Measure your current RV slide cover using a measuring tape. Order a replacement cover from a manufacturer of slide covers, such as Tough Tops or Carefree of Colorado. When you receive your new cover, read the installation instructions carefully, as each manufacturer has slightly different methods.
Open your slide out room to stretch the current cover out to its full length. One of the round "caps" on either end of your roller tube should have a hole in it. Find the hole and stick a cotter pin or other thin metal rod in it, to "lock" your roller tube and keep it from rolling up your current canopy.
Remove the old fabric from the awning rail that is on the wall of your RV as well as the roller tube that stores your fabric. Do this by removing the screws on either side of the awning rail and pulling out the old fabric from one end.
Use a metal file to smooth out any burrs or rough spots on your awning rail, so that your new fabric does not get torn. Clean out any debris in the awning rail using a vacuum cleaner, and spray a lubricant in the rail channel to allow your new cover to slide easily.
Slide the new fabric into the awning rail and the roller tube. It is best to have two people to do this job -- one to slide the new cover onto the rail and roller tube, and another to guide the fabric slowly to its new position.
Remove the cotter pin or other metal device from the roller tube to "unlock" it from its position. Close your slide out room and watch the new slide out cover to see that it is rolling up properly. When you are satisfied that your new awning is in the correct position, replace the two screws on either side of the awning rail, to keep the new cover in place.
