Measure and cut the header rail. Pull the shower door closed and lengthen your tape measure from one aspect to another. Mark the size over the frame header and make use of your hacksaw to cut it to size. Smooth down the raw edge utilizing a metal file.[13] X Analysis https://www.deluxeshowerdoors.com/services/glass-shower-door-installation-in-needham-ma-deluxe-shower-doors/