An approach to enclosure rain control that employs a single waterproof barrier to rain penetration. The barrier is not on the exposed face of the assembly but concealed behind the cladding and other material layers, which reduces the amount of rainwater reaching the barrier. Drainage is by definition not required for good performance in this approach. A subset of perfect barrier approaches.
Related terms: Face-seal, Drained, Rainscreen
Related resource: High Performance Enclosures, BSD-030: Rain Control Theory