What kind of sheathing is NOT recommended for installation of solid tile roofs?

The recommended option indicates that solid sheathing is not ideal for the installation of solid tile roofs due to a few key reasons. One significant concern with solid sheathing under tile roofs is weight. Solid tile roofs are inherently heavy, and using solid sheathing can lead to an increased load on the structural framing, which may not be adequately designed to support both the sheathing and the weight of the tiles.

In contrast, other types of sheathing, such as engineered wood or composite sheathing, are often lighter and designed to withstand the specific loads and conditions associated with tile roofing systems. They also allow for better moisture management and ventilation, which are critical in maintaining the integrity of the roofing system. Additionally, metal sheathing offers a different set of advantages like durability and heat resistance, but the concern with solid sheathing primarily revolves around its load-bearing capacity and overall compatibility with solid tile roofs.

Thus, solid sheathing is discouraged when installing solid tile roofs because of these structural and practical considerations, making it less suitable compared to other materials that provide better support and performance in such applications.