1. Configuration options

When it comes to storm windows you may choose from two track, triple track, two track slider or basement (also called picture) storm windows. Now what are the differences?

Basically, the differences mean what your window will and won't do. For instance, in a two-track storm window the half-screen and the outer pane or sash both rest in the outside track. This means that neither one slides up or down. However, the inside pane rests in a separate track and may be raised to allow fresh air into your home.
In a triple-track storm window each pane and the half-screen rests in its own individual track, so each sash can move independently. This means that you can open the window completely, and with this added flexibility you can pass items through the open window when necessary because you can move the screen. It also means you can be more versatile with your ventilation, because you can also move both glass panes to the bottom of the window with the screen at the top for better cross-ventilation during temperate weather. A triple-track storm window gives you more options

So, as you can see, the number of tracks makes a difference, but what does a two-track slider storm window mean? Two-track slider storm windows are just like regular two-track storm windows, except they open horizontally instead of vertically. Two-track sliders are usually used with slider windows.

In a basement or picture storm window there is only one pane, similar to a typical picture window. The pane is held in place by thumb latches on the outside of the storm window frame for easy removal during mild weather. Some picture storm windows have a screen made into the inside of the frame to keep insects out when the pane is removed.

Color Options

Storm windows come in color options, which can be a lot of fun. Most are commonly available in brown, white and mill, a silvery, aluminum color, and some are available in almond.
Measuring for Storm Windows

Having an accurate measurement will help to ensure a good fit. You will need an accurate measurements for every window in your home. Measure each one individually, even if they appear to be the same.

For the width measure from the inside of the brick molding on one side of the window to the inside of the brick molding on the other side of the window. Measure at the bottom, middle and top of the window as some windows are not perfectly aligned, then use the narrowest measurement for the width of your storm window.

For the height measure from the sill to the inside of the brick molding at the top of the window. Measure at the left, middle and right of the window and use the shortest measurement for the height of your storm window.

Why do you use the smallest measurements? By using the smallest measurements you ensure that the storm window's flanges will fit inside the exterior trim and you do not have to go and buy new storm windows.