Understanding the Four Control Layers in Wall Assemblies: Water, Air, Vapor, and Thermal Management for Durable Building Envelopes
Every wall assembly in a residential building must manage four distinct environmental forces: water, air, vapor, and heat. Building scientists refer to these as the four control layers, and understanding how they interact is essential to constructing walls that remain durable, energy efficient, and comfortable over the life of a home. Each layer has a […]
