But replacement systems reduce the size of the glass opening. Replacing the whole window. It involves ripping out the entire assembly and installing a new prime window. It also requires installing new trim and making repairs to the siding and interior walls. Fortunately, this method offers the largest selection of materials and styles.
Many manufacturers make windows in a variety of sizes for the remodeling market.
For example, Andersen's tilt-wash window comes in 99 sizes. Prime windows vary widely in price.