SPC flooring can be installed with or without padding, depending on the specific product and installation preferences:

1. **Attached Underlayment**: Many SPC flooring options come with a built-in underlayment, which adds cushioning, sound absorption, and moisture barrier properties. This can enhance comfort and reduce noise.

2. **Separate Underlayment**: If the SPC flooring does not have an attached underlayment, you can choose to install a separate underlayment. This can provide additional insulation, soundproofing, and moisture protection.

3. **Transition Strips and Molding**: These accessories are often used to create a seamless transition between different flooring types or to cover expansion gaps along walls and doorways.

4. **Flooring Adhesives**: While most SPC flooring features a click-lock design, some installations may benefit from adhesive to secure the planks further, especially in commercial settings.

5. **Finishing Products**: Baseboards or quarter-rounds can be used to finish the edges and give a polished look to the installation.

Choosing the right accessories can enhance the performance and appearance of your SPC flooring.