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Reflectix Reflective Radiant Barrier Insulation Roll

Reflectix Reflective Radiant Barrier Insulation Roll

4.8· 307 ratings

Best price now

$22.48at Lowe'sObserved at 3:04 PM

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Our take on the Reflectix Reflective Radiant Barrier Insulation Roll

Reflectix is a double-bubble foil roll that blocks radiant heat rather than slowing conductive heat like fiberglass. This 16 in. x 25 ft roll covers about 33 sq. ft. and staples to rafters, joists or studs in attics, crawl spaces, walls and floors. Its stated R-value runs R-3.7 to R-21 depending on how much air space you leave on each side, so installation detail matters more than the roll itself. At $22.48 at Lowe's as of November 4, 2026, it sits at the low end of its recent range, with 4 stores pricing it new.

Best forAttic rafters and knee walls where you want a radiant barrierCrawl space and floor joistsGarages, barns and metal buildingsDIYers who want to staple, not blow or batten insulation
Pros
  • Light and easy to cut with scissors or a utility knife
  • Staples on fast; no protective gear needed like fiberglass
  • Double-bubble core adds a little bulk and a vapor barrier in one layer
  • Class A/Class 1 fire rating
  • Handles humidity well and resists mold and mildew
Cons
  • R-value depends on air space; stapled flat against a surface it is close to R-3.7
  • Only about 33 sq. ft. per roll, so a full attic takes many rolls
  • Not a substitute for fiberglass or foam in cold climates
  • Foil surface can tear and shows wrinkles
  • Edges need taping to keep the vapor barrier continuous

Reflectix Reflective Radiant Barrier Insulation Roll prices at every store

  • ZoroNew

    In stock

    $26.99Observed at 3:54 PM
    Visit store
  • Lowe'sNew

    Availability unknown

    $22.48Observed at 3:04 PM
    Visit store

Also available at

  • WalmartCheck price at Walmart
  • WalmartCheck price at Walmart
  • Tractor Supply CompanyCheck price at Tractor Supply Company
  • Max WarehouseCheck price at Max Warehouse
  • eBayCheck price at eBay
  • InstacartCheck price at Instacart
  • Ace HardwareCheck price at Ace Hardware
  • DoorDashCheck price at DoorDash
  • Moscow & Pullman Building SupplyCheck price at Moscow & Pullman Building Supply
  • S.W. CollinsCheck price at S.W. Collins
  • Do it BestCheck price at Do it Best
  • Discount Builders Supply & HardwareCheck price at Discount Builders Supply & Hardware
  • Carr HardwareCheck price at Carr Hardware
  • Hardware WorldCheck price at Hardware World
  • True ValueCheck price at True Value
  • DK HardwareCheck price at DK Hardware

Reflectix Reflective Radiant Barrier Insulation Roll price history

Lowest price we've seen: $16.39 on Nov 4 at Hardware World. Tracked across 17 stores since Nov 4.

What reviewers say

Buyers rate it 4.8 out of 5 across 307 ratings and mostly use it for attics, garages and outbuildings. Complaints center on coverage per roll and on the modest real-world R-value when it is installed tight against a surface.

Pros
  • Easy to cut and staple
  • Cuts attic heat noticeably when installed with an air gap
  • Holds up in damp crawl spaces
  • Clean to work with compared with fiberglass
Cons
  • Rolls run out fast for the square footage
  • Thin and easy to tear at staples
  • R-value claims depend on installation
  • Foil wrinkles and does not lie flat

About the Reflectix Reflective Radiant Barrier Insulation Roll

Reflectix 16 in. W x 25 L R-3.7 to R 21 Reflective Radiant Barrier Insulation Roll 33 sq. ft.

Specifications

R-Value
R 3.7 to R 21
Thermal Resistance
Resists transfer of heat
Form
Rolls
Fire Rating Class
Class A/Class 1
Product Type
Reflective Insulation
Insulation Type
Thermal
Insulated Plasterboard
No
Reflective Type

Questions and answers

Is Reflectix worth it compared with fiberglass?
For radiant heat in attics and metal buildings, yes, especially at $22.48 at Lowe's as of November 4, 2026. For filling a wall cavity in a cold climate, fiberglass or foam gives more R-value per inch and costs less per square foot.
What R-value does it actually deliver?
Reflectix rates this roll from R-3.7 to R-21 depending on air space. You get the high end only with a gap on both sides, such as across rafters; stapled flat to a wall or floor it performs near the low end.
How much area does one roll cover?
About 33 sq. ft. at 16 in. wide by 25 ft. long. Measure your joist or rafter runs and divide; most attics need several rolls.
Can it go directly against the roof deck or siding?
No. The foil needs an air space to reflect radiant heat, and trapping it against a surface can also create a moisture problem. Leave a gap and tape the seams.
Is it fire rated?
Yes, Class A/Class 1. Check local code before using it over foam or in a garage ceiling, since some assemblies require specific materials.
When is the price lowest?
Insulation tends to dip in fall and winter promotions. The current $22.48 at Lowe's as of November 4, 2026 is already near the bottom of its recent range, so waiting rarely saves much.
Where is the Reflectix Reflective Radiant Barrier Insulation Roll cheapest?
At Lowe's, for $22.48, as of our latest check.
What do buyers say about the Reflectix Reflective Radiant Barrier Insulation Roll?
Rated 4.8 out of 5 from 307 ratings.
Where can I buy the Reflectix Reflective Radiant Barrier Insulation Roll?
17 stores we checked sell it, including Zoro, Lowe's, Walmart, Tractor Supply Company, Max Warehouse.

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All Reflectix deals and products →
Double bubble
Thermal Type
Radiation
Coverage Area
100 sq. ft.
R-Value Per Inch
3
Thickness
5/16 in.
Length
25 ft.
Roll Size
48 in x 25 ft.
Width
16 in
Material Type
Reflective Foil
Facing
Film
Vapor Retarder
Yes
Application
Attics, Crawl Spaces, Walls
Recommended Usage
Livestock and/or produce
Suitable Surfaces
Attic, Crawl space, Floor systems, Wall
Installation Method
Stapling
Moisture Resistance
Inhibits or eliminates condensation
Mold Resistance
Resistant to mold, mildew, and fungi