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Deal.ai › Reflectix › Fiberglass Insulation
Reflectix
Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25)

Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25)

4.7(3 ratings)

Best price now

$32.88at WalmartChecked Nov 9

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Price facts

  • Last seen at $32.88 at Walmart on Nov 9.

Our take on the Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25)

Reflectix R21 is a radiant barrier made of two layers of air bubbles bonded between metalized aluminum film. It reflects about 97% of radiant heat and is fire rated Class 1/Class A per ASTM E84. It is fiber-free, so it installs without the itch and protective gear fiberglass needs, and it resists moisture, mold and pests. It works best as a radiant barrier in attics, walls and crawl spaces, not as a substitute for bulk insulation that slows conductive heat loss.

Best forAttic radiant barrier over existing insulationGarage doors and knee wallsCrawl spaces and rim joistsDIYers avoiding fiberglass itch
Pros
  • Reflects about 97% of radiant heat
  • Fiber-free and safe to handle without a respirator
  • Staples, nails or glues into place and cuts with scissors
  • Resists moisture, mold and pests
  • Lightweight and does not compress or disintegrate
Cons
  • Bubble foil has a low R-value on its own, so it needs an air space to work
  • Thin material offers little sound blocking
  • Foil surface can be crinkly and awkward to keep flat
  • Not a replacement for fiberglass or foam in cold climates

Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25) prices at every store

  • WalmartNew

    In stockSold by JTO Upstart NoveltiesReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $32.88Free shippingChecked Nov 9
    Visit Walmart

What reviewers say

Owners use it mostly for attic rafters, garage doors and crawl spaces and like the clean, itch-free install. Many note it helps with radiant heat but does not replace bulk insulation.

What people mention
  • InstallationPraisedOwners say it cuts and staples quickly with no protective gear.
  • Radiant performanceMixedBuyers report less attic heat but say it is not a substitute for bulk insulation.
  • DurabilityMixedThe bubble core holds up, but the foil facing can tear at cut edges.
  • MoisturePraisedUsers like that it does not soak up water or grow mold.

About the Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25)

This is a reflective bubble roll insulation for attic walls. It is built from two layers of polyethylene air bubbles bonded between two layers of highly reflective metalized aluminum polyester film. The material is lightweight and durable, and it holds staples without tearing. It does not compress, collapse or disintegrate.

The insulation reflects 97% of radiant heat and emits less than 3%. It is a Class 1 / Class A fire rated radiant barrier that has passed the ASTM E84 and ASTM E2599 tests. It is not affected by moisture or humidity, inhibits condensation, and does not promote the growth of fungi, mold or mildew. It also does not promote nesting of insects or rodents.

It is non-toxic, non-carcinogenic and fiber-free, so installing it does not require protective clothing or respirators. It cuts with a utility knife or scissors and can be stapled, nailed or glued into place. It is maintenance free. By reducing stress on heating and cooling systems, it helps keep a home warmer in winter and cooler in summer.

Color
Silver
Roll size
16 in x 25 ft
Coverage
33.3 sq ft
Construction
Two layers of polyethylene air bubbles between two layers of metalized aluminum polyester film
Radiant heat
Reflects 97%, emits less than 3%
Fire rating
Class 1 / Class A; passed ASTM E84 and ASTM E2599
Installation
Staple, nail or glue; cuts with utility knife or scissors
Safety
Non-toxic, non-carcinogenic, fiber-free
Moisture
Not affected by moisture or humidity; inhibits condensation
Origin
Made in USA

Specifications

color
SilverSource
size
33.3-sq ft (16x25)Source

Questions and answers

Does Reflectix R21 replace fiberglass insulation?
No. It is a radiant barrier with a low R-value on its own. Use it over or alongside bulk insulation, with an air space facing the hot side.
Where should I install it?
Common spots are attic rafters, knee walls, garage doors, rim joists and crawl spaces. Leave an air gap between the foil and the surface for best reflection.
How do I cut and fasten it?
Cut it with a utility knife or scissors. Staple, nail or glue it in place; the material holds staples without tearing.
Is it safe to handle?
Yes. It is fiber-free and non-toxic, so no respirator or protective clothing is needed.
Will it cause mold or pests?
The material resists moisture and does not promote mold, mildew or nesting by insects or rodents.
What is the roll size?
The roll is 16 inches wide by 25 feet long, covering about 33.3 square feet.
Where is the Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25) cheapest?
At Walmart, for $32.88, as of our latest check.
What do buyers say about the Reflectix R21 Attic Wall Reflective Bubble Roll Insulation 33.3-sq ft (16x25)?
Rated 4.7 out of 5 from 3 ratings.

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