The common types of exterior wall insulation are:
1. Rigid foam insulation boards: Made from polystyrene, polyisocyanurate, or polyurethane, these insulation boards are lightweight, easy to install, and provide good thermal resistance.
2. Spray foam insulation: Applied on the exterior wall surface as a liquid, spray foam insulation expands and hardens into a solid foam insulation layer.
3. Fiberglass batt insulation: These are rolls or batts of insulation made from fiberglass that are cut to fit between the studs and joists of walls.
4. Cellulose insulation: This is made from recycled newspaper and other paper products and is blown into wall cavities to fill gaps and provide insulation.
5. Mineral wool insulation: This is made from mineral fibers and is available in batts or loose-fill form. It provides good thermal and sound insulation.
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