Growing awareness of windows in home design is evident in new and renovated homes. Windows and doors are no longer just a portion of the outside envelope. Instead, they are an integral part of the lifestyle created within the home. Most “window shoppers” are mainly concerned with cost first and foremost, followed by energy efficiency. Moreover, the trend has been more emphasis on replacement windows. Window manufacturers are putting more effort in replacement windows that have up-to-date technology but can still have the look of the window from its original age. The vinyl single hung window remains a popular choice.