Walls > 1407 Exterior Insulation and Finish Systems (EIFS) > 1407.4 Weather Resistance > 1407.4.1 EIFS With Drainage > 1407.4.1.1 Water-Resistive Barrier
2510.6 Gypsum Board, Gypsum Panel Products and Plaster, Water-Resistive Barriers
Water-resistive barriers shall be installed as required in Section 1403.2 and, where applied over wood-based sheathing, shall include a water ...
Building Code 2018 of Kansas > 25 Gypsum Board, Gypsum Panel Products and Plaster > 2510 Lathing and Furring for Cement Plaster (Stucco) > 2510.6 Water-Resistive Barriers
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