Insulation
How Insulation Adds an Extra Layer of Comfort in Your Home
Reviewed by Fadi Mamar, Co-founder
When it comes to feeling comfortable in your home, there are many factors to consider. One of the most important is insulation. Insulation is the material that is used to reduce heat loss or gain in a building. In simple terms, insulation is like putting on an extra layer of clothing on a cold day. It helps keep the warmth inside in the winter and the heat out in the summer. In this article, we will discuss how insulation adds an extra layer of comfort to your home.
The R-Value
Before we dive into the benefits of insulation, let's first understand the R-value. The R-value is a measure of the insulation's ability to resist heat flow. The higher the R-value, the better the insulation. The R-value is determined by the type of insulation, its thickness, and its density. The Canadian government recommends a minimum R-value of 50 for attics, 20 for exterior walls, and 10 for basements.
Types of Insulation
There are several types of insulation available, each with its own benefits and drawbacks.
1. Fibreglass Insulation: Fibreglass insulation is the most common type of insulation used in homes. It is made of tiny glass fibres and comes in batts or rolls. Fibreglass insulation is easy to install and relatively inexpensive. However, it can be itchy and uncomfortable to work with.
2. Cellulose Insulation: Cellulose insulation is made from recycled paper products and is blown into walls or attics. It is more expensive than fibreglass insulation but is more environmentally friendly. Cellulose insulation is also more effective at reducing air leakage.
3. Spray Foam Insulation: Spray foam insulation is the most expensive type of insulation but is also the most effective. It is sprayed into walls or attics and expands to fill all gaps and cracks. Spray foam insulation also acts as a vapour barrier, preventing moisture from entering your home.
4. Reflective Insulation: Reflective insulation is made of aluminum foil and is installed in attics or walls. It reflects heat away from your home in the summer and keeps it inside in the winter. Reflective insulation is relatively inexpensive but is not as effective as other types of insulation.
Making the Most of Your Home Insulation
To make the most of your home insulation, there are a few things you can do.
1. Seal Air Leaks: Air leaks can account for up to 40 percent of your home's heat loss. Seal air leaks around windows, doors, and electrical outlets using caulking or weatherstripping to prevent further heat loss.
2. Increase Insulation: If your home is poorly insulated, consider adding more insulation. This will help reduce heat loss and lower your energy bills.
3. Upgrade Windows: If your windows are old and drafty, consider upgrading to energy-efficient windows. This will help reduce heat loss and improve your home's overall energy efficiency.
4. Use a Programmable Thermostat: A programmable thermostat allows you to set your heating and cooling system to turn on and off at specific times. This can help reduce energy consumption and lower your energy bills.
Final Thoughts
Insulation is an essential component of any home. It provides an extra layer of comfort by reducing heat loss or gain. There are several types of insulation available, each with its own benefits and drawbacks. To make the most of your home insulation, it's best to seal air leaks, increase insulation, upgrade windows, and use a programmable thermostat. By implementing these tips, you can improve your home's energy efficiency and reduce your energy bills, all while staying warm and comfortable.
Make your home extra cozy with the help of Konstruction Group Inc. We are one of the leading spray foam insulation companies in Toronto, with a portfolio of hundreds of completed projects and the most skilled operators and foremen. We aim to serve your best interests and needs all the time. Get in touch with us today!
Frequently Asked Questions
How do you add another layer of insulation?
The most common method is to add insulation on top of existing material, particularly in attics where batts or blown-in insulation can be layered directly over what is already there. In walls, a second layer can be added by building out the stud cavity or applying rigid foam board to the exterior or interior surface. Always ensure the existing insulation is dry and in good condition before adding new material.
Why do builders put more insulation in an attic than in walls?
Heat rises, meaning the attic is where the greatest amount of thermal energy escapes in a GTA winter, making it the most cost-effective place to invest in higher R-values. Ontario's Building Code requires higher R-values for ceilings and attics (typically R-50 or more) compared to walls (around R-22) for this reason. Attics are also far more accessible, making it practical and affordable to install thicker layers of insulation.
Is there a downside to insulating interior walls?
Insulating interior walls adds little thermal benefit since both sides are already within the heated envelope of the home, though it can significantly improve sound transmission between rooms. The main downside is the cost and disruption involved, as it typically requires opening up walls unless injection foam or blown-in methods are used. For GTA homeowners, the investment may be better justified for noise reduction in media rooms, home offices, or bedrooms than for energy savings.
What is the most important part of your house to insulate?
The attic is widely considered the most critical area to insulate in a GTA home, as it directly prevents heat loss through the roof and helps reduce heating and cooling costs year-round. Sealing and insulating the attic hatch and any penetrations is equally important, as even small air gaps can drastically reduce overall performance. After the attic, basement walls and rim joists are the next most impactful areas to address in Ontario's cold climate.
Can you add insulation to existing walls without removing drywall?
Yes, blown-in insulation — such as cellulose or fiberglass — can be injected into existing wall cavities through small holes drilled from either the interior or exterior, which are then patched afterward. Injection foam is another effective option that fills cavities completely with minimal disturbance to finishes. These methods are popular with GTA homeowners doing retrofits, as they improve energy efficiency without the expense and mess of a full wall renovation.
Sources & Methodology
Factual claims in this post were verified by Konstruction Group against authoritative Canadian building standards and government publications, including Natural Resources Canada's Keeping the Heat In guide for R-value recommendations, Ontario Building Code (O. Reg. 332/12) for provincial thermal performance requirements, and Building Science Corporation research on vapour barriers and moisture management. Energy-loss statistics were cross-referenced with NRCan residential energy efficiency data.
Written & reviewed by
Fadi MamarCo-founder, Konstruction Group Inc
Engineering graduate from Toronto Metropolitan University with 14+ years in Toronto construction. Has overseen 500+ residential and commercial framing, insulation, and drywall projects across the GTA.
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