How should most carpet cushion (pad, underlay) seams be addressed?

Carpet cushion seams should be addressed by using tape. Taping the seams creates a secure bond between adjacent pieces of cushion, which helps to prevent movement and ensures a smooth surface under the carpet. This method effectively reduces the chance of the seams separating over time, which could lead to issues like wrinkles or uneven surfaces that may affect carpet performance and appearance.

Using tape also simplifies the installation process, providing a quick and efficient way to manage seams without the mess associated with adhesives or the labor-intensive approach of stitching. Additionally, the use of tape allows for easier future replacement or repairs, as the cushion can be lifted more easily compared to glued or stitched options.

Other methods like gluing or stitching can complicate the installation process and may not provide the same level of flexibility when adjustments or repairs are needed later on. Leaving seams unjoined would result in an unstable and uneven installation that could detract from the overall quality of the carpet flooring. Thus, taping is the most recommended practice in order to achieve a reliable and high-quality carpet installation.