Which type of installation is commonly used for insulation in EIFS systems?

The use of foam board insulation in External Insulation and Finish Systems (EIFS) is quite common due to its superior thermal resistance and lightweight properties. Foam boards, typically made from expanded polystyrene (EPS), extruded polystyrene (XPS), or polyisocyanurate, offer a high R-value, which indicates their effectiveness in insulating a building's envelope. This characteristic contributes to energy efficiency by reducing heat transfer, thus lowering heating and cooling costs.

Additionally, foam board insulation is moisture resistant, which is crucial for EIFS applications since they are designed to manage moisture and protect the building substrate. Foam board can be easily cut and installed, allowing for a straightforward application process, which aligns well with the needs of an EIFS system.

The other types of insulation mentioned don't fit as well with the requirements of EIFS systems. Mineral wool may provide fire resistance but lacks the same thermal properties as foam board. Fiberglass batts are less effective in maintaining continuous insulation and can be problematic in terms of moisture management within the EIFS context. Cellulose, while eco-friendly, is not commonly used in EIFS systems due to potential settling and moisture absorption issues. Thus, foam board emerges as the most suitable choice for insulation in EIFS