The base layer, usually made of plywood or OSB (oriented strand board), provides the structural foundation for the roof.

• Underlayment: A protective barrier placed on top of the decking, often made of felt or synthetic materials, to prevent moisture from seeping through.

• Waterproofing Membrane: Found in areas prone to water exposure, such as valleys or near chimneys, this layer adds an extra level of protection against leaks.

• Roof Covering (Shingles, Tiles, or Metal): The outermost layer, providing weather resistance and aesthetic appeal. Different materials are used depending on style, durability, and regional conditions.

• Flashing: Metal strips installed around roof edges, chimneys, and vents to direct water away from vulnerable areas.

• Ventilation Components: Vents and ridge caps allow airflow to reduce moisture and heat buildup in the attic.
  Each layer contributes to the roof’s strength, durability, and ability to withstand the elements