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Thermal Value: The Essential Element for a Comfortable House

We have all encountered values such as R25, R30, R49... in the Reno Climat assessment report. These represent the current or recommended thermal values for your home. Indeed, when we talk about the energy efficiency of a house, insulation is a key element to consider. Among the many factors that influence thermal performance, thermal value plays a crucial role, particularly in attic insulation.

First of all, what is thermal value?

Thermal value indicates the resistance of a material to the passage of heat. In other words, it indicates the ability of a material to prevent the transfer of heat through it. The thermal resistance coefficient R is expressed in square meters kelvin per watt (m²·K/W). The higher the R value, the more insulating the material is.

Thermal resistance requirements in Quebec:

The Quebec Building Code contains requirements regarding energy efficiency and ventilation within Part 11. According to the latest version of the Building Code, the average requirements for thermal value R are as follows:

Thermal Value: The Essential Element for a Comfortable House - Image 1

*These average values may vary slightly depending on the different regions of Quebec

To ensure perfect attic insulation, it is preferable to achieve a thermal value of R60.

Smart choices for attic insulation:

The thermal value depends on the thickness of the insulation you are going to have installed, but more importantly on the type of product chosen.

When it comes to insulating the attic, choosing insulation with an appropriate thermal value is essential. Indeed, effective insulation helps regulate the temperature inside the house, providing increased residential comfort. On the other hand, effective insulation reduces dependence on air conditioning or heating, resulting in a significant decrease in electricity bills.

Cellulose fiber is now one of the best insulators for the attic. It is a recycled and biodegradable product. It is known for its resistance to mold and fire. Moreover, since cellulose is blown into the attic, it can easily cover the entire available space, unlike other insulators like fiberglass where narrow spaces present installation constraints.

In conclusion, investing in quality insulation means creating a more comfortable indoor environment while contributing to energy savings. Consult a professional for a good assessment of your specific needs, as well as recommendations for appropriate solutions with an adapted thermal value R.

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