Also See What Makes Up A Roofing System? How Long Does A Metal Roof Last? Choosing Your Contractor Find a Marco Dealer Closure Our full line of closure products delivers a snug fit for barns, warehouses, house roofs, and other types of metal roof structures. Ventilation Superior material quality and innovative product design set our ventilation solutions apart, giving you more for your money. Fasteners We offer everything you need for superior metal cladding installation, right down to the fasteners that hold it all together. Flashing Our flashing solutions are made of EPDM or silicone and compounded specifically for maximum resistance to weathering. Sealants Vital to the energy efficiency and integrity of your building, our sealant solutions withstand nature’s worse. Underlayment Our proven synthetic and self-adhering underlayment solutions provide superior protection for your roof and everything underneath. Accessories From snow guards and standing seam clips to our foam spacer system for retrofits, our accessories have you covered. Resources Dig deep with technical tools, reference charts, installation videos and more. Choosing The Right Fastener Roofing And Ventilation Terms Technical Tools News Keep up to date with the latest news and info from Marco and around the industry. Being Cold-Weather Ready Means More Than Warm Clothing. The Right Underlayment Is Just As Important.