Whose recommendations must be followed for installing the product?

Whose recommendations must be followed for installing the product?

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

Answer: (B)

Manufacturers’ installation recommendations must be followed because they spell out the exact substrate prep, materials, mixing, application, environmental limits, and curing steps the product was designed and tested to use. Installing according to these instructions ensures the product will perform as intended, maintains any warranty, and meets the tested performance criteria. Building codes and inspectors expect compliance with the manufacturer’s instructions, and while the contractor or supplier can offer guidance, the official installation method is provided by the product’s manufacturer.