Triangle windows are a type of specialty windows that can add a unique element to any home’s design. Because they are often custom made and come in a variety of frames and options, triangle windows tend to be much more expensive than double hung windows or horizontal sliders.
Overall Price Point: 9.0 out of 10
Bottom Line: Triangle shaped windows are quite distinctive looking and gave off a certain type of
(Always collect 3 to 4 additional bids)
Bill — Site Editor
Basics Of Triangle Windows
Triangle windows are three sided and can be right angles, equilaterals or all three different lengths. The right angled shape is the most common and are often used in combination with other geometric window shapes and can be found at the top of walls with steeper pitched roofs.
A “V” shaped roof (which are common in climates that get a lot of rain and snow) with a steep pitch may use the triangle window in the upper portion of the wall. This is because they fit well with the design. Additionally, triangle windows are available in all five of the major frame materials, which include vinyl, composite, aluminum, fiberglass windows, and wood clad. While vinyl is the least expensive frame material, wood clad is the most expensive.
Triangle Windows Prices
What do triangle windows cost? so, the typical cost range is $600 to $3500 installed. Additionally, the biggest issues affecting price include the size, frame material and whether a custom installation needs to be done. Smaller sized options that can be inserted or swapped out for the existing window will be at the lower end of the cost spectrum. However, larger wood windows that require custom resizing of the existing opening by contractors will tend to be at the top end of the price scale.
$600 to $3500 installed
Advantages Of Triangle Windows
Interesting Design Option
Triangles shaped windows offer a whole host of design options. Because triangles are an intriguing and angular shape, they tend to add visual interest to a home due to their somewhat rare usage. Additionally, the use of two right angled triangle windows that sit back to back is a popular design that frames the wall and is visually striking.
Great Lighting For Attics
Another popular option is a single equilateral triangle window at the top that provides lots of light for an attic or converted room. Because they can stretch out at an angle on a V shaped wall, they are one of the best ways to maximize natural light for an add on bedroom, play room or sewing room.
Drawbacks Of Triangle Windows
Fixed Frame Only
Triangle frames are unique in the fact that they are one of the only window types that do not open. Unfortunately, the design simply does not allow for it unlike other geometric shapes such as hexagon or octagon windows. These window types can swing completely open. Therefore, the biggest drawback with triangle shaped windows is that you cannot get any natural air flow or ventilation into a room.
Expensive Installation
Expect installation on custom jobs to be expensive. Any time contractors need to resize walls to fit the window into the opening the price tag can go up very quickly. This is one reason to get a
window replacement estimate (3 to 4 is ideal), which allows a homeowner to compare the bids and make sure that the overall price is competitive and to see a price breakdown for the project.
Triangle Windows Reviews
Below are consumer reviews and questions and answers related to these specialty windows. If you have a question for me, please get in touch via email. Thanks.
Bill – Site Editor
Soft-Lite vs Marvin Windows
Bill, we’re replacing our fixed frame vinyl windows, which consists of 10 panels that are roughly 70 inches by 70 inches, along with a handful of triangles, trapezoids and rectangles. So we are currently debating between two basic options. Option 1 is the Marvin Integrity all-Ultrex. Option 2 is the Soft-Lite Elements windows. Marvin options is about 20% more than the Soft-Lite option. Which window do you like and why?
Tommy – Homeowner – from 2025
[Site Editor’s Answer]
Tommy, while both of these options are quite good, for me, the Soft-Lite option at 20% less is going to be the better long term and better value option. The Elements is one of the most efficient vinyl windows on the market and is nice looking to boot. However, let’s be clear that the Marvin Integrity is still the better looking of the two. You might want to inquire as to the cost of the Soft-Lite Elements if you were to add a custom faux wood interior that will mimic the look of real wood very nicely.
Bill – Site Editor – from 2025
Triangle Windows Brands
Hello Bill, I have a searched as best I can to get an idea of what is needed to replace these two large triangle windows on the SW facing side of my log home. Approximately 8 feet across at the bottom. The windows have a vapor leak and are double pane windows. They look to be built into a wood frame. Each pane is separated by a 1/2 inch divider on 3 all sides?
Would you think a large company like Pella would take on such a project. If so where would be the best place to start to reach out to them. Local big box hardware stores have just kinda brushed me off. Thank you for any suggestions. I will include my address. Seems you could get a look at my home on one of the realtor sites.
Cathy – Homeowner – from 2023
[Editor Reply]
Cathy, local installation companies would make custom triangle windows, but you might have to call up a handful before you find one that is the right fit. Your location is good for many of the quality brands listed in my list, which I will send to you.
Bill – Site Editor – from 2023
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