How Thermal and Air Control Layers Strengthen Exterior Envelopes
While the exterior finish gets most of the visual attention, some of the most important work within exterior envelopes happens in layers most people never see. The thermal control layer and air control layer both play essential roles in regulating a building's comfort, energy use, and long term durability. The Purpose of the Thermal Control Layer The thermal control layer regulates heat flow into and out of a building, with its primary purpose being improved energy efficiency through reduced heat transfer across walls, roofs, and other exterior assemblies. A properly designed thermal layer helps maintain consistent indoor temperatures, reduces heating and cooling costs, and minimizes thermal bridging through framing members. Common thermal control materials include: Fiberglass insulation Mineral wool Spray foam insulation Rigid foam insulation Continuous exterior insulation Each of these materials offers different performance characteristics, and selecting the right com...