Abstract: A through-wall flashing support system for supporting a through-wall flashing membrane installed in a cavity wall. The system includes multiple support parts, multiple spline parts and a through-wall flashing membrane. Each support part has a flange, configured to abut and be attached to an inner wall of the cavity wall, and a base, extending with a downward slope from the lower portion of the flange such that the outer portion of the base penetrates an outer wall of cavity wall. Spline parts are configured to connect adjacent support parts. The through-wall flashing membrane extends across the cavity and covers the bases of the support parts and the spline parts. Weep holes are installed to enable water to flow through the outer wall along through-wall flashing membrane. Methods for installing this system in a new cavity wall and retrofitting an existing cavity wall are also provided.

Abstract: A through-wall flashing support system for supporting a through-wall flashing membrane installed in a cavity wall. The system includes multiple support parts, multiple spline parts and a through-wall flashing membrane. Each support part has a flange, configured to abut and be attached to an inner wall of the cavity wall, and a base, extending with a downward slope from the lower portion of the flange such that the outer portion of the base penetrates an outer wall of cavity wall. Spline parts are configured to connect adjacent support parts. The through-wall flashing membrane extends across the cavity and covers the bases of the support parts and the spline parts. Weep holes are installed to enable water to flow through the outer wall along through-wall flashing membrane. Methods for installing this system in a new cavity wall and retrofitting an existing cavity wall are also provided.