You have a few different options when it comes to attic insulation materials. How do you choose the most energy-efficient insulation that keeps you and your family comfortable?
We know it can be tricky to make this decision on your own, which is why we’re here to help!
The Best Attic Insulation Materials
We’ll discuss four different types of insulation: spray foam, fiberglass, a combination of spray foam and fiberglass, and cellulose insulation. We’ll explain which option is best and which we don’t recommend for attics.
Spray Foam Insulation
Spray foam insulation is widely considered the best insulation material for attics, as it is known for its superior performance and versatility:
- Highest R-Value: Spray foam offers the highest R-value (thermal resistance) per inch, making it extremely efficient at maintaining desired temperatures.
- Usable Attic Space: Spray foam, applied to the top side of the ceiling, allows the attic to remain usable for walking and storage.
- Air Sealing: It expands to fill nooks and crannies, providing excellent air sealing capabilities. This can also qualify you for air sealing rebates.
Fibreglass Insulation
Fibreglass insulation offers certain benefits that make it an appealing option for some homeowners:
- Top-Up Capability: Fibreglass is ideal for topping up over existing insulation, making it a versatile option for retrofitting.
- Fire Resistance: It offers excellent fire resistance, adding an extra layer of safety to your home.
- Easy Remediation: Fibreglass insulation is easy to remediate in case of roof leaks. You can address the specific impacted area without needing to remove all the insulation in the attic.
- Improved Air Quality: Unlike some insulation materials, fibreglass doesn’t release dust or particles into the air.
- Cost-Effective: It is one of the most economical insulation options. It provides
- good thermal performance without breaking the bank.
Hybrid Insulation: Spray Foam and Fibreglass
Combining spray foam and fibreglass attic insulation can give you the best of both worlds:
- Base Layer of Spray Foam: Spray foam serves as insulation and a vapour barrier in the attic.
- Cost-Effective Addition: Adding blown-in fibreglass on top of the spray foam base layer can be more cost-effective. It reduces the need for multiple layers of spray foam.
Cellulose Insulation
While cellulose insulation is an option for some spaces, it comes with significant drawbacks. Here are a few reasons we don’t recommend cellulose for attic spaces:
- Moisture Issues: Cellulose, a paper-like substance, is a problem when it gets wet. A roof leak can turn it into a paper mache-like material that is difficult to dry out and remediate.
- Air Quality Concerns: Cellulose isn’t the best option for indoor air quality. Dust and particles from the insulation can seep through ceiling penetrations, contaminating the air.
- Lack of Vapour Barrier: Cellulose is not considered a vapour barrier or an effective air-sealing product. This limits its usefulness in creating a well-insulated and sealed attic.
Attic Insulation on Vancouver Island
If you’re eager to explore these options and find out which is right for you, call the experts at HD Horne Sprayfoam & Insulation Ltd. today.
