What is spaced sheathing typically used for?

Spaced sheathing is primarily utilized in conjunction with wood shingles or shakes. This technique involves the installation of sheathing boards with spaces in between, allowing for proper ventilation and drainage. Wood shingles and shakes are natural materials that benefit from this ventilation as it helps to reduce moisture buildup, which can lead to decay or mold growth. The gaps in the sheathing permit air circulation, thereby extending the life of the roofing material and enhancing overall performance.

In contrast, the other options do not typically require spaced sheathing. Composition shingles, for instance, are designed to lay flat against a solid decking, and their installation does not necessitate air gaps. Metal roofs also have different requirements and are often installed over solid sheathing, where ventilation methods differ. PVC roofing is a synthetic material that is usually installed on a smooth, solid surface without the need for spaces, as its design effectively manages water and moisture. Therefore, the use of spaced sheathing is distinctively aligned with wood shingles or shakes, making this option the most appropriate for that specific application.