Shop
  • Deals
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.
TermsPrivacy
BrowseBrowse deal.ai
Deal.ai › Johns Manville › Glass Wool Insulation
Johns Manville
Johns Manville R19 Unfaced Fiberglass Insulation Batt

Johns Manville R19 Unfaced Fiberglass Insulation Batt

4.3(22 ratings)

Best price now

$68.98at Lowe'sObserved at 1:44 PM

Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

Visit Lowe's

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Our take on the Johns Manville R19 Unfaced Fiberglass Insulation Batt

This is a compression-packed batt of unfaced R19 fiberglass insulation, 6.5 inches thick and sized 15 inches wide by 93 inches long, covering about 87 square feet per pack. It is formaldehyde-free, will not mildew, and is meant for 2x6 wood-framed walls, basements, ceilings and floors where no vapor retarder is built in. At $68.98 at Lowe's as of November 7, 2026, it is the only new price we have on record, so there is no recent range to compare it against.

Best forFinishing 2x6 exterior wallsBasement and ceiling runsDIY batt installationSound control between rooms
Pros
  • R19 in a 6.5-inch batt fits standard 2x6 framing
  • Formaldehyde-free binder
  • Unfaced, so you choose your own vapor retarder
  • Compression packaging makes it easier to carry and store
  • Covers about 87 square feet per pack
Cons
  • Unfaced batts need a separate vapor retarder in most wall assemblies
  • Fiberglass requires gloves, long sleeves and a mask to install
  • Compression-packed batts need time to fluff back to full thickness
  • 15-inch width suits standard stud spacing but leaves little room for error

Johns Manville R19 Unfaced Fiberglass Insulation Batt prices at every store

  • Lowe'sNew

    In stock

    $68.98Free shippingObserved at 1:44 PM
    Visit Lowe's

Also available at

  • Fleet FarmCheck price at Fleet Farm
  • ArborCheck price at Arbor
  • Supply OntimeCheck price at Supply Ontime

Store links may earn us a commission. Price via Klarna.

Johns Manville R19 Unfaced Fiberglass Insulation Batt price history

Lowest price we've seen: $39.98 on Nov 7 at Fleet Farm. Tracked across 4 stores since Nov 7.

What reviewers say

  • 4.3 / 522 ratings

Rated 4.3 out of 5 from 22 ratings, buyers mostly report the batts fluff back to full thickness and cut cleanly. Complaints center on the itch and dust of handling fiberglass and on packs arriving compressed tighter than expected.

What people mention
  • ThicknessPraisedBuyers say the batts spring back to the full 6.5 inches once unpacked.
  • ItchCriticisedHandling complaints focus on skin itch and airborne fibers, so gloves and a mask are a must.
  • CuttingPraisedOwners find the batts easy to trim to length and width with a knife.
  • CompressionMixedSome packs arrive packed tighter than expected and take a while to fluff out.
  • FacingMixedUnfaced batts suit buyers who add their own vapor retarder, but others expected a faced product.

Specifications

Form
Batt, Batts
Product Type
Fiberglass Batts
Insulation Type
Thermal, Acoustic
Insulated Plasterboard
No
R-Value
R19
Thermal Resistance
R19
Sound Absorption
Reduces sound transmission

Questions and answers

What R-value and thickness does this batt have?
It is R19 at 6.5 inches thick, about 2.9 R per inch. That fits a standard 2x6 stud cavity.
How much area does one pack cover?
About 87.18 square feet, from 15-inch by 93-inch batts. Measure your wall area and round up for cuts.
Do I need a vapor barrier with unfaced batts?
Yes, in most exterior wall and basement assemblies. This product has no facing or vapor retarder, so add a separate one on the warm side.
Is it safe for people with sensitivities?
The binder is formaldehyde-free, which helps, but the glass fibers still irritate skin and lungs. Wear gloves, long sleeves, eye protection and a mask.
Can it be used for soundproofing?
Yes. It is rated for acoustic use and reduces sound transmission when the cavity is filled and sealed properly.
Is $68.98 a good price?
It is the only new price we have recorded, at Lowe's as of November 7, 2026. Compare it against the per-square-foot cost of other R19 batts before buying.
Where is the Johns Manville R19 Unfaced Fiberglass Insulation Batt cheapest?
At Lowe's, for $68.98, as of our latest check.
What do buyers say about the Johns Manville R19 Unfaced Fiberglass Insulation Batt?
Rated 4.3 out of 5 from 22 ratings.
Where can I buy the Johns Manville R19 Unfaced Fiberglass Insulation Batt?
4 stores we checked sell it, including Lowe's, Fleet Farm, Arbor, Supply Ontime.

Stores we've priced the Johns Manville R19 Unfaced Fiberglass Insulation Batt at

  • Arbor deals and prices
  • Fleet Farm deals and prices
  • Lowe's deals and prices

More from Johns Manville

  • J
    Johns Manville R-13 Kraft Faced Fiberglass Insulation Roll
    Johns Manville R-13 Kraft Faced Fiberglass Insulation Roll
  • J
    Johns Manville R-13
    Johns Manville R-13
  • J
    Johns Manville R-13 Wall Kraft faced Fiberglass Roll Insulation 40-sq ft (15-in W x 32-ft L) Individual pack
    Johns Manville R-13 Wall Kraft faced Fiberglass Roll Insulation 40-sq ft (15-in W x 32-ft L) Individual pack
  • J
    Johns Manville R-19 Unfaced Fiberglass Insulation Batt
    Johns Manville R-19 Unfaced Fiberglass Insulation Batt
  • J
    Johns Manville R-19 Kraft Faced Fiberglass Insulation Roll, 15 in x 39 ft 2 in
    Johns Manville R-19 Kraft Faced Fiberglass Insulation Roll, 15 in x 39 ft 2 in
All Johns Manville deals and products →
Coverage Area
87.18-sq ft
R-Value Per Inch
2.9231
Thickness
6.5 in
Batt Size
15-in W x 93-in L
Length
93 in.
Width
15 in.
Moisture Resistance
Will not mildew
Mold Resistance
Will not mildew
Material Type
Fiberglass
Facing
Unfaced
Material Composition
Formaldehyde-free
Vapor Retarder
No
Application
Sound control
Recommended Usage
Residential
Suitable Surfaces
Walls, 2x6 wood-framed walls, Basements, Ceilings, Floors
Installation Method
Batt Installation
Compressibility
Compression-packaged