R Value


The "R-value" in the context of home energy refers to the thermal resistance of a material. It is a measure of how well a particular building insulation material can resist the flow of heat. The higher the R-value, the greater the insulating effectiveness.

The R-value is determined by factors such as the type of insulation material, its thickness, and its density. The goal of insulation is to reduce the transfer of heat between the inside and outside of a building, helping to maintain a comfortable indoor temperature and reduce energy consumption.

For example, if you have insulation with an R-value of 20 in your attic, it means that the insulation resists the flow of heat 20 times better than a material with an R-value of 1 inch. So, higher R-values generally indicate better insulation performance.

With Each Jagoe home we provide you with a HERS rating. The Home Energy Rating System (HERS) is a standardized system used in the United States to assess and rate the energy efficiency of residential buildings. The HERS Index is a numerical score that provides a relative measure of a home's energy performance. The lower the HERS Index, the more energy-efficient the home.

The HERS rating can be used to identify opportunities for improving a home's energy efficiency. Builders and homeowners can use this information to make upgrades and renovations that reduce energy consumption and, consequently, lower the HERS Index.

Here at Ironwood, we have upleveled our Energy Ratings and R values.

So take a look at this comparison:

Foundation details: R 11.6 along foundation block

R 11.6 along foundation block plus a 4” horizontal under slab

Wall details: Ext house walls are 2x6 framing where it would be 2x4

Ext walls have r 21 BIBB (Blow in blanket insulation) where typical would be R 15

Heel Heights have been raised to 1’2”, increased from a standard of 10”. Raising the heal height allows attic insulation to increase to R49

Typical attic insulation with a 10” heel height would be R 38

This is not to discredit our standard Energy efficient homes since I did point out Ironwood. This is to show you we go above and beyond other local builders and a better understanding of what R values mean as we evolve. Also, if anyone who is listening hasn’t listened to the “Why choose new construction: energy efficient podcast”, take a listen.

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