Materials used for Sprayed foamed-in-place roof insulation on type III and IV buildings shall comply with which standard?

The correct choice is based on the specific standards that govern the materials used in construction, particularly for sprayed foamed-in-place roof insulation. ASTM C 1029 outlines the specifications for the various types of rigid cellular plastics used in insulation, which is crucial for ensuring that the materials perform as required in type III and IV construction. This standard covers the requirements for physical and thermal properties, ensuring that the insulation provides the intended energy efficiency and performance in the building's roofing system.

The other standards mentioned are relevant in construction but pertain to different aspects. ASTM C 1028 deals with the coefficient of friction of flooring materials, ASTM D 1622 pertains to the density of rigid cellular plastics, and ASTM E 84 addresses the surface burning characteristics of building materials. While these standards are important, they do not specifically focus on the requirements for the materials used in sprayed foamed-in-place roof insulation in the context of type III and IV buildings. Thus, ASTM C 1029 is the standard that directly aligns with the question regarding insulation materials in this category of construction.