Insulation that is compressed will not provide what?

Choosing the value associated with insulation's performance is critical in understanding how it functions effectively in an attic space. When insulation is compressed, it loses its intended thickness and permeability, which diminishes its ability to trap air and resist heat flow effectively. The R-value of insulation measures its thermal resistance, and when insulation is compressed, it cannot achieve its full rated R-value. This reduction in effectiveness means that the insulation will not perform as designed, leading to potential energy loss and decreased thermal regulation within the space.

The importance of maintaining insulation at its proper thickness cannot be overstated, as it plays a vital role in heat retention, air flow restrictions, and moisture control. However, when it comes to the insulation's rated R-value, compression directly impacts its insulative properties, rendering it less effective in maintaining energy efficiency. Understanding this principle is vital for any inspection related to attic ventilation and insulation practices.