Spray Foam Insulation

These guides explain when spray foam makes sense in Charlotte’s hot‑humid Climate Zone 3A. We cover open‑cell vs closed‑cell performance, best uses (rim joists, knee walls, hard‑to‑seal cavities), sequencing with air sealing, typical costs, and code/moisture considerations. Use this category to decide if foam is the right solution—or if blown insulation and targeted air sealing will deliver the same results for less.