The concept of R-value is one of the hotly discussed issues in home improvement. So with this said, is it essential to understand what this concept means and whether it matters to homeowners? The R-value refers to the thermal resistance of a material that is used as an insulation material. This measure deals with the thickness of the insulation materials and thermal conductivity of the materials. R-value is the relative thickness of a substance compared to the heat transfer capacity. This means that the R-value is defined by both thickness and the extent to which the material can transfer heat.
Mathematically, the R-value is the result of the net thickness of the wall divided by the actual thermal resistance. Ideally, the R-value increases as the thickness increases relative to the wall’s thermal resistance. Similarly, if the wall materials have a higher thermal resistance than expected, this means that the overall R-value will be low.
Clearly, high R-value translates to high or powerful insulation. Therefore, the magnitude of the R-value determines the amount of heat that would be stored.
Each state or country recommends various R-values for different locations. These recommendations form the basis of industry standards that are required of homeowners and builders. Typically an R-value of 22-49 for residential buildings is common.
The type of materials that are used to make insulation walls determines the R-value. Clearly, some materials such as in the attic have a high R-value, while others do not. Before selecting your insulation materials, you should consult an experienced contractor. This will be helpful in selecting materials that will save on energy costs. Many homeowners are unable to cut down on costs because of lack of knowledge about the R-value of their insulators. Studies show that the R-value reduces as time passes and that replacement or upgrading your insulation materials goes a long way to reduce your annual expenditures on energy.