Different Roof Layers

As a homeowner, understanding the different roof layers is crucial for ensuring its longevity, durability, and effectiveness in protecting your home. At Shepherd Roofing and Renovations, we believe in empowering our clients with knowledge about their roofing systems. In this guide, we’ll delve into the different layers of a roof, explaining their importance and purpose in detail.

Roof Decking

Roof decking, also known as sheathing, is the foundational layer of the roof. It provides structural support and stability to the roof. Roof decking serves as a base for other roofing materials and helps distribute the weight of the roof evenly across the structure.


Underlayment is a moisture-resistant barrier installed over the roof decking. It acts as a secondary layer of protection against water infiltration, protecting the roof structure and interior of the home. Underlayment helps prevent leaks caused by wind-driven rain, ice dams, or damaged roofing materials.


Flashing is a thin, waterproof material installed around roof penetrations and joints. It prevents water from seeping into vulnerable areas of the roof, such as chimneys, vents, and valleys. Flashing directs water away from critical areas and helps maintain the integrity of the roof system by preventing water damage and leaks.

Drip Edge

A drip edge is a metal strip installed along the edges of the roof. It directs water away from the fascia and into the gutters, preventing water damage and rot. Drip edge helps protect the underlying structure of the roof and promotes proper drainage, prolonging the life of the roofing system.

Roofing Material

Roofing material is the outermost layer of the roof that protects it from the elements. It shields the roof from rain, snow, hail, UV rays, and other weather conditions. Additionally, roofing material enhances the aesthetic appeal of the home while serving as a durable barrier against environmental elements.

There are various options for roofing materials, including:

  • Asphalt Shingles: One of the most common roofing materials, available in a variety of colors and styles.
  • Metal Roofing: Offers durability and longevity, with options like steel, aluminum, copper, or zinc.
  • Wood Shingles or Shakes: Provide a natural look but require more maintenance.
  • Clay or Concrete Tiles: Known for their durability and aesthetic appeal.
  • Slate: Offers a high-end, elegant look and exceptional durability.
  • Synthetic Roofing Materials: Made from rubber, plastic, or composite materials, offering durability and versatility.

Ridge Vent or Roof Ventilation System

Roof ventilation systems allow air to circulate in the attic space. Proper ventilation helps regulate temperature and humidity levels, preventing moisture buildup and mold growth. Ridge vents, soffit vents, and other ventilation components ensure the roof longevity and improve energy efficiency by reducing heat buildup in the attic.


Understanding the different layers of your roof is important for maintaining its integrity and protecting your home from water damage, leaks, and other issues. By partnering with us, you can ensure your roof is expertly constructed with quality materials and craftsmanship. Contact us today to learn more about our roofing services and how we can help safeguard your investment for years to come.