Important Replacement Window Terms

The replacement window world can seem overwhelming and confusing, especially if its your first time replacing windows. Use this list of important terms to help you.
February 18, 2019

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If you’re embarking on a window replacement for your home, you might be feeling confused or overwhelmed. There’s a lot of industry lingo, and these terms can make it even more difficult to know what you and your home need. Use this list of important replacement window terms to shed a bit of light on the industry, and make your window replacement in puyallup, WA easier and less confusing.  

1) Window Frame – The frame holds the window glass in place and is usually made of vinyl, wood metal or a combination of materials.  

2) Window Pane - The window glass. Windowpanes can come in options like double pane, triple paneandenergy efficientcoatings like low-e.

3) Window Glazing – The number of glass layers a window has. A window glaze can be single pane, double pane or triple pane. The more glaze a window has, the more energy efficient it is.

3) Window Sash - A window sash holds the windowpane in the window frame.  

4) Low-E - Low-E refers to a glass coating that reflects infrared radiation to keep heat in your home when the weather is cold and out of your home when its hot.  

5) Bay Window – Bay windows are three windows joined together at a 30, 45, 60 or 90 degree angle to extend out past the house’s exterior.  

6) Bow Window – Bow windows are similar to bay, except the windows are joined together at a 180-degree angle.  

7) Head Jamb – The groove at the top of the window that allows the window sash to move in and out of place inside the window frame.  

8) Upper Sash – The top part of the window, generally made up of a pane of glass set in a frame. The upper sash is fixed in a single hung window, but moves in a double hung window.  

9) Side Jamb – Window grooves that help the sashes move up and down or side to side.  

10) Trim – The trim helps the window frame fit flush inside the exterior wall for a tight, weatherproof seal.  

11) Stop – Stops are usually made from wood, and are nailed to the window frame to hold the different window parts in place.  

12) Lower Sash – The bottom window portion. The lower sash usually moves in both double and single hung windows.  

13) Sill – The windowsill is the lowermost part of the window, and it usually sloped to help water flow off the window when it rains or when the window is cleaned.  

14) Block Frame Window – A block frame window is an ideal replacement window when replacing a wood sash of an old double hung model.  

Deciding what kind of windows you want, finding them, and having them installed isn’t going to be hard if you have the necessary information. Use these terms to help. If you have more questions about Issaquah windows replacement, Puget Sound Window & Door can help. Please pay us a visit at 445 E Main Ave Puyallup, WA 98372 to meet with us in person, or give us a call at (253) 904-8658 for more information.  


Puget Sound Window & Door provides top-tier, energy-efficient window and door installations and replacements across Puyallup, Tacoma, Seattle, and neighboring regions. Elevate your home's appeal and functionality today!
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Visit our showroom in Puyallup to discover our extensive range of premium windows and doors. Featuring top brands like Milgard, Andersen, Marvin, and ThermaTru, you'll find the perfect solution for your home's upgrade or replacement needs in the Tacoma and Seattle areas.