Four Terms to Know In Window Replacement and Installation


From bay windows to single-hinged casement windows, homeowners have no shortage of window installation options. Before selecting window replacement, homeowners should be aware of window terminology. For example, when it comes to the U-factor rating from The National Fenestration Rating Council (NFRC), the lower the number, the better the product. The U-factor measures how well a product prevents heat from escaping a home or building. Here are some other terms that are important to consider when selecting windows.

Tempered Glass

Tempered glass can be a great solution for homeowners concerned with the security of their homes. Tempered glass is treated with different materials than traditional windows, making them tougher to break.

Composite Windows

One type of window replacement many people are not aware of is the composite window. These windows are typically made of more than one material, including fiberglass and various forms of recycled plastics.


In window installation jargon, glazes refer to windows treated with multiple layers of glass. For example, triple-glazed windows are efficient options because they use three panes of glass, but this thickness also makes them pricier and can limit the amount of allowable light.

Air Infiltration

Air infiltration, or leakage, is defined as losing too much air from a window. Properly installed and sealed windows shouldn’t have any significant issues with air leakage, so if homes are leaking air, window replacement can be a good option.

When considering window installation, there are many options from which to choose. Being aware of key terminology is a great way to ensure you make the right choice.