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Stud Spacing: 24 (Inches)

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Reflectix R- 21 Attic Wall Unfaced Reflective Roll Insulation 50-sq ft ( 24-in W x 25-ft L ) Individual pack

Name: Reflectix R- 21 Attic Wall Unfaced Reflective Roll Insulation 50-sq ft ( 24-in W x 25-ft L ) Individual pack
Brand: Reflectix
SKU: 3011904
Price: 29.98 USD
Rating: 4.7 (528 reviews)

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4.7

528

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Reflectix insulation has over a dozen money-saving applications for around the home. The list of uses includes crawl space, radiant floor, attic and walls, just to name a few. The product is easy to handle and install. All you need are scissors, a staple gun, safety goggles and a tape measure. Since our insulation is fiber free, no protective garments or respirators are required.

24-In double reflective, double bubble insulation is easy to handle and offers quick installation
R-values range from R-3.0 to R-21 depending on the applications
Applications: cathedral ceiling, crawl space, radiant floor, wall, HVAC duct, water pipe, garage door, knee wall and water heater
A tape measure, staple gun, utility knife and safety glasses are all you need for installation (not included)
A fiber and itch free insulation product
Class A/Class 1 fire rating
Inhibits condensation and resists growth of fungi, mold and mildew
No nesting characteristics for birds, insects or rodents
Made at an ISO 9001:2008 manufacturing location

General
Package Type	Individual pack	Package Count	1
Total Package Quantity	1	Framing Type	Wood studs
Insulation Type	Reflective

Dimensions
Bag Dimensions (L x W x D)	24 x 10 x 10	Thickness (Inches)	0.3125
Coverage Area (Sq. Feet)	50	Width (Inches)	24
Length (Feet)	25	R-Value per Inch	3
Package Weight (lbs.)	2.8	Maximum R-Value	21

Features
Faced/Unfaced	Unfaced	Sound Barrier	No
Formaldehyde Free	Yes	Stud Spacing (Inches)	24
Reflective	Double	Vapor Retardant	Yes

Certifications
CA Residents: Prop 65 Warning(s)	No	ENERGY STAR Certified	No

Compatibility
For Use in Basements	Yes	For Use in Garage Doors	Yes
For Use in Crawlspaces	Yes	For Use in Masonry	Yes
For Use in Ceilings	Yes	For Use in Plumbing	Yes
For Use in Attics	Yes	For Use in Vents	No
For Use in Doors	No	For Use in Walls	Yes
For Use in Duct	Yes	For Use in Windows	Yes
For Use in Electrical	No	Fits 2 x 4 Walls	Yes
For Use in Floors	Yes	Fits 2 x 6 Walls	Yes

Miscellaneous
UNSPSC	30141500

Check out the Best Selling Roll Insulation on Lowes.com

Review

4.7 out of 5

528 Reviews

96% Recommend this product

Ratings may include incentivized customer reviews.

+ 27 images

What Customers Are Saying

The product is effective at insulating various areas and helps regulate indoor temperatures. Customers report it is lightweight, reflective, and easy to install. However, some note it may be delicate and not suitable for high-traffic areas. Overall, the majority of customers are satisfied with the product's performance and quality.

Customer review summary generated by AI, including incentivized reviews.

528 Customer Reviews

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Highly Recommend!

Would Recommend

This insulation is thick and sturdy. I really appreciate how it holds up even if you cut it.

IsabelMarch 2, 2026
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Works as intended.

Would Recommend

Easy to work with and to customize.

JohnFebruary 7, 2026
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No Way

Would Not Recommend

Ordered online. Never received. Uber driver kept it.

OoooFebruary 6, 2026
Verified Purchaser

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Excellent product

Would Recommend

It’s easy to work with does the job

JR60February 2, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/52718e73-3e71-59ca-afae-731d7be8bd59

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Roll Insulation

Would Recommend

Excellent product. was anlevto wtap my well pump and cut in small sections foru well filter

CindylouFebruary 1, 2026
Verified Purchaser

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