With the roof replacement all the items that are attached to the roof will be removed and then the side rails that are on each side of the RV that holds the roof membrane to the RV. After all the components are removed then new Luan in placed on the roof and secured. Holes are made for the antennas and A/C units that are to be put back on the roof. Once the membrane has been layed on top of the Luan then it can be rolled up and glued down to the roof. So when all is done you will have a new roof.