Can a reflective barrier be stapled to the floor? Home » QA » Can a reflective barrier be stapled to the floor? We had someone come out to our home to quote installation of a reflective barrier. Is it okay to staple the barrier to the floor? Answer: It is not advisable — just lay it on the floor like a blanket. If you can install the radiant barrier on the underside of the roof rafters, that is the preferred application.