How Can Excessive Heat Damage Attic Insulation
Published on May 16, 2025
Attic insulation does much more than keep your attic warm in the winter; it also contributes to improved energy efficiency and reducing drafts. So when your insulation is damaged, you won’t be able to reap these benefits. What many homeowners fail to realize is that their insulation can be damaged by something as simple as heat damage. So, if you live in an area that experiences hot summers, you may notice that your attic insulation is no longer effective. When this happens, you’ll likely need attic insulation removal followed by new installation. If you are looking for high-quality attic insulation in Mississauga, reach out to EcoComfort Insulation today!
Understanding the Role of Attic Insulation
Attic insulation has many benefits and purposes. Attic insulation is supposed to act as a physical and thermal barrier, effectively protecting your home against the elements outside. Some of its main functions include:
- Keep your home/attic warm in the winter months
- Prevent hot air from entering your home in the summer months
- Prevent water from leaking into your attic through the roof
- Increase energy efficiency, reducing your consumption and energy bills as a result
- Reducing drafts
In order to reap the benefits of attic insulation, it needs to be in optimal physical condition. What many homeowners fail to realize is that extreme heat can damage their insulation, reducing its effectiveness.
How Excessive Heat Physically Affects Different Insulation Types
Each type of insulation is different and may react differently to extreme temperatures. However, for the most part, any kind of insulation will become less effective after long-term heat exposure.
- Fibreglass: This insulation can lose its volume and begin to compact when exposed to heat over time, and once it becomes matted, it loses its effectiveness.
- Spray Foam: May degrade or off-gas if exposed to prolonged heat without proper UV protection or ventilation.
- Batt Insulation: Similarly to fibreglass, batt insulation can sag and compress after heat exposure.
- Cellulose Insulation: Cellulose insulation tends to perform well under high heat and will usually remain effective unless exposed to extreme humidity.
Decreased R-value and Efficiency
The most significant issue when it comes to insulation being exposed to high heat is the decrease in R-value that occurs as a result. Since heat damage can physically alter your insulation, it will directly affect its R-value. When the R-value of your insulation decreases, it will no longer be as effective at keeping heat out of your home in the spring/summer. This will increase the workload on your HVAC system as more energy will be required to keep your home cool. This will increase your energy consumption and bills as a result.
Replace Your Attic Insulation with EcoComfort
Investing in high-quality attic insulation means that you do not have to worry about heat damage. Blown-in insulation in Mississauga is the ideal choice for attic insulation because it is made of cellulose and can withstand high temperatures without compromising its R-value. So if you’ve noticed unstable temperatures or drafts in your home, it may be time for attic insulation removal and replacement. Reach out to EcoComfort Insulation today to get started!
