Can extra underlayments be installed under vinyl floating floors?

Urban Surfaces' floating floors come with foam pad underlayments applied during the manufacturing process. No extra underlayments are needed. You might think adding extra underlayments is a good idea. However, there is a downside. Adding extra underlayments can:
  1. Damage the flooring’s locking mechanism/click because of the movement they allow.
  2. Weaken the click system exposed to high traffic areas.
If you still want to add extra underlayments, we suggest Leggett & Platt’s Whisper Step. Other brands work as well. Just be sure the underlayments match the specifications of our underlayments, including density, thickness and material type. Please follow the manufacturer specifications and directions for proper installation.