1.1 This specification establishes requirements and test methods for the materials, dimensions, camber, impact strength, expansion, and appearance of extruded single-wall soffit manufactured from rigid (unplasticized) PVC compound. Methods of indicating compliance with this specification are also provided. 1.2 The use of PVC recycled plastic in this product shall be in accordance with the requirements in Section 4. 1.3 Rigid (unplasticized)