If you have ever been in your attic, you may notice that the underside of the roof is not typically insulated. Rather the insulation is installed on the attic floor. This often raises the question does insulation in the attic really matter? After all, cold air and warm air can still get into the attic through the roof, so why even bother with insulation?
To answer this question, let’s take a look at what insulation does – it helps block out cold and hot air and prevent that from getting into the home. A secondary purpose of attic insulation is to keep warm air and cool air in your home and prevent it from escaping through the attic. Insulation in the attic also helps to improve the energy-efficiency of the home.
Without insulation, there would be no protective barrier between the interior of the home, attic, and roof. As a result, cold and warm air transfer would cause your furnace or air conditioner to run frequently to attempt to maintain the desire indoor air temperature.
Additionally, you would experience ice dams forming on your roof. Ice dams occur when warm air from inside the home escapes through the roof and causes snow to melt. At night when it gets colder, the water refreezes, and ice dams are formed. Ice dams can damage the roofing system and lead to even bigger problems.
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