What Is The Difference Between R11 And R13 Insulation?

The main difference between R11 and R13 insulation is based on thermal resistance. The higher R value indicates that R13 provides better thermal resistance and is ideal for exterior and interior wall cavities in most climate zones. Both are commonly available in various forms such as batts, rolls or rigid foams. Designed to fit within a standard 2×4 frame, both are around 3.5 inches thick. Understanding the difference between R11 and R13 insulation is important to make informed choices, reduce energy loss and keep your home comfortable.  

A Simple Guide to R-11vs. R-13 Insulation Ratings

Do you want to transform your drafty house into a cozy heaven? With the right insulation type, you can form an effective barrier against heat flow and benefit from its sound-dampening qualities. If you don’t know the difference between R11 and R13, we have compiled a guide below to help you make the right choice. The best choice depends on your specific climate type and the local building codes.

Here is your guide to understanding the difference between R11 and R13.

What Does R Value Indicate?

R-value stands for the ability of the insulation to resist heat flow. The higher the R value, the better the insulation and the resistance to heat flow. This makes R13 superior to R11 in terms of insulation and heat resistance. So R13 provides higher energy savings and improved home comfort compared to R11.

Available Forms of R11 and R13

Often found in old walls, thinner R11 is less common in new construction walls and is mainly used in floors and ceilings only. Both types are available in batts, rolls and rigid boards.

Applications of R11 and R13 Insulation

Versatile R13 can be used in various applications such as interior and exterior walls, floors over unconditioned spaces and crawlspaces. Providing a better thermal barrier than R11, R13 maximizes comfort in colder climates.

Thickness and Density of R11 and R13

R13 is designed to fit perfectly in a standard 2×4 (3.5-inch) wall cavity, ensuring proper installation and better performance with increased energy efficiency. Both come in kraft faces (paperbacked) or unfaced, fitting standard wall cavities. For higher values, R11 and R13 are often paired with insulating sheathing (CI) to meet modern energy codes.

Costs Vs. Benefits of R11 and R13

Both offer decent sound-damping properties. R13 provides more energy savings and heat gains as compared to R11. While R11 is cheaper, the increased insulation and energy efficiency provided by R13 make it a standard choice for modern buildings. Choose R13 for exterior walls or for any space requiring better insulation. R11 can be a friendly choice for homes in warmer regions.

Conclusion

The main difference between R11 and R13 insulation is that R13 provides more insulating power than R11 within the same wall space. It can be a better insulation upgrade, offering better home energy performance at a fraction of the cost. Consultation with an insulation provider can help you determine the right choice according to your local climate and architecture.

FAQs

Is R11 good for soundproofing?

While R11 does provide some sound-dampening properties, it is primarily designed for thermal insulation.

Which R value is good for exterior walls?

Depending on where you live and the home part, you will require a different R value. Exterior walls require R13 TO R23. For ceilings and attic spaces, R30, R38 and R49are common.

What is the lifespan of insulation?

Properly installed, good quality and not disturbed insulation can last the lifespan of the building itself, i.e, around more than 60 years.