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Does Your Insulation Lose R-Value Over Time?

When’s the last time you thought about the importance of the insulation in your home? It’s not something most homeowners spend a lot of time thinking about. But it is important in keeping your home warm in the winter and cool in the summer. 

In the warm months, insulation reduces heat flow as your home heats up from the sun and tries to penetrate into your home. In the cool months, insulation works to keep your heated air within your home, and not let it seep out to the cold air surrounding your home. This resistance is called “thermal resistance” or R-value. Does Your Insulation Lose R-Value Over Time?

If you’ve done any research on R-value, you know that the higher the R-value, the greater the insulating power of the insulation itself. That’s pretty straightforward. But what most homeowners don’t realize is that the R-value is lost over time based on a number of things. 

Heat and cold – R-value isn’t a constant. The thermal qualities of insulation change depending on how hot or cold your attic gets. Over time, this can also change as your insulation ages. 

Age – Like everything in your home, insulation is only designed to last for so long. 

Moisture – Any time your insulation comes in contact with moisture, it loses its insulating qualities and runs the risk of developing biological growth, which can impact both the insulation and the air quality of your home. 

Renovation – Every time you head up into your attic, you run the risk of disturbing the insulating qualities of your insulation. If you’ve added a ceiling fan, changed out the roof, or added vents, for example, the insulation may have been disturbed, reducing the R-value of the insulation. 

Is your insulation in top condition? Do you know the R-value of your insulation? If not, maybe it’s time to update it to help keep your home comfortable all year long. 

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