What does single-ply roofing primarily consist of?

Single-ply roofing primarily consists of a single layer of flexible membrane, which is designed to be a lightweight and efficient roofing solution. This type of roofing is commonly used in commercial applications and is popular due to its ease of installation, cost-effectiveness, and resistance to UV rays and weather-related damage.

The single membrane can be made from various materials such as Thermoplastic Olefin (TPO), Polyvinyl Chloride (PVC), or Ethylene Propylene Diene Monomer (EPDM). Each of these materials offers unique benefits in terms of durability and performance. This single layer is adhered, mechanically fastened, or ballasted to the roof deck, providing a seamless and waterproof barrier that is essential for protecting the building beneath.

Other roofing options presented, such as multiple layers of felt, multiple types of shingles, or metal sheets, do not reflect the defining characteristic of single-ply systems. Multiple layers generally indicate a built-up roofing system, while shingles are often associated with residential roofing, and metal sheets represent a distinct roofing material category altogether. Thus, the flexibility, simplicity, and effectiveness of a single flexible membrane make it the hallmark of single-ply roofing.