When it comes to window and door installations in Toronto and the GTA, many homeowners are making the switch to energy-efficient solutions like Low E glass. But what exactly is Low E glass, how does it work, and why is it so important for your home? In this blog, Encore Home Improvements breaks down the basics of Low E glass and helps you understand why it should be part of your next home improvement project.

What is Low E Glass?

Low E glass is a type of energy-efficient glass that has a nearly invisible coating applied to one surface. This special coating is designed to control the flow of heat and light into and out of your home. Imagine tiny molecular mirrors scattered evenly across the surface of the glass — this is essentially how Low E glass works.

There are three types of light waves:

• Short wave (Ultraviolet or UV) – the light we need to see.
• Intermediate wave – responsible for visible light and how we see colors.
• Long wave (Infrared or IR) – which is heat.

How Does Low E Glass Work?

Low E glass is designed to reflect heat while still allowing visible light to pass through. When long-wave infrared light (heat) tries to pass through the glass, it hits the microscopic mirrors on the Low E coating and bounces back. This helps keep existing heat inside your home, making it easier to maintain a comfortable temperature year-round.

On the other hand, UV light, which is essential for visibility, can pass through the Low E glass because the microscopic mirrors are spaced far enough apart to let the short wavelengths through, allowing you to see clearly without compromising your comfort.

Types of Low E Glass: Solar Gain vs. Solar Shield

Now, let’s break down the different types of Low E glass to help you choose the best option for your home.

1. Solar Gain Low E Glass
   Solar Gain glass is designed to let more of the intermediate wave (visible light) pass through. This means more natural light can enter your home and help warm it up, which is especially beneficial during cold winters in Toronto and the GTA. If you’re looking to make the most of free solar heat, Solar Gain is a good option.

1. Solar Shield Low E Glass
   Solar Shield glass, on the other hand, is engineered to block out more of the sun’s heat, making it a great option for keeping your home cooler during the summer months. This type of Low E glass helps reduce cooling costs by minimizing heat entry from the sun.

Which is Best for Your Home?

The decision between Solar Gain and Solar Shield Low E glass ultimately comes down to your needs and preferences. In colder climates like Toronto, many homeowners benefit from Solar Gain glass, which helps reduce heating costs by maximizing the amount of heat the sun provides. However, if you live in an area where cooling is more of a concern, Solar Shield glass might be the better choice.

Both types of Low E glass are far superior to regular uncoated glass, so whichever you choose, you'll be improving your home’s energy efficiency.

Low E Glass Ratings: What You Need to Know

When shopping for windows, you’ll often encounter terms like U-value, R-value, and SHGC (solar heat gain coefficient). Here's what these ratings mean:

• U-value and R-value: These ratings measure the insulation value of the glass. Solar Shield glass typically performs better in these categories because it limits the amount of intermediate light passing through, making it a better insulator.
• SHGC (Solar Heat Gain Coefficient): This rating measures how much heat from the sun can enter your home. Solar Gain glass excels in this category, as it is designed to allow more solar heat into your space.

In Canada, we also use the Energy Rating (ER) system, which combines both insulation and solar heat gain ratings to give an overall picture of a window's efficiency. Be aware, though, that the “best” Low E glass depends on your home’s needs. A salesperson claiming that one Low E is simply “better” may not be considering your specific situation.

Why Low E Glass is a Must-Have for Your Next Home Improvement

Choosing the right Low E glass can have a significant impact on your home’s energy efficiency, comfort, and overall value. Whether you’re focusing on home improvements like new door and window installations in Toronto or updating your home’s energy systems, Low E glass is an investment that pays off in savings and comfort.

Encore Home Improvements specializes in door and window installations in the GTA, offering expert advice and high-quality products to improve your home’s energy efficiency. 

Get in touch with us today to learn more about Low E glass options and find the best fit for your home!

+1 800 461-7644  |  (416) 410-3017