What does R-value mean?

When looking at insulating your home or building, the term R value is often used. But what is R Value and what does it mean for home insulation?

R Value

In insulation, the R value of a material is the level of resistance to conductive heat flow – meaning the flow of heat from a warm area to a colder area. Therefore, technically the most effective insulation will have the highest R value. The type of material and the thickness of the material is taken into consideration when calculating the R value. However, R value does not take into account convection, radiation or air infiltration.

Generally, the more insulation you fit in your home, the higher the R-value, meaning the less heat will escape and the warmer your home will be, requiring less heating. However, with loose-fill insulation, the R-value does not increase proportionately with thickness because of the increased density of the product (due to its weight). It’s important to use the R value when looking for the best insulation for your project – building and energy codes will often specify the minimum R-value to be used during construction and installation.

U Value

Another value used for insulation comparisons is the U-value. The U-value is an indicator of the rate at which heat transfer occurs. The lower the U-value, the better an insulator it is because the bigger resistance to heat transfer it has. In the calculation of the U-value, it takes into account conduction, convection and radiation.

Here at Insulation Superstore we have a range of insulation materials for whatever you’re looking to insulate. Take a look at our insulation boards, loft roll insulation, and multifoil insulation and see what you can do to improve the R and U values of your home. If you have any questions or queries don’t hesitate to give our team of experts a call on 01752 692 206.

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