Question 30

Spray applied polyurethane foam insulation for roof coverings shall comply with ASTM C 957.

Spray applied polyurethane foam insulation for roof coverings must meet the standards set forth in ASTM C 957, ensuring that the material is suitable for use in roofing applications.

A) ASTM C 957.

This option is correct as ASTM C 957 specifically addresses the requirements for spray applied polyurethane foam insulation used in roofing systems. Compliance with this standard ensures that the insulation meets performance criteria necessary for effective thermal insulation and durability in roofing applications.

B) ASTM C 1029.

Option B is incorrect because ASTM C 1029 pertains to the specification for spray applied rigid cellular polyurethane thermal insulation, but it does not specifically address the requirements for roofing applications. Therefore, it is not applicable to the context of spray applied polyurethane foam insulation for roof coverings.

C) ASTM D 2626.

This choice is also incorrect as ASTM D 2626 deals with the standard test methods for the evaluation of the adhesive properties of roofing membranes, rather than the insulation itself. It does not provide the relevant compliance information needed for spray applied polyurethane foam insulation.

D) ASTM D 4434.

Option D is not correct because ASTM D 4434 addresses the requirements for flexible sheet roofing membranes, which is a different category from spray applied polyurethane foam insulation. This standard does not cover the specific properties and requirements needed for the insulation used in roofing.

Conclusion

In summary, ASTM C 957 is the definitive standard for spray applied polyurethane foam insulation in roofing applications, ensuring compliance with necessary performance criteria. The other options fail to address the specific requirements for this type of insulation, making them unsuitable choices for this question.