5988 Mid Rivers Mall Drive #239. St. Peters, MO 63304

Types of Replacement Windows: A Complete Guide

Types of Replacement Windows: A Complete Guide

Types of Replacement Windows: A Complete Guide

When it comes to replacement windows for your St. Charles or St. Louis home, it’s important that you find windows that are energy efficient, that will boost the value of your home and will last for years to come. But of course, you also want to find windows that are the right style for your home. XteriorPRO offers energy efficient triple pane windows in a wide variety of styles, so you can find the perfect windows for your home.

Double Hung Windows

Double hung windows remain the most popular option in St. Charles and St. Louis. They’re made up of two fully operable window sashes. The top sash moves down while the bottom sash moves up. This makes them ideal windows in terms of ventilation, and the double locking system makes them more secure, especially with triple panes. Our sashes are also designed to tilt inward so that they’re easier to clean, making them an even more appealing option.

Casement Windows

Casement windows are tall windows which are hinged from the side, much like a door. They’re perfect for letting in some fresh air on a nice day. When closed, they offer an unbeatable airtight seal for the best insulation and energy efficiency purposes. These windows have one unobstructed pane, so nothing gets in the way of your outdoor scenery. It’s for this reason that homeowners often install a few casement windows in a row, in order to create a more expansive view of the outdoors.

Awning Windows

Awning Windows Installed in a Living Room


Awning windows are constructed in a similar way to casement windows, but they’re smaller and horizontal rather than vertical. In this case, they’re hinged at the top and open out from the bottom. Awning windows are perfect for flooding the room in natural light while preserving your privacy, which is why they’re often installed towards the top of the walls. In some cases, awning windows are even stacked on top of each other to create layered ventilation and more expansive views.

Bay, Bow, and Garden Windows

This is an example of a Bow Window

Bay, bow, and garden windows are all unique in that they curve out from the wall, thus creating more space in the room. Bay and bow windows are best for this effect. Bay windows are made up of three panes and have an angular, deeper curve, while bow windows are made up of five panes and have a softer curve. They can make smaller rooms seem larger or offer the perfect spot for a window seat or breakfast nook. Panes can be fixed or ventilated, though the center pane of a bay window is typically fixed.


Garden windows also offer a top pane of glass that is sloped to provide a water runoff. These windows are smaller than bay and bow windows and typically installed at a higher angle, but perfect for indoor plants as they offer a clear view from all angles and thus optimal natural sunlight.

Slider Windows

Horizontal Slider Windows


Horizontal sliding windows function much like sliding glass doors, but to a smaller degree. They’re long, horizontal windows with panes that slide along a horizontal track. The natural lighting and expansive views make these windows perfect for kitchens (right above the kitchen sink), living rooms, home offices, bedrooms, and even bathrooms. They’ll help the room to feel more open and airy, as well, making them — much like bay and bow windows — a great option for small rooms.

Picture Windows

A beautiful picture window installed in a dining room area


Picture windows are “fixed” windows, installed only to let in beautiful outdoor scenery and natural lighting. Picture windows can come in all shapes and sizes, often mimicking the design of other types of replacement windows when closed, or taking on another shape completely. XteriorPRO offers specialty picture windows, so you can tell us your vision for your picture window and we’ll create the perfect window for you.


What type of replacement window is right for your St. Charles or St. Louis home? Contact XteriorPRO today for more information or for a free quote to get started on the right replacement window for you. You can also take a look at more types and examples of replacement windows in our exclusive replacement window gallery.