Evaluate And Minimize the header rail. Pull the shower door shut and increase your tape evaluate from one side to the other. Mark the dimensions about the frame header and use your hacksaw to cut it to size. Smooth down the raw edge employing a metallic file.[thirteen] X Exploration resource https://www.deluxeshowerdoors.com/services/glass-shower-door-installation-in-needham-ma-deluxe-shower-doors/