Usually the original slats are affixed to a structural part of the trailer. This opening will determine the size of a replacement window. Most of the time if you attempt to enlarge the opening, you will get into engineering and structural issues of the trailer's frame and a more expensive upgrade. Once you have the opening's measurements, search the Internet for the largest window that will fit into that space. The differences in size will determine what additional metal, will have to be installed to support and seal the new window. Unless you are familiar with sheet metal fabrication, welding and riveting, this construction may have to be farmed out to finish the installation. Once the windows are installed, to maintain a pleasant appearance, painting the new construction is all that remains. Trying to match the original trailer's paint is very difficult. Changing to a two tone scheme is an easier/less expensive process than repainting the whole trailer. You might consider the addition of contrasting stripes to cover the changes and add interest. The job really isn't too involved, and the mechanics of the installation can be done in a few hours. Add those labour charges to the cost of the windows and you can get a rough idea of the total cost, minus the painting. |