About Our
Single Hung Windows in Phoenix & Mesa, AZ

What Is 
A Single Hung Window

A rectangular frame with 2 sections of glass inside. One on top of the other. The top section (or sash) is stationary. The bottom sash slides up. Only the bottom sash goes up & down. This is sometimes referred to as a vertical single slider. The factory screen for a single hung is always a half screen (just over the half that opens).

It is sometimes confused with a double hung window, but a double hung is different because both the bottom and top sashes move up and down.

When compared to a double hung in the same line of windows, the single hung would be more secure, tighter sealed, have a stable frame, require less service, & be easier to operate.

A single hung is more secure

The top sash is permanently fixed in the window main frame with a meeting rail at the bottom of the top sash that is permanently adjoined to the 2 side jambs of the main frame. This gives a fixed rail for the top of the bottom sash to latch into. A double hung window has no fixed meeting rail in the middle at all. Both sashes float in the mainframe.

Some people think double hung windows are more secure at night because one can lower the top sash a few inches for ventilation and no one can crawl in through the top. The problem is to lower the top sash you must first unlock the bottom sash. The two sashes lock into each other. Both must be unlocked to open either. Anyone can crawl in through the bottom when the top is down. No window is secure unless it is closed and locked.

a Few More
Great Single Hung Window Benefits

A single hung window
is more tightly sealed

The top sash is permanently sealed into the main frame so it doesn’t need extra room on either side between the sash and the main frame to allow for movement up and down. Think about it. When a sash moves in a frame, it must be smaller than the frame or it can’t move.

A single hung main frame is more
stable than a double hung

Both sashes in a double hung come out of the frame. Imagine they are both out of the frame. The frame would bend back and forth when you slightly push on it. There is nothing in the middle to give structural support. If you fix the top sash permanently in the frame, then you have a lot of additional support to the frame whether the bottom sash is in the frame or not.

A single hung window has
less service problems

A double hung window has 4 balances to raise and lower the sashes. One balance for each side or the bottom sash and one for each side of the top sash. A single hung window only has 2 balances and only one sash opens. It is simpler and has less moving parts to break.

And Importantly 
A single hung frame is easier to operate

Since only the bottom sash is opened on a single hung window, it is always low and easy to get to. Even when it is time to close it, you only need to grab the bottom and pull it down.

It is a different story for the modern double hung windows in the southwest United States. The tops of Double hung windows are very high up close the ceiling. The old double hung windows from 20 to 60 years ago were lose fitting, lightly weather-stripped and small (2- 3 foot wide and 3-4 feet tall). The energy codes were negligible and the windows were low. It didn’t take much to reach the top.

The modern double hung windows are very tightly weather-stripped and have an inter-lock where the 2 sashes meet to keep air from flowing between. This helps allow them to meet modern energy code and air infiltration requirements. This results in the two sashes rubbing each other when raising and lowering them. So, when you lower the bottom sash to lock it, the interlock at the meeting rails, nudges the top sash down, slightly. You can’t latch them without pushing up on the top sash at the same time you are pushing down on the bottom sash. This isn’t a problem for small and short windows. When the bottom of the window is 2 & ½ feet off the floor and the window is 5 feet tall, it is a problem to push up on the top sash being it is 7 & ½ feet in the air.

Contact Krasiva Windows and Doors for a free in-home consultation at: (602) 678-3737
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