Find Local Contractors

Low E windows, E standing for emissivity, are considered the most efficient windows due to their ability to reflect heat. The glass is covered with a thin metallic substance that reflects heat, helping improve the climate control in the home. While this makes sense during a hot summer, does it also work in the winter? The quick answer is yes, but only if you have a contractor that installs them correctly.

It may seem that low E glass would be counterproductive in the winter. If it reflects the sun, it also would reflect the heat that can be gained when trying to warm your home. However, there are different types of low E windows and different options for installation. For those that have cold winters, considering a lower U-factor is also important, which helps keep heat in, on top of low E windows. For installation:

• Warmer climates. If the goal is to keep heat out, the low E glass should be put on the exterior window to reflect the heat from the sun, helping to keep the home cooler.
• Colder climates. For colder winters, you want the low E glass to be installed on the interior windows, reflecting heat back inside to lower heating costs.

Low E windows can be beneficial, allowing light in, but reducing lost cool air during the summer and lost warm air during the winter. However, it is just one of several factors to consider when installing new windows. U-factor. SHGC, VT and CR are other considerations when picking your new windows. Talk to your contractor to learn more about what all these options mean and to determine the best windows for your home’s energy efficiency.

Posted on behalf of:
Atwood Home Builders
227 W 8^th Ave
Homestead, PA 15120
(412) 638-1262

Now that you’ve decided to replace the windows on your home, the journey has only just begun. Before you get started on you window replacement project, you should put some thought into what type of glass you need for your new windows. Contrary to what you might think, there are a number of choices. 

Sheet glass is what is found on most older homes. It is easy to cut, but it breaks easily and is not very energy efficient. If you’re replacing a pane of glass that’s broken, this type of glass may be your most inexpensive alternative, but it’s probably not the best. 

Another type of glass used for windows is heat-treated, tempered or safety glass. The name speaks for itself, as this glass is designed to have the least impact when it shatters. Tempered glass is used for automobile windshields, but it can also be used in homes for showers or sliding glass doors. 

When shopping for windows, you’ll also come across a type of glass called low-e, or low emissivity, glass. Low-e glass has been treated with an invisible metallic or metallic oxide coating which controls heat transfer. Low-e glass windows cost a little more than other types of windows, but they can cut energy loss by up to 50 percent.

In hotter climates, one might use spectrally treated glass, which has a tinted coating to control the type of light that enters the living space. Homes in parts of the South that have these windows can see a reduction in their cooling bills by as much as 40 percent. 

Patterned glass has a special surface on one side that obscures transparency. This is a great type of glass for privacy in bathrooms, either on windows or a shower stall. 

Given the wide variety of windows on the market, and great differences in price, you might consider using different types of windows throughout your home, based on need. Of course, when in doubt, always consult a window glass specialist.

Posted on behalf of Atwood Home Builders