How should the insulation be protected when installed?

When insulation is installed, protecting it with a protective shield is important for several reasons. A protective shield can help guard against physical damage that can occur from accidental impacts or environmental factors. It can also prevent moisture intrusion, which is critical since moisture can compromise the thermal efficiency of insulation and potentially lead to mold growth or structural damage over time. Properly protecting the insulation ensures it maintains its intended performance and longevity.

Covering insulation with plastic might seem beneficial; however, this method does not provide the structural protection or moisture management that a protective shield offers. Increasing the R-value refers to improving insulation effectiveness, but it does not address the need for physical protection. The idea that insulation does not need protection overlooks the potential risks involved with exposure to damage and moisture, which could reduce its effectiveness. Therefore, using a protective shield is the most effective way to safeguard insulation after installation.