Best solution to protect the floor while painting the walls
Drop Cloths
The most common solution, is to use canvas drop cloths. This has been the choice of the pros for many, many years.

Heavy Paper
36 mil paper is a common choice when working over hard flooring. It provides good spill protection, while also providing a bit of added drop protection.

Masonite Sheets
In higher end homes, where flooring can be quite expensive (and may be installed before construction is completed). 1/8&quot; - 1/4&quot; Masonite sheets can be laid over a medium weight or Rosin paper, to provide good spill and drop protection.