Some essential components are required to build a long-lasting and durable roofing system. The roofing system includes decking boards or sheathing, flashing, vents, soffit, gutter, underlayment, shingles, tiles, base sheet and fascia. Decking boards or sheathing is the foundation of a roofing system while flashing directs water away from critical areas such as skylights and chimneys. Vents help to circulate air through the attic, while the soffit covers the underside of the roof overhang, protecting the eaves from moisture damage. Gutters collect rainwater and direct it away from the building, while underlayment provides additional protection against water damage. Shingles and tiles are the outermost layers of the roofing system, while base sheets provide a smooth surface for applying other roofing materials. Fascia supports the gutter system and provides a finished look to the roofing system. Roofing companies can help you keep your roof in check.