Fortunately, there is no need to buy for a new set of wooden box sash windows for your home. There are now available replacement windows to fit into your existing sashes that take out lesser expenses from your tight budget. Just like the new wooden box sash window, a replacement window is also available in various types of finishes and we can fit the replacement window into your existing buildings sash. It can either be a stained wood or a microporous paint finished wood available in different colors. It may also come as a single glazed wooden box sash window that is typically seen in European countries, or as a double glazed wooden box sash window that is very common in the United Kingdom. Such double glazed replacement windows can maximize the energy efficiency of the window.