I put 2 pieces of 2x4 foot celing tile uder them 8 bucks,reflects great,and absorbs any water, and dissaptes it to be dry in no time,also insulates any grow area,easy to cut and work with,grat shit for the home grower,in my grow area its now on every wall ceiling and floor,@ 2-4 bucks a panel u cant do better for refeltion and insulation