Whose recommendations must be followed for installing the product?

• A. Contractor
• B. Manufacturer of the product
• C. Building code official
• D. Supplier

Answer: (B)

Manufacturer’s installation recommendations set the standard for how to correctly place this product because those guidelines are tailored to how the product was designed to perform in real conditions. They cover substrate prep, fasteners, adhesives, spacing, sealants, environmental limits, cure times, and sequencing. Using the manufacturer’s methods helps ensure the product works as intended, maintains the warranty, and reduces the risk of failure or damage. Building codes establish minimum safety requirements and may reference the manufacturer’s instructions, but the detailed steps come from the product maker. The contractor implements the work according to those instructions, while the supplier provides the materials but does not dictate installation procedures.