Should laminated floors be nailed down?

Answer: No, never
Explanation: No, laminate floors should not be nailed down. Laminate flooring is typically designed to be a floating floor, meaning it is not secured directly to the subfloor by nailing or gluing. Instead, laminate planks are interlocked and laid over the subfloor or underlayment, allowing for natural expansion and contraction due to changes in temperature and humidity. Nailing down laminate flooring would prevent this movement and could lead to damage. Always follow the manufacturer's installation guidelines for the best results.

Answer: In some cases
Explanation: On stairs

Answer: No, never
Explanation: They are only to be installed with a floating system.

Answer: In some cases
Explanation: Laminate flooring is typically a floating floor but when doing some transitions most pin nail it down