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Which of the following best describes re-covering an SPF thermoplastic or thermoset roofing system?

  1. Removing all existing rooftop equipment

  2. Applying a new roof coating

  3. Insulation boards may be used as separation layers over fully adhered or mechanically fastened single ply systems

  4. Installing additional skylights

The correct answer is: Insulation boards may be used as separation layers over fully adhered or mechanically fastened single ply systems

The best way to describe re-covering an SPF (Spray Polyurethane Foam) thermoplastic or thermoset roofing system is indeed the option about using insulation boards as separation layers. In the context of roofing systems, re-covering involves adding new layers on top of an existing roofing system, and in many cases, insulation boards can provide an essential thermal barrier and moisture protection. They are often utilized as a separation layer over fully adhered or mechanically fastened single-ply systems to ensure proper insulation performance and to facilitate better adhesion for the new roofing materials. This approach is particularly beneficial as it enhances energy efficiency and supports the overall integrity of the roofing system. It reflects common practices in roofing where insulation is critical not only for thermal performance but also for preventing issues such as moisture retention that could lead to more serious roof degradation over time.