I currently have 1/2” interlocking EVA foam tiles for my flooring. Can you overlay the 1/4” rubber rolls? My room size is 16’x15’. When overlaying, would a protective layer need to be applied between the foam and rubber for a secure install?

You can install our 1/4" Tough Rubber Rolls over an existing foam floor. We would recommend when installing rubber over any foam base to add a 1/4" plywood over the foam to ensure the rubber flooring doesn't separate when working out. If installed directly over the foam tiles, there is potential for a tripping hazard due to the foam depressing when walking on the floor.