I plan to put these rolls in my garage under a squat rack, and I plan to deadlift over it. If I were to drop 400 pounds from about waist height, would the 8mm thickness be enough to protect the garage floor? I also live in Michigan, so would the cold be a factor at all?

Our 8mm Regrind Rolls in Confetti can be used as flooring for deadlifting. 8mm is the standard thickness used in European commercial gym and is commonly found in American gyms as well. Our Confetti Regrind Rolls are actually more dense than our standard rubber flooring, ensuring that your garage floor will be safe when working out. The cold weather will not affect rubber flooring as it is made from recycled rubber tires. The only thing you will notice is some contraction and expasion as your garage warms and cools if it is not insulated.