Roof Insulation

Insulation is not only an important topic for discussion in Winter but also for Summer. Thermal insulation is defined as products that reduce and slow heat loss or gain by providing a barrier between areas that are significantly different in temperature.

As it warms up this Summer, as it always does, the challenge to keep your building cool begins.  Having proper insulation in place can make a huge difference in the cost of energy in the coming months.

How is insulation measured? By the R-Value. R-value is the measure of thermal resistance and the higher the R-value, the greater the insulating effectiveness. It is used to measure the resistance of heat flowing through a specific material based on its thickness. When you see a high R-value, it means that it is more resistant to heat flow.

How much insulation do you need?  This answer can vary however there are some state regulations. For example, in Ohio when a roof is either re-roofed or built new, an R-20 insulation is required.  One inch of Polyiso has an R-Value of 5.7. Most contractors will choose 2 layers of 2” polyiso, reaching an R-Value of 22.8.

Here is a chart showing the thicknesses and corresponding R-Values.

If you have additional questions, please reach out to us at 866-584-2712.