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.
How Much of an Impact Does Attic Insulation Have on Energy Bills?
Depending on the amount of insulation in your attic, you could save between 10 and 50% on your heating and cooling bills. The amount does vary based on the volume of attic insulation you have installed. As you can guess, the more insulation you have in the attic, the higher the energy savings.
Building codes in Ontario do require homes to have been built with a certain volume of insulation. Although, these codes constantly change. So, if your home is 10 or more years old, your home could have insufficient insulation by current building code standards.
Furthermore, building codes only list the minimal amount of attic insulation the home requires. Builders are not required to top off attic insulation for maximum energy savings for the homeowner.
Can There Be Too Much Attic Insulation?
While topping off your attic insulation is a great idea, there can be too much of a good thing. If you install too much insulation, there will not be proper airflow in the attic. Restricted airflow can shorten the useful lifespan of roofing shingles. As a result, you want to make sure you balance the needs of your roofing system with the volume of attic insulation you have installed.
Besides, most shingle manufacturers will detail in their warranties the importance of having a properly ventilated roofing system. Failing to have proper ventilation could result in your shingle warranty being null and void.
In conclusion, you do want to top off your attic insulation to improve the energy-efficiency of your home. However, you should have a professional do this to ensure your roofing system is ventilated correctly and to avoid installing too much new insulation.
For further information about topping up your attic insulation and ensuring your roofing system is vented correctly, please feel free to contact Logik Roofing at 905.424.7469 to schedule an appointment to find out how much attic insulation your home needs today! We are available at Oshawa, Whitby, Ajax, Pickering and Mississauga.