Recommended Home Insulation R–Values

Insulation levels are specified by R-Value. R-Value is a measure of insulation’s ability to resist heat traveling through it. The higher the R-Value the better the thermal performance of the insulation.

If R-38 is our code, why do I recommend R-49 for attic insulation? - Bird Family Insulation

Insulation R-Value - InterNACHI®

What Does R-Value Mean? - Pricewise Insulation

Attic Insulation How Much Do I Need?

How Much Insulation Does Your Home Need?

Insulation Department of Energy

R-Value EGEE 102: Energy Conservation and Environmental Protection

R-Value and U-value Insulation materials

What Is R-Value?, Insulation R-Value

How Much Insulation Should You Use?

Insulation Levels for Cold, Hot and Moderate Climates

Rhode Island Insulation R-Value Requirements for RI, Injection Foam Insulation Contractors

What is the Highest R-Value Insulation? (Ratings/Types/Charts)

Insulation R-Values - Buyer's Inspection Service