Building envelope assembly including moisture transportation feature

A building envelope assembly comprising:

• a structural wall system;
• a drain assembly including a bottom plate, a face plate extending perpendicular from the bottom plate, a sealing cavity, a transfer cavity fluidly connected to the sealing cavity, and at least one drainage cavity fluidly connected to the transfer cavity;
• opposing sealing members assembled in the sealing cavity;
• and
• a concrete slab abutting the structural wall system;
• wherein the bottom plate is disposed along a bottom surface of the concrete slab and the at least one drain cavity extends through a thickness of the concrete slab.

A building envelope assembly comprising:

• a structural wall system;
• a drain assembly including a bottom plate, a face plate extending perpendicular from the bottom plate, a sealing cavity, a transfer cavity fluidly connected to the sealing cavity, and at least one drainage cavity fluidly connected to the transfer cavity;
• opposing sealing members assembled in the sealing cavity;
• a second wall system parallel to the structural wall system;
• and
• a flexible sheet disposed between the structural wall system and the second wall system and configured to transport moisture from between the structural wall system and the second wall system.