Typical recommendations for exterior walls are R-13 to R-23, while R-30, R-38 and R-49 are common for ceilings and attic spaces. Use the JM insulation calculator to determine the recommended R-value for your project, as well as how much insulation you’ll need.

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. The table below shows what levels of insulation are cost-effective for different climates and locations in the home. Learn how to take action today and Rule Your Attic! with ENERGY STAR.

In exterior walls, batt insulation shall be cut neatly to fit around wiring and plumbing, or insulation, that on installation readily conforms to available space, shall extend behind piping and wiring.

2009-2021 IECC: Basement wall insulation is not required in warm-humid locations as defined by Figure R301.1 and Table R301.1 (Figure/Table N1101.2 in 2009 IRC and Figure/Table N1101.10 in 2012, 2015, and 2018 IRC).

As code levels advance, keep informed about innovative practices to meet or exceed code requirements using cost-effective fiberglass and mineral wool insulation.

Sep 12, 2024 · Increased prescriptive above-grade wall insulation R20+5 or R13+10 in Climate Zones 4 and 5. This means that in zones 4 and 5, exterior insulation is required to meet the basic R-value requirement because you can't stuff enough insulation between 2x6 studs to meet minimum acceptability standards.

To properly insulate a new home, you’ll need to know where to insulate and the recommended R-values for each of those areas. Use the Home Energy Saver tool to determine where you need to insulate and the recommended R-values based on your …