What is the recommended application surface for asphalt shingles?

The recommended application surface for asphalt shingles is continuous or closely spaced wood plank decking. This type of surface provides the necessary support and adherence for asphalt shingles, ensuring they lay flat and are securely installed. The solid nature of continuous decking minimizes gaps where wind and water could potentially infiltrate, thus enhancing the roof's overall durability and effectiveness in protecting against the elements.

In contrast, open framing lacks the contiguous surface needed for effective shingle application, as it can lead to unsupported areas that may compromise the integrity of the roof. Cement board, while useful for certain applications, is not typically designed for roofing systems and may not provide the same benefits as wood plank decking regarding shingle installation. Metal decking, although it serves well in certain structural applications, also differs structurally and may not accommodate asphalt shingles without additional measures for compatibility. Therefore, continuous or closely spaced wood plank decking is the optimal choice for the application of asphalt shingles, ensuring a secure, long-lasting roofing system.