Resources We've put this list of topics together as a resource as you explore our site. Click on any topic below to open a PDF for more information. Counter Flashing Systems Gable and Rake Flashing Metal Eaves – Conditions – Ice Dams Metal Roof Panel Expansion and Contraction Metal Roof Systems Ridge Caps Roof Membrane Protection Roof Panel Flashing Pipes Roof Panel Penetration Roof Support Systems Snow Guards Snow Retention System Commentary Standing Seam Roofs Thickness and Weight of Steel Metals Valley Flashing Installation