There are many ways to design replacement windows -- enough choices to make even the most astute home improvement enthusiast confused. Here's a look at the difference between double hung, casement and other replacement window types. Before ordering them from your remodeling contractor, it pays to understand the basic differences.

Popular Replacement Window Types

• Double hung windows are among the most widely recognized replacement windows. These windows have two sashes that slide up and down along side window jambs. These replacement windows have a classic style that fits with old houses and those with traditional architecture. These windows are difficult to clean, so look for new models with windows that tilt outward for ease of cleaning.
• Casement windows have a sash that is hinged on one side. These replacement windows typically open outward when cranked with a handle. These windows are easy to clean and offer good ventilation, but can be more costly than other window types. These windows work well with the architectural style of many newer homes.
• Slider windows are similar to double hung windows, except that the sashes slide sideways instead of up and down. Remodeling contractors often add these in basements.
• Bay windows bow out in the center, either in a circular style or with a three sided design. These replacement windows typically fill a medium to large space and can be the focal point in a living room, dining room or family room.
• Transom windows are stationary windows installed above other windows to enhance the design and light infiltration. They often are ordered together with the other windows and built as one large replacement window unit. This often makes it easier for the remodeling contractor to install them, but the one unit is heavier to work with.

Replacement windows are a popular home improvement project and one that can pay big dividends toward your homes value. Before selecting window types, consider all the options and decide which design fits your home and budget.

About the Author
Allison E. Beatty is a syndicated real estate writer who has been writing home improvement columns for 15 years.