Mission tile roofs require a treated- wood nailer under each row of tiles. The nailer is generally

Question

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The nailer must be able to support the weight and pressure of the tiles, and also provide a solid fastening surface for the nails. A 2x2 lumber may not provide enough support, while a 2x4 lumber may be too thick and heavy. A 2x3 lumber is a good compromise and is commonly used as a nailer for mission tile roofs. However, in some cases, a 2x4 may also be used if extra support is needed. Therefore, the best choice(s) are B or C, which are included in option E.

Mission Tile Roofs Require a Treated- Wood Nailer Under Each