What is a sash?

The sash is the moveable part of a window made up of the vertical and horizontal frame that holds the glass.

What is a center meeting rail?

On a double hung and a slider window, the center meeting rail is the part where the bottom part of the upper sash and the upper part of the lower sash come in contact.

What is a Constant Force Sash Balance?

A constant force sash balance is the mechanism that allows double hung windows to raise and lower smoothly. This mechanism allows the window to open and stay open in place where you want it. This system uses a stainless-steel coil under tension to coil and assists in easy opening and closing of window sashes. Constant force sash balance systems use computer programs to measure the dimensions for the window and calculate exactly how many coils to use in the window. This system ensures that each window has the proper counterbalance for long term use.

What are Grids?

Grids add definition to your window, dimension to a room, and character to your home. Sealed between the glass for easy cleaning, they are available in two styles—flat internal, deluxe internal.

What is a Window Mull?

The act of attaching two or more windows or door units together. A mullion is a structural element used when installing two or more windows side by side in the same opening. Using a mull bar is an alternative to building a wood frame for the windows.

What is a Window-Opening Control Device (WOCD)?

Child safety latches allow the homeowner to control, or limit, the window opening.

What is Argon gas?

Argon is the gas most often used between panes in a double- or triple-glazed window. It's colorless and odorless and is denser than the atmosphere, providing more thermal efficiency than having air between the panes.

What are Simulated Divided Lites?

Simulated divided lites or SDLs help your home achieve energy efficiency while retaining a traditional appearance. Our deluxe SDL package provides the most authentic look with SDLs on the inside and outside of the window.