Which is better, heat barrier roll or paint for my house in San Antonio? Home » QA » Which is better, heat barrier roll or paint for my house in San Antonio? I am about to install a heat barrier for my house in San Antonio, TX. Which is better, the roll or the paint? I read where I would need a perforated foil, due to condensation. Answer: The radiant barrier will normally outperform the IRCC coating, depending on the application. Most radiant barriers sold for attic applications come perforated.