What tool should technicians use to attach cushion (pad, underlay) to a subfloor?

Technicians should utilize a hammer stapler or cushion adhesive to effectively attach cushion pad or underlay to a subfloor. A hammer stapler is specifically designed for this purpose, allowing for quick and secure fastening of the pad to the subfloor, which is crucial for providing the necessary support and comfort under flooring materials. Cushion adhesive also plays a vital role as it ensures a strong bond between the cushion and the subfloor, preventing movement that could lead to damage or wear over time.

In contrast, a cement mixer is not relevant as it is used for mixing concrete, which does not pertain to flooring installation. A power drill, while versatile, is not typically used for applying cushioning materials; it is more suitable for fastening items like screws and bolts. Similarly, a utility knife is primarily used for cutting materials rather than securing them in place. Therefore, the combination of a hammer stapler and adhesive optimally meets the requirements for properly attaching padding to a subfloor in flooring installations.