What is flashing tape used for in roof flashing?

• A. To seal joints and seams before applying metal flashing and to improve waterproofing.
• B. To provide color to the roof.
• C. To fasten shingles permanently.
• D. To replace metal flashing.

Answer: (A)

Flashing tape is used to seal joints and seams in a roof flashing system and to boost waterproofing. It is applied to clean, dry surfaces before the metal flashing goes in place, filling gaps and creating a continuous, watertight layer behind the flashing. By bonding to the substrate and to the flashing, it helps prevent water from seeping through at corners, around penetrations, and along transitions, making the overall flashing system more reliable. It’s not for adding color, it doesn’t fasten shingles, and it doesn’t replace metal flashing—the tape enhances the seal where the metal flashing meets other surfaces.