I will need 4 of these in my garage for space I have for a garage gym. Will I need to attach them with something, so they don’t slip apart? I want it to be like one piece of flooring.

To connect multiple Premium Mats together, we recommend using our Double Sided Carpet Tape. You would place this tape around the edge of the mats and along the seams, and it will attach the mats to your subfloor.