In March of 2011, I installed a MasterShield radiant barrier in my attic. On the advice of Oak Ridge National Testing Laboratory, I stapled it to the roof rafters inside my attic. Pre-cutting the quilted aluminum lengths makes installation easier. I also carried a ten-inch x ten-foot one-inch thick board to stand on. Starting at one end, I wallpapered the joists leaving the top one foot open to allow air movement thru my continuous ridge vent. I made sure that the chutes above the soffit vents were open to allow air movement thru the attic. The gable end of the house was also wallpapered with radiant barrier. I noticed as the ceiling got more and more covered the temperature inside the attic dropped. On a very warm, sunny early spring morning the temperature fell from about 100 degrees to about 65 degrees or so.
The rest of the story is a great success. My power bills in the horribly hot summer 2011 in Omaha, Nebraska was a virtual clone of the bills in a mild 2010. What happened? The total $ spent per month went down by 50% with NO lifestyle changes. I was amazed. Even a walk down the 2nd story hall was cooler than I remembered. The southwest bedrooms were finally comfortable even in late afternoon and evening in our scorching hot July. So I saved a bunch in cooling bills. Winter heating charges were lighter, too.
Would I recommend MasterShield double-sided radiant barrier? Yes! Will I sell it to the general public? Probably not. Why? There is too much liability. Picture an employee crawling around inside an attic. The chance he may be injured is a little too much. In addition, the ever-present liability of a worker slipping off a roof rafter and popping a hole in John Q Public’s bedroom ceiling is a little too real. I ordered some product for a good customer’s college-age son to install. It saved a ton on their electric heating bill. Even more, was saved on their A/C this scorcher of a summer (2012). They installed the barrier by rolling it out over the existing insulation with a slight overlap at the seams.