This stuff is Amazing!It really works.Super simple to install.

I live in Texas. I used this in my attic to keep the heat from moving into my house in the summer. The temperature was 107 degrees this week. Attics can often reach 140 degrees here. I laid this out over my pink insulation. I was skeptical but hopeful. The difference in the interior temperatures inside my house was mind-blowing. For the first time in years, my house actually felt cool in the summer. I have top-notch, oversized, well-maintained equipment, which constantly struggles to fight the Texas heat. If this could do this for my house in these extreme conditions, I could not imagine a situation it could not help control. This was easy to install. I cut the sheets to size before taking them up. I used a long stick with a nail to drag them into place. Heavy-duty material did not rip. I recommend this product whole heartedly.

We haven't gotten it all installed yet, mostly because it is already too hot in the attic here in southern NM and my kids and I started out not knowing what we are doing, but we are refining our technique as we go.For those in a similar situation, I have a few recommendations. Do not take the whole roll up in the attic. Go up, measure the length of sheet you'll need, and add 6-12 inches. Go back down and cut that measurement. Take it up and install with a staple gun to the rafters, not directly to the roof. Once you have done that, you'll be able to see if your measurement for the first sheet was appropriate for your space. Figure out how many sheets of that size you are likely to need, go back down, and cut that many. Work on the big spaces first, the ones where you won't need to make a bunch of cuts for pipes or trusses. Then, go back and fill in the gaps, overlapping the sheets by an inch or two. Then secure those overlaps with aluminum tape. Work one section of the attic at a time so all measurements are the same at time of cutting and you don't confuse which section of the attic goes with which sheet.I found it essential for 2-3 of us to work together, one holding the unstained sheet taut and the other stapling. I installed the first sheet by myself, and while it worked and wasn't a total disaster, it also was incredibly hard to manage it all at the same time and that piece of the barrier looks like it was installed by a drunken monkey. It is still effective, though, and only plumbers and electricians will ever see it, so that doesn't really matter. Where we have installed it, so far ther is a 15-20° difference between where the barrier is installed and the plain roof, which is fantastic!Remember to leave a few inches gap at the top and bottom for air flow/ventilation and don't cover your vents or turbine openings.I expect this to save me a lot of money in summer and winter ver the rest of my time in this house. It is difficult for me to install as a fat, out of shape, 50 year old woman, but the difficulty is well worth it if it saves me hundreds of dollars in energy each year.

Remember that guy in Phoenix that died in someone's attic doing HVAC during the summer when it was one hundred and a billion degrees out? I was almost that guy.So I'm up in the attic, doing HVAC for the new addition on the house. Pretty straightforward stuff, and it's Phoenix. IT'S. ALWAYS. HOT. So attic heat - no problem. Well, in my infinite wisdom I purchased this product ahead of time. I'm going up there anyway, I might as well install some reflecto-barrier while I'm at it. Now - if you're going to be working in the attic, it's wise to lay down some boards to work on, instead of laying in fiberglass insulation. Let me tell you how much fun it is to go up there, sweat like a madman, have all your pores WIDE OPEN, and roll about in fiberglass. The itch is real people. So I figure - why not double my reflective capacity and put down the plywood with the reflective barrier already on it! Genius right?So there I am, up in the attic, 118 degrees outside, literally no airflow. I've got the radiant roof pouring heat in from outside. I've got plywood with reflecto-space-blanket coating underneath me. Might as well be a solar oven up there. I dropped 10lbs of water weight. I might have even seen Jesus. Somewhere in there just shy of dying from heat exposure I realize I've got this amazing shiny stuff that I need to staple to the rafters. I cut a slice, even the barrier from just sitting there is about 140-billion degrees. I'm feeling fortunate for my gloves... incredibly stupid for doing this in the summer... and not sure if I'm dead or alive...*whack* first staple in. *whack* next one in. Slowly but surely, maintaining professional levels of alignment, equal spacing on the staples, and having a great conversation with the rainbow unicorn kitty (who knew they could talk?) I got the first piece in place. What a relief. The kitty thinks it's sparkly, and it looks like a disco. We need some better music. But we decide to put up more, to really complete the theme. Then when everyone else shows up it will be a real party.Next piece of barrier cut. *whack*whack*whack* staples going in. Let me tell you, when this stuff touches your skin - it's like the fire of a thousand suns. All that reflective power must concentrate the reflected energy into one tiny little spot. It even sizzles a little bit. *whack*whack*whack* a few more staples in, and the second barrier is up. Look kitty - it looks like a spaceship! Bet the guys on the moon didn't have it this good.I slide underneath the area with the reflective barrier and I swear the temperature dropped 15 degrees. NO JOKE. Lying there was like heaven, if heaven was 120 degrees, dark, and itchy. Kitty says the party is canceled... but I can't find kitty anymore. Oh well, real friends are hard to come by, and rainbow unicorn kitties are too needy anyway. I happen to like this music anyway.All jokes aside, you could literally feel the temperature change between the area with the barrier and the area without. It is not fun to put up, Imagine working with a 4-foot wide piece of silver saran wrap - without all the stretch. If you get it lined up just right, you can get it installed amazingly tight and it's quite impressive. I used 1/2" staples, and they held amazingly well, even with all the tugging and fussing I was doing to get it in place. If I didn't get it just right, the stuff doesn't tear easily, but with a little effort I could rip it off of the staples and reposition. The material seems to be tear resistant, so rips won't continue if you do mess up and have to pull a staple or two through.Great product, would definitely buy again, once I use up this roll.