What is the Purpose of Glazing Windows?
If you are looking into replacement windows for your home, it is important to be well versed in some of the key terminology. Glazing a window, is a term that many people believe is something that is done to a window or that it is some sort of coating applied to a window. Perhaps this is the case because they draw a correlation with other popular uses of the word glazing. For example, glazing a cake or a donut refers to covering the baked good with some form of liquified sugar.
When it comes to windows, glazing actually refers to installing glass or the window pane into the window frame itself. The term glazing comes from an old English expression meaning glass, you will sometimes hear a window with two panes of glass described as a double paned window or double glazed window.
A major benefit of having multiple layers of glazing, is the improved insulating factor of the window itself. A double glazed window has a spacer placed in between the two pieces of glass, this space between the glass allows for the temperature of the internal pane to remain closer to room temperature, reducing heat transfer. To further increase the insulating properties of a multi-glazed window, the space between the glass is sometimes filled with argon gas. This inert gas is denser than the atmosphere, making it more efficient than just air.
When it comes to energy efficiency, double glazed windows are the most popular, but triple glazed and even quadruple glazed windows are available options. The more glazing present, the more energy efficient the window will be. But, with the increased energy efficiency, also comes increased costs of the window itself. Making triple and quadruple glazed windows less popular, even though there is added efficiency.
Referring back to the misconception of glazing a window having to do with a coating applied to the window, there are in fact coatings that can be applied to glazing. A low emissivity or low-e coating drastically helps reduce heat transfer through the window. The coating works by reflecting heat back to its source. In the summer, a low-e coating will help block the heat from the sun from entering your home and in the winter, the coating will help keep the heat in your home by preventing it from escaping through your window.
A low-e coating, argon filled, double glazed window is a popular choice as a replacement window, as it has great energy saving qualities, while providing additional noise dampening (another benefit of having a multi-glazed window), and provides the increased security that comes with any new window installation.
If you are in the Kitchener or Guelph areas and are considering replacing your windows, give PM Windows & Doors a call at 1-800-479-4499 to book your free in-home estimate. One of our industry leading consultants will introduce you to our lineup of quality products, and assist you in selecting the perfect windows for your home.
How Do Windows Keep Heat In?
It is estimated that roughly 25 percent of the heat loss in your home is through your windows. Installing energy efficient windows will reduce the amount of heat transferred by your windows, which subsequently will reduce your energy consumption and the cost associated with heating and cooling your home. Not all energy efficient windows are constructed the same, there are several factors that lead to energy efficient windows keeping heat in or out of your home.
No matter how your windows are constructed, if they are not installed properly you will have issues. These issues can be with the operation, potential leaks and water damage, or drafts and heat loss, or any combination of these. When adequate insulation is not placed between the frame of your replacement windows and your wall, air can find its way into that crevasse from either inside or outside leading to increased energy consumption. Lack of or incomplete caulking will also result in heat loss and increased energy consumption and costs.
The frames of your windows can be made from a variety of materials including vinyl, wood and aluminium. Vinyl is arguably the most popular choice for today’s windows, as they are low maintenance and offer great energy efficiency. However, just because two windows both have vinyl frames, it doesn’t mean they have the same energy efficiency. Thicker vinyl walls, insulated frames, and multiple air chambers in the frames all add to the frame’s efficiency.
3. Glass Panes
Your glass window panes do not do a great job reducing heat transfer on their own. Single pane windows used in older homes allow for hot and cold air to escape and enter your home at a significantly higher rate than today’s dual and triple paned glass windows. Having multiple panes of glass helps insulate your windows better due to the air pockets between each pane, as air is a poor conductor of heat. A triple paned window will insulate better than a double paned window as there is an additional pocket of air.
4. Low-E Glass
Low-emissivity or Low-E glass has a transparent coating that reflects heat by minimizing the amount of infrared light that can pass through your window, without limiting the amount of natural light that can enter. Choosing Low-E coated glass for your windows will help keep your indoor heated or cooled air inside your home, which will assist in maintaining your chosen internal temperature with less effort from your HVAC system.
5. Gas Filler
As mentioned previously, the air pockets between your window panes are great for reducing heat transfer, but when these pockets are filled with either argon or krypton gas and sealed tight, the efficiency of the window increases. These gasses are heavier than air, and conduct heat at even a lower rate than air, providing better insulation. Both Argon and Krypton gas are transparent, odorless, and safe, so if the seals on your windows ever give out, there is no need for concern.