1. Roof Decking: This is typically the structural component that forms the base for the metal roof. Common materials for roof decking include plywood, oriented strand board (OSB), or metal purlins.
  2. Underlayment: A roofing underlayment is a layer of material installed between the roof deck and the metal panels. It serves as an additional barrier to prevent moisture infiltration. Common underlayment types include felt paper, synthetic underlayment, and self-adhering membrane.
  3. Ventilation: Adequate roof ventilation is essential to prevent moisture buildup in the roof space. Proper ventilation systems include ridge vents, soffit vents, and/or attic fans, depending on the specific design of the roof.
  4. Insulation: Insulation can be installed under the metal roofing to regulate temperature and energy efficiency. Common types of roof insulation include fiberglass batts, spray foam insulation, or rigid foam boards.