NORTH INDY Blog

An Introduction to Insulation R-Values | Koala Insulation of North Ind

When replacing your existing insulation or installing new material during construction, you may hear insulation contractors refer to a material’s “R-value” and wonder what it means. In the simplest terms, it refers to an insulating material’s ability to resist heat transfer. This guide explains what this means for you and how it should inform your insulation purchasing decisions.

What Does R-Value Mean?

Insulating materials are rated according to R-values per inch of thickness, which describes how well they can prevent the flow of heat into and out of your home. As a rule, the higher the R-value, the better the material will be at regulating indoor temperatures. R-values vary widely depending on the material in question, with foam board and spray foam typically offering the highest values.

What Level Is Recommended?

The most effective R-value for your home is directly related to the regional climate. In many areas of the Northern and Midwestern United States, for example, insulation contractors recommend R-values of R49–R60 for attics, R25–R30 for floors and crawl spaces, and R13–R21 for walls, depending on thickness and cavity depth, in uninsulated buildings. Lower R-values are recommended when adding insulation to under-insulated buildings.

How Is the Value Determined?

Claims about the quality and efficacy of insulation are subject to strict trade regulations. For that reason, every insulating material is subjected to laboratory testing before being sold. This test consists of placing a material between two plates equipped with a heat flux sensor and temperature sensors. Heat is then passed through the plates, and the sensors engage to determine how well the material resists heat transfer. The number resulting from a series of calculations using this data is the R-value. 

If your home needs new or upgraded insulation, get in touch with Koala Insulation of North Indy in Carmel, IN. Serving households throughout the Greater Indianapolis area, these insulation contractors are backed by extensive training and experience and offer blown-in and spray foam insulation. Call them at (317) 981-2326 to schedule an appointment and visit their website for more information on their services.