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Butyl rubber Flashings

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Shop Roof Flashing for Chimneys, Decks and Roof Edges


Roof flashing is an important roofing component used around areas where water may collect or travel between surfaces. It helps direct runoff away from roof transitions, including chimneys, decks, doors, gutters and roof edges. Available in materials such as galvanized steel, aluminum, butyl rubber, rubberized asphalt and plastic, flashing options can support repairs, replacements and new construction projects.


Benefits of Roof Flashing

  • Water Direction: Flashing helps direct rainwater away from seams, joints and transitions where roofing materials meet.
  • Transition Support: Metal, rubberized and plastic flashing options help cover vulnerable areas around chimneys, walls, decks and roof edges.
  • Material Flexibility: Galvanized steel, butyl rubber, rubberized asphalt, plastic and aluminum flashing support different roof repair and exterior detail projects.
  • Project Versatility: Flashing for chimneys, decks, doors, gutters and egress windows can support a variety of exterior applications.


Key Features of Roof Flashing

  • Galvanized Steel Flashing: Galvanized steel flashing offers a sturdy metal option for roof transitions, edges and other areas that need durable coverage.
  • Aluminum Flashing: Aluminum flashing is lightweight, easy to handle and suitable for many roof repair or exterior detail projects.
  • Plastic Flashing: Plastic flashing can be useful for certain exterior applications where a lightweight, nonmetal material is preferred.
  • Length Options: 10-foot, 10.2-foot, 10.5-foot and 31.75-foot lengths help you plan coverage for different project sizes.
  • Use-Specific Options: Choose flashing for chimneys, decks, doors, egress windows and gutters to match the product to your project area.


How to Choose Roof Flashing

  • Identify the Application Area: Choose flashing based on where it will be installed, such as around a chimney, along a deck connection, near a door or beside gutters.
  • Match the Material: Select aluminum flashing for lightweight handling, galvanized steel for many metal applications, butyl rubber for flexible coverage or rubberized asphalt for self-adhering needs.
  • Measure the Run: Calculate the length needed and allow for overlap so the flashing can cover the transition as intended.
  • Coordinate With Roofing Materials: Choose flashing that works with nearby shingles, underlayment, siding or roof panels.
  • Plan Supporting Supplies: Many projects may require compatible sealants, fasteners, underlayment or roofing cement.


Roof flashing helps manage water around chimneys, decks, doors, gutters and roof edges where surfaces meet. Whether you need flashing for deck or your chimney, Lowe's has everything you need for next roofing project.