Our Jumbo Soft Tiles do not come with a warranty due to them being made of foam. Depending on the carpet they are going over, there is a potential for some color transfer. This would be an issue with a white carpet or very light carpet. If you do have a light colored carpet you can put a plastic sheet under the tiles to prevent any color transfer. Since these tiles are made of foam, they will indent under the weight of the heavy gym equipment. If that is an issue, we do have rubber tiles that are better able to handler the weight of heavy gym equipment. Our 8mm Strong Rubber Tiles and our 3/8" Sport-Lock Tiles are great alternative products for your installation.