The purpose of this blog post is to discuss the local regulations for insulations in Alberta. We will cover the R-value, heat loss from attics, and attic insulation methods, including blown fiberglass insulation
Alberta weather can be unpredictable, but on average, the winters are cold, and the summers are warm, with both seasons seeing their share of extreme temperatures. With this type of climate; you may find that your home is drafty, creating higher utility bills and causing increased greenhouse gas emissions.
Your home’s insulation, especially in the attic, is your biggest defense against a drafty home.
Read on to learn the standard methods of insulating an attic space, the Albert building codes regarding insulation, and what R-value means.
What is R-value?
R-value is an insulating material’s resistance rating to conduct heat flow. The higher the R-value, the more insulating effectiveness the material has. You can reach higher R-values by adding more insulating material to a space. The R-value of a space is often dependent upon the type of insulation, density, and thickness.
Heat Loss From Attics
Heat rises and migrates to cooler areas. You see the most significant heat loss from your attic during the winter when it’s not properly insulated. If your attic’s insulation needs upgrading, you may notice the following symptoms:
● High heating and cooling bills
● Cool or drafty rooms in the winter
● Icicles on the eaves
● Uneven temperatures between rooms
● Ceiling stains
Even if you don’t have blatant symptoms, you can easily check the state of your attic insulation and calculate the R-value. Look for even distribution and measure the depth. Multiply the number of inches by your insulating material’s R-value. Depending on the material used, you’re looking for a depth of between 35.5cm (14”) and 63.5cm (25”).
What is the Building Code for Insulation in Alberta?
In Alberta, the National Building Code – Alberta Edition requires RSI 10.43(R60) for attics and RSI 3.08 (R22) for all above-ground framed walls. These are minimums, and the recommendation is to exceed these values when economical and practical. You must also install a sealed vapour barrier to block water vapour from transferring from the interior into attic and wall insulation spaces.
Your attic must be well-ventilated to allow airflow to dry any condensation that may naturally occur from hot and cold temperatures. During your insulation inspection, ensure that any vens and soffit intake aren’t blocked or covered by insulation. Without the proper airflow, damage from moisture, such as mould and ceiling stains, can happen fast.
Attic Insulation Methods
The most common methods of insulating an attic are:
Batt Insulation:
A common DIY project for many has been insulation with batt insulationtypically fiberglass or mineral wool. Many believe this is a great project without any training required but batt insulation is prone to air leakage due to incorrect cut and fit as each piece must be cut and fit tightly without gaps to provide a complete blanket of insulation. Batt attic insulation is often a cause of heat loss, leading to condensation and moisture damage.
Spray polyurethane foam (SPF):
Two types that an attic insulation contractor typically uses are light-density open-cell (ocSPF) and medium-density closed-cell(ccSPF) spray foam. The open cell foam is lighter and remains pliable when dry, while the closed cell foam is heavier, more rigid, and has a higher R-value. Many believe all spray foams provide a vapour barrier, however, only closed cell spray foam creates a vapour barrier – leading many to believe they don’t need to worry about air sealing and vapour barrier.
Blown insulation:
The two main types of blown insulation are fiberglass and cellulose. Cellulose comprises 75 to 85 percent ground-up recycled denim or paper mixed with borax, boric acid, or ammonium sulphate. Blown fiberglass insulation is made from an average 25% post-industrial recycled glass such as glass bottles. It‘s blown into attics, nonconforming spaces and hard-to-reach areas, like corners, edges and around framing.
When it’s applied to the recommended thickness and specifications, it improves energy efficiency. And unlike cellulose, it won’t settle, decay or provide food for animals or microbes. It’s effective for the life of the home.
Looking For Blown Insulation in Calgary?
Sorell Insulation is the premier choice for energy efficiency and comfort. Specializing in blown fibreglass attic insulation, our commitment to quality and innovation is showcased through our expertise as a Calgary insulation contractor.
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