The Arizona R-Value
Year in and year out, Arizona has some of the hottest weather in the United States. Your home is what protects you from the intense summer heat. However, our state has four climate zones within its borders. In some zones winter temperatures can go well below zero, in others summer highs lead the nation. This variation requires adequate insulation for all homes in Arizona to save money on their heating and cooling bills.
BY THE NUMBERS
R-Value: The R-value is the measure of the resistance of an insulating material to heat flow. It is expressed as R-11, R-20, R-38, etc. where the higher the number, the greater the resistance to heat flow. The heat flow can be from inside your home to the outside as in winter, or the other way around in the summer.
Climate Zones: The EPA has determined the R-value for the various climates throughout the United States. The map shown here is for Arizona only and has the cities overlaid on the government’s climate zones making it easy for you to see which zone you live in.
Your Home: There are three basic areas you need to worry about in your home, the attic, the walls, and the floor. Many Arizonans live in house built on a concrete slab. The table below lists the R-values within the different climate zones and the locations within your home.
There are four basic types of insulation common in Arizona residential construction. Each type has is strengths and weaknesses, some are cheaper, and some are easier to install.
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