The building envelope separates conditioned space from exterior or unconditioned environments. It must manage several forces simultaneously.
Water control
Roofs, flashing, cladding, foundation drainage and waterproofing should direct bulk water away from vulnerable materials.
Air control
A deliberate air-control layer should remain continuous across walls, roofs, foundations, windows, doors and penetrations.
Thermal control
Insulation slows heat flow, but framing, concrete edges and steel can create thermal bridges that bypass it.
Vapor control
Vapor strategies depend on climate, materials and interior conditions. More vapor resistance is not automatically better; drying potential matters too.
Think in systems
Stronghold ICF, Innotech Windows, Rockwool insulation and TruExterior siding can contribute to particular assemblies, but no individual product creates a high-performance envelope by itself.