Should insulation be installed without compressing it?

Insulation is designed to function effectively when it is installed without compression. When insulation materials, such as fiberglass batts or foam boards, are compressed, their thermal resistance (R-value) decreases significantly. This reduction in R-value means that the insulation will not perform as intended, allowing more heat transfer and reducing energy efficiency within the home.

Proper installation of insulation ensures that it maintains its maximum thickness and uncompressed volume, thereby trapping the air that acts as an insulator. This is essential for maintaining a consistent temperature within the living spaces and preventing issues such as ice dams in the winter or excessive heat buildup in the summer within the attic.

Therefore, the principle of installing insulation without compressing it is crucial for achieving optimal thermal performance and energy efficiency.