Aluminum Window Frames
Commonly used to construct window frames. Aluminum window frames are both light and durable. Though not energy efficient, aluminum frames cost less than both vinyl and wood frames.

Argon
Argon is a type of glass typically put into the airspace separating the panes of a dual glass window to increase energy efficiency.

Double Glass
Also called insulated glass, a double glass window is constructed from two pieces of glass separated with airspace in between. This airspace acts as a buffer, decreasing the amount of heat lost through the glass.

Low E glass
Greatly contributes to windows' energy efficiency. Low E glass has been coated with a special metallic coating that deflects UV and infrared rays and limits solar heat gain.

New Construction
Also called nail-on frames, this type of frame installation is used for new construction where the window frame is nailed to the studs.

Obscure Glass
A type of glass meant to camouflage a window. Often used in bathrooms. Styles include: rainglass, glue chip, reed glass, and several others.

Retrofit Frame Installation
This type of frame is used when one has existing wood or aluminum windows and wants to upgrade them without damaging stucco or siding.

Single Glass Window
A single glass window constructed of just one pane of glass. Most builders no longer use single glass because it is not energy efficient. See Double Glass Window.

Tempered Glass
Often called safety glass, tempered glass does not shatter as easy as non-tempered glass. When it does break, it crumbles into very small pieces to reduce the threat of injury. Used in all doors and most windows installed within 18 inches of the floor.

Tinted Glass
Coated with a darker color to reduce sun glare and solar heat gain.

Vinyl Window Frames
Vinyl window frames are durable and energy efficient--they conserve up to 30% more energy.

Wood Window Frames
Wood window frames are decorative and can be energy efficient, but can cost up to 3 times as much as vinyl frames. Midtown's triple pane vinyl windows are availabile with several convincing wood grain finishes.