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Choosing The Right Windows
February 16, 2018

Understanding Window Basics

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Choosing windows for your Oakville home can become confusing.  A good place to start is with the vocabulary of the industry.  This will help you understand the terms while you are doing your research and enhance communication with speaking with our window installers.

Apron – A horizontal board attached to the wall and under the windowsill.

Casings – Horizontal and vertical molding that enclose the window to provide a finished look.  It covers the space between the window and the wall and is found inside and outside.

Glazing – Glass inside the frame.  Thickness can be single, double or triple.  Double and triple glazing offers the most energy efficiency.  A glazing compound (putty) holds the glass in place.

Jambs – Vertical side pieces to form the frame and hold the sash and glass.

Latch – Locking mechanism that seals the window to allow the weather stripping to block outdoor temperatures.  On a double-hung window it is placed where two rails meet.  On an awing or casement window, it is installed on the bottom rail.

Muntins – Grids that are mounted on the inside of the window to hold glass in place; installed on the outside by snapping over glass to create the effect of separate panes; or placed between two panes of glass (like thermal insulated) for the same effect but for easier window cleaning.

Operator – Crank that opens and closes casement and awning windows.

Rails – Horizontal pieces that connect the stiles and hold the glass in place.

Scissor Arm or Extension Arm – A device that extends or contracts with the use of the operator handle that opens and closes the window.

Sash – Frame that holds the glass in place comprised of rails along the top and bottom.

Stiles –Major vertical supports found on the sides of the window.

Stool – Usually called the sill, it is a board that sticks out like a shelf at the bottom of the window.

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