Keeping It Cool: Insulation and Your Home

Did you know that the insulation in your home works just as well in the summer as in the winter? During the hot months of summer, it can help keep the warm air outside and keep the cool air inside. If your home doesn't have enough insulation, the heat from the outside is going to get inside, making your air conditioner work harder.

How Does Insulation Work to Keep It Cool Inside?

Insulation is any material made to keep heat from transferring from one space to another. Home insulation acts as a barrier between the air temperature inside and the air temperature outside.

Conductive heat transfer is the main way outside heat gets inside the home. For example, the hot air heats up the exterior wall, for example. This, in turn, heats up the air inside the wall. That heats up the interior wall. Finally, the interior wall heats up the air inside the house. If there is insulation inside the wall, between the interior and exterior, the conduction of heat gets interrupted.

How Much Insulation Do You Need?

The Department of Energy recommends that existing homes in this part of Florida should have between R-30 and R-60 insulation in the attic. They also recommend between R-13 and R-19 in the floor. If you have uninsulated walls, they suggest drilling holes into each wall cavity and blowing insulation in to the top.

So, how do you have enough insulation in the attic? Grab a tape measure and get up in the attic. If you have batt insulation, you have an R-value of 3 to 3.5 for every inch. So, four-inch-thick batt insulation translates to an R-value of between 12 and 14.

To measure blown-in insulation, gently push the end of the tape measure in until it hits the drywall attached to the underside of the joists. Its R-value will depend on what type it is. The r-value of loose fiberglass can range between 2.2 and 2.9 per inch. For loose stone wool, it's between 2.2 and 3.3 per inch. For loose cellulose, it's between 3.1 and 3.8 per inch.

How Can You Keep the Cool In?

If you find you don't have enough insulation, you need to take action. Call Mid-Florida Heating & Air today to talk about adding more insulation to your home. It will keep your home comfortable through the hot, humid heat of a Florida summer.

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