What components make up a membrane roof system?

A membrane roof system is composed of several key components that work together to provide effective waterproofing and insulation for a building. The correct response highlights the inclusion of insulation, membrane, and membrane surfacing, which are essential for creating a functional and durable roof.

The insulation serves to enhance energy efficiency by reducing heat transfer, thereby maintaining a stable temperature inside the building. The membrane itself is the primary waterproof barrier, typically made from materials such as PVC, TPO, or EPDM, which are designed to resist weather elements, UV radiation, and other environmental factors. Finally, the membrane surfacing can provide added protection against physical damage and further assists with drainage, ensuring longevity and performance of the roofing system.

Understanding these components is crucial for roofing professionals, as each plays a significant role in the overall effectiveness of the roof system and contributes to its ability to withstand different weather conditions while maintaining the building's energy efficiency. The other provided options do not encompass all necessary elements that comprise a complete membrane roof system, thus underscoring the correctness of the chosen answer.