Red Seal Carpenter Complete Practice Exam 2025

Using fiberglass batts or spray foam insulation is a common method for insulating walls in new construction because these materials provide effective thermal resistance, which is crucial for maintaining a comfortable indoor environment and improving energy efficiency.

Fiberglass batts are pre-cut panels that fit between the wall studs, making installation straightforward and economical. They are available in various R-values, allowing builders and homeowners to choose the level of insulation best suited to the local climate and building standards.

Spray foam insulation offers additional advantages, such as expanding to fill gaps and cracks, which can significantly reduce air leakage. This property enhances the insulation's overall effectiveness and contributes to better energy savings by preventing drafts.

Both methods are widely recognized, readily available, and comply with building codes, making them popular choices among contractors and builders during the construction phase.

In contrast, the other insulation methods have specific applications or limitations. Cellulose insulation, while sustainable, may not offer the same ease of installation as batts or spray foam. Rigid foam boards are generally used for specific applications like foundation walls and may not be practical for standard stud walls. Reflective radiant barriers primarily work in warm climates to reduce cooling costs and are not a complete wall insulation solution.