Evaluate And Minimize the header rail. Pull the shower door shut and extend your tape measure from just one side to one other. Mark the dimensions about the body header and make use of your hacksaw to cut it to dimensions. Smooth down the Uncooked edge using a steel file.[thirteen] https://www.deluxeshowerdoors.com/services/glass-shower-door-installation-in-needham-ma-deluxe-shower-doors/