What type of roof can NOT be recovered?

What type of roof can NOT be recovered?

• A. Slate
• B. Tile
• C. Shake
• D. Slate, tile, and shake

Answer: (D)

Recovering a roof means installing a new roof covering over the existing one without removing the old material. Some roof coverings aren’t eligible for this overlaid treatment because the material is too heavy, too brittle, or too fire-prone to support an additional layer safely and effectively. Slate, tile, and wood shake all fall into that category. They are either very heavy or easily damaged, and they typically require inspection and replacement of the underlying deck, proper flashing, and ventilation that a new layer over them would prevent. Shake, in particular, is often combustible and treated with fire considerations that discourage overlay. Because of these issues, none of these materials are suitable for recovery, so a roof made of slate, tile, or shake generally must be removed and replaced rather than recovered.

Recovering a roof means installing a new roof covering over the existing one without removing the old material. Some roof coverings aren’t eligible for this overlaid treatment because the material is too heavy, too brittle, or too fire-prone to support an additional layer safely and effectively.

Slate, tile, and wood shake all fall into that category. They are either very heavy or easily damaged, and they typically require inspection and replacement of the underlying deck, proper flashing, and ventilation that a new layer over them would prevent. Shake, in particular, is often combustible and treated with fire considerations that discourage overlay. Because of these issues, none of these materials are suitable for recovery, so a roof made of slate, tile, or shake generally must be removed and replaced rather than recovered.