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replacement windows in Phoenix, AZ

Anatomy of Replacement Windows

At first glance, windows may not seem like much. Aren’t they basically some glass set inside of a framework? While that may have been true for some of the first windows ever made, it isn’t the case anymore. Modern replacement windows in Phoenix, AZ have a few more features and components. And the basic anatomy of a replacement window largely depends on the type and style. Many of the components will be the same, but the functionality and location will vary from window type to window type. That said, knowing the names and functions of the different components can help avoid confusion. So here are some of the various parts of replacement windows:


This is what supports the entire window. The top part of the frame is called the head. The two sides are called the jambs. And the lower part of the frame is called the sill. The window frame is usually made from four common materials: vinyl, wood, fiberglass, and aluminum. The different materials will have a lot to do with how windows look, but also how well they insulate and how long they will last. Before making a final decision on replacement windows it is important to understand the advantages and disadvantages of each material.


Several frame constructions have hollow cores to make the windows lightweight and easy to install. And installers fill the spaces with polyurethane foam insulation to help reduce heat transfer. They also insulate and caulk around the frame for the tightest possible seal.

Window Sash

A window sash is what most people think of when they think of a window. It is the part that contains the glass and sees the most action. Parts of the sash include the stiles that run vertically and the rails at the top and bottom. Windows can have a fixed sash, an operable sash, or a combination of both. Picture windows are one fixed sash. Casement, awning, and hopper windows have one operable sash that swings on hinges to open. Sliding windows and single-hung windows have one fixed sash and one operable sash. And double-hung windows have two operable sashes.

replacement windows in Phoenix, AZ


Modern window glazing is so much more than a couple of pieces of glass. Most feature two or more panes of glass spaced apart and sealed as a single unit. The glass is most likely tempered glass, laminated glass, or a combination of the two for added strength and stability. And most manufacturers fill the space between the glass with an inert gas that does not react to temperature fluctuations. And there are also special coatings manufacturers can apply to certain surfaces of the glass to reflect light and heat. All of these technologies combine to improve insulation and increase efficiency.

If you are shopping for replacement windows in Phoenix, AZ, and have questions about window components then contact the experts at Freelite Inc. With over 30 years of experience in the window business, they can help you find the right products at the right price.