Ratings & Reviews for Reflectix R- 21 Attic Wall Unfaced Reflective Roll Insulation 133.3-sq ft ( 16-in W x 100-ft L ) Individual pack
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this product for its ease of installation, lightweight design, and effective insulation performance. Most highlight how it cuts cleanly with scissors or utility knife, staples securely without mess, and can be handled by one person in tight spaces like attics and crawl spaces. Reviewers appreciate that it requires no special tools, protective gear, or masks—unlike fiberglass—and doesn't leave irritating fibers or attract pests. Many report noticeable improvements in temperature control and warmer floors. A few note minor discrepancies in advertised dimensions or express skepticism about R-value claims, but these concerns are far outweighed by overall satisfaction and strong recommendations to repurchase.
Customer review summary generated by AI, including incentivized reviews.Awesome
Very easy to work with
Verified Purchaser
Product not 100 feet long!
Would Not RecommendI purchased this multi-pack order to save money. I cut the 100 foot rolls to 25 foot lengths for installation in my crawl space. But, these rolls and the rolls from my prior order were all short. Some were short by as much as 13 feet!! This is totally unacceptable!!
Verified Purchaser
Not Dependable
Would Not RecommendWhen someone orders something for a customer and gets a date from Lowe’s when it’s gonna be delivered, you should be able to depend on that date. I ordered from Lowe’s because they assured me that I would have my order on Monday. I waited all day long for it as the app said it was set to be delivered on Monday. It didn’t come. Now, on Tuesday, the app says it will be delivered on Friday. FRIDAY! Who’s running their logistics part of the business? The project was scheduled to be completed on Tues...
cathedral ceiling/roof insulation system component
Would Recommendnice not to use w/o trimming size down.
Verified Purchaser
Easy to use and put up.
Would RecommendNice easy to use product.
Verified Purchaser
Less than 100'
Would RecommendPlan on getting less than 97' on the advertised 100' roll. I needed 11' pieces to install in floor joists. After cutting 8 pieces at 11', the remaining piece should have been 12' long. It was less than 9', and unusable. This happened on 2 rolls. They need to recalibrate their machines!!
Verified Pro
Legally found fraudulent
Would Not RecommendFTC v. Superior Products International II, Inc. FTC v. SPM Thermo-Shield, Inc. FTC v. Innovative Designs, Inc. ... and others. The R-values claimed by this kind of material are based on a complete assembly, of which the material itself provides a small fraction of the actual performance. Think about it: if this product actually delivered R-21 in under a half inch, it would be more efficient than fiberglass, rockwool, or any foam. More efficient that the insulation that protects spacecraft aga...
Customer Service
Would RecommendCustomer Service at Store
Verified Purchaser
Extra installation for ceiling
Would RecommendVery easy to handle, light weight , but effective, will buy again
Verified Purchaser
I would buy the product again.
Would RecommendThe shipment arrived a day early, so able to project early. I was glad how easy it was to cut the reflectix with a utility knife. Once pieces were cut I used t-50 stapler to install. process went well and the reflectix covered the walls perfectly..
Very easy job for one person
Would RecommendI used this material to cover the unfinished basement ceiling after an energy audit identified this project to make the house a bit more energy efficient. So far it has been very easy to use, lightweight, and I’m able to use regular scissors to cut around the many obstacles in my 1929 house. Combined with the reflectix foil tape it seems to make a decent air pocket under the floors.
Best price. Lightning fast delivery
Would RecommendBest price. Fast delivery. Shopped for this and Lowes notified me when it came back in stock.
great value
Would Recommendeasy to install, does a great job insulating my garage
Works well
Would RecommendEasy to put up and stays in place well with staple tab. Satisfied with my purchase.
Cuts easily with a box cutter or scissors
Would RecommendNo mess and easy to work with. Used to insulate my garage door and it made a big difference in my very cold garage. I plan to use it to insulate the floor joists as well to help with cold floors because of how easy it was to use.