If a manufacturer's installation instructions conflict with local building codes, which should be followed?

The correct answer is to follow local regulations when they conflict with a manufacturer's installation instructions. This is because local building codes are established by governing bodies to ensure safety, health, and welfare standards are maintained within the community. These codes take precedence over manufacturer guidelines because they are legally enforceable and are created based on extensive research and evidence tailored to specific regional conditions.

Manufacturers provide installation instructions based on their product specifications, and while they are important for optimal performance and warranty considerations, they cannot supersede local laws aimed at protecting the public and the environment. In cases of conflict, adherence to local regulations ensures compliance with safety standards and legal obligations, which is crucial for any construction or installation project.

Choosing to follow only manufacturer instructions or an equal weighing of both would risk violating local laws, which could result in penalties or safety issues. Ignoring either source is not advisable, as following neither could lead to using products incorrectly and potentially endangering public safety or failing inspections.