First ordered 1 ROLL 6-21-17 after being highly recommended by a trusted friend, (WHO WAS EXTREMELY PLEASED WITH THE RESULTS). I just began installing under the roof trusses and was VERY pleased with the durability (TUFF STUFF) using the RG-U-1000. I was using a slap type stapler and missed the rafter several times due to extreme conditions, and it DID NOT TEAR, WOW it's extra TUFF STUFF! We're looking excitingly at the finished results to lower our energy consumption thus lower expenses for YEARS to come, and hey folks in my opinion the power companies are NOT going to lower their cost per kwh in the years to come. Thanks Radiant Guard for a great product and the sale price, discount code and FREE s/h. Robert in Fla.