For tile roofing, when should valley metal be extended to the top of the tile?

For tile roofing, when should valley metal be extended to the top of the tile?

• A. A lead skirt is used
• B. A lead skirt is not used
• C. Only for slate tiles
• D. Only for concrete tiles

Answer: (B)

The key idea is that valley flashing on a tile roof should be tied into the tile profile so water has a clear, uninterrupted path into the valley. Extending the valley metal up to the top edge of the tile ensures any water that gets between tiles is directed into the valley and away from the roof. A lead skirt isn’t used in this setup because it sits under the tiles and can trap debris or hinder proper drainage, making sealing harder and potentially causing issues over time. This approach isn’t limited to a specific tile type; the metal is simply extended to the top edge to maintain a clean, continuous drainage plane.

The key idea is that valley flashing on a tile roof should be tied into the tile profile so water has a clear, uninterrupted path into the valley. Extending the valley metal up to the top edge of the tile ensures any water that gets between tiles is directed into the valley and away from the roof. A lead skirt isn’t used in this setup because it sits under the tiles and can trap debris or hinder proper drainage, making sealing harder and potentially causing issues over time. This approach isn’t limited to a specific tile type; the metal is simply extended to the top edge to maintain a clean, continuous drainage plane.