Double Hung Windows

Double hung windows consist of an upper and lower sash that slide vertically in separate grooves in the side jambs or in full-width metal weather stripping. This type of window provides lots of ventilation, because you can open half the window. Each sash has with springs, balances, or compression weather stripping to hold it in place in any location.

Compression weather stripping, for example, prevents air infiltration, provides tension, and acts as a counterbalance; several types allow the sash to be removed for easy painting or repair.

The jambs are normally made of 1-inch lumber and the sills are typically made from 2 inch lumber with a slope of about 3 inches to allow water to move away from the window. Sashes are normally about 1 3/8 inches thick. The windows are divided into panes by wood strips called muntins.

Depending on the look of your home, you may have anywhere from 2 -8 panes on each half of your windows. Some of today’s window manufacturers provide preassembled dividers that snap over the window, dividing it into six or eight panes. These are extremely convenient for cleaning, because you can simply snap out the “panes” for a solid glass surface.

When double hung windows are installed, the assembled window frames are placed in the rough opening over strips of building paper put around the perimeter to minimize air infiltration. The frame is plumbed and nailed to side studs and header through the casings or the blind stops at the sides.

Hardware for double-hung windows includes the sash lifts that are fastened to the bottom rail, although they are sometimes eliminated by providing a finger groove in the rail. Other hardware consists of sash locks or fasteners located at the meeting rail. They not only lock the window, but draw the sash together to provide a "wind tight" fit.

In older homes, many people choose double hung replacement windows when it’s time to replace the original wood windows. Vinyl double hung windows help retain the character and period of the home while providing energy efficiency and low maintenance in windows. Choosing double hung windows for your replacement windows helps ensure that your home doesn’t scream “replacement windows” to everyone who drives by. This is often very important to homeowners with older homes.

Double hung windows are a classic choice for your home. They look good with nearly any style home and give a timeless appeal to both your interior and exterior.