Simply put, the higher the R-value, the better the insulation. Each type of insulation is assigned an R-value, representing its resistance to heat flow.

What Are Insulation Batts?

Insulation batts are panels or rolls made from fibrous materials like fiberglass, mineral wool, or cotton. They’re designed to fit snugly between standard framing members such as wall studs, floor joists, and ceiling rafters. These batts come in various widths and lengths to suit different framing spaces.

Common Fiberglass Insulation Batt Sizes:

R-15 Insulation: Approximately 3.5 inches thick, suitable for 2×4 wall cavities.

R-19 Insulation: Approximately 6.5 inches thick, commonly used in 2×6 wall cavities.

R-30 Insulation: Approximately 9.5-10 inches thick, ideal for ceilings and floors with ample space.

R-38 Insulation: Approximately 12-13 inches thick, commonly used in ceilings and floors with enough depth for deeper insulation.

R-49 Insulation: Approximately 14-16 inches thick, providing the highest level of insulation, commonly used in ceilings and attics.

These sizes are tailored to fit specific framing dimensions and provide the necessary thermal resistance for energy efficiency and comfort in homes.

Understanding the appropriate R-value and thickness for your insulation needs is crucial for optimizing energy efficiency and maintaining indoor comfort levels.