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Deal.ai › Knauf
Knauf
Knauf R-30 Kraft Faced Batt Fiberglass Insulation

Knauf R-30 Kraft Faced Batt Fiberglass Insulation

4.6(266 ratings)

Best price now

$81.20at HiwasseeChecked 41 min ago

19% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $81.20 at Hiwassee (checked Nov 14, 2026).
  • Checked at 5 stores.

Our take on the Knauf R-30 Kraft Faced Batt Fiberglass Insulation

Knauf R-30 Kraft Faced Batt is fiberglass blanket insulation with a kraft paper facing on one side. R-30 suits exterior walls, cathedral ceilings and floors in most climate zones, and the facing gives it a built-in vapor retarder so you don't need a separate sheet. It is GREENGUARD certified for low emissions, which matters for indoor air quality in a finished space. Against unfaced batts it saves a step; against blown-in insulation it is easier to place precisely but slower to fit around wiring and pipes.

Best forExterior wall and cathedral ceiling cavitiesDIY installers who want a built-in vapor retarderGarages and additions in cold climatesOwners upgrading from R-13 or R-19 batts
Pros
  • R-30 rating suits cold-climate walls and ceilings
  • Kraft facing acts as a vapor retarder
  • GREENGUARD certified for low emissions
  • Cuts with a utility knife and friction-fits between studs
  • Standard widths fit common framing
Cons
  • Fiberglass needs gloves, long sleeves and a mask
  • Faced batts must be stapled and sealed at flanges
  • Compressing it into a smaller cavity lowers the R-value
  • Does not seal gaps and corners as well as spray foam

Knauf R-30 Kraft Faced Batt Fiberglass Insulation prices at every store

  • True ValueNew

    In stock

    $99.99Checked 41 min ago
    Visit True Value
  • Stones Ace ofNew

    In stock

    $139.99Checked 41 min ago
    Visit Stones Ace of
  • HiwasseeNew

    Availability unknown

    $81.20Checked 41 min ago
    Visit Hiwassee
  • Woodson LumberNew

    Availability unknown

    $96.50Checked 41 min ago
    Visit Woodson Lumber
  • Do it BestNew

    Availability unknown

    $99.99Checked 41 min ago
    Visit Do it Best

Knauf R-30 Kraft Faced Batt Fiberglass Insulation price history

Lowest price we've seen: $81.20 on Nov 14 at Hiwassee. Tracked across 5 stores since Nov 14.

What reviewers say

  • 4.6 / 5266 ratings

Buyers rate it highly and describe it as easy to cut and fit, with the kraft facing saving them a separate vapor barrier. Complaints center on itchiness during installation and batts arriving compressed or torn.

What people mention
  • InstallationPraisedBuyers say it cuts cleanly and friction-fits between studs without much trimming.
  • FacingPraisedThe kraft facing staples up fast and removes the need for a separate vapor retarder.
  • ItchinessCriticisedOwners warn that handling it without gloves, long sleeves and a mask leaves skin irritated.
  • Condition on arrivalCriticisedSome buyers report batts arriving compressed, torn or with damaged facing.
  • R-valueMixedReviewers note the R-30 performs well when left at full thickness but loses value if squeezed into a shallow cavity.

Specifications

Thermal Type
Blanket
GREENGUARD Certified
Yes
Type
Thermal Type

Questions and answers

What does R-30 mean and where should it go?
R-30 is the thermal resistance rating. It suits exterior walls, cathedral ceilings and floors in most climate zones, and colder areas may want more in the ceiling.
Do I need a separate vapor barrier with the kraft facing?
No. The kraft facing works as the vapor retarder, so it should face the warm, interior side of the wall and the flanges should be stapled and sealed.
Can I compress it into a smaller cavity?
You can, but compressing the batt reduces its effective R-value. Keep the full thickness wherever the cavity allows.
Is it safe for indoor air quality?
It is GREENGUARD certified for low emissions. Wear gloves, long sleeves and a mask while installing, since the fiberglass itself irritates skin and lungs.
How does it compare with blown-in insulation?
Batts are easier to place precisely and need no rental blower, but blown-in fills gaps and around obstructions better. Faced batts also handle the vapor retarder in one step.
What tools do I need to install it?
A utility knife or insulation knife, a straightedge, a staple gun and safety gear. A tape measure helps confirm cavity depth before you cut.
Where is the Knauf R-30 Kraft Faced Batt Fiberglass Insulation cheapest?
At Hiwassee, for $81.20, 19% under what the other stores charge, as of our latest check.
What do buyers say about the Knauf R-30 Kraft Faced Batt Fiberglass Insulation?
Rated 4.6 out of 5 from 266 ratings.
Where can I buy the Knauf R-30 Kraft Faced Batt Fiberglass Insulation?
5 stores we checked sell it, including Hiwassee, Woodson Lumber, True Value, Do it Best, Stones Ace of.

Stores we've priced the Knauf R-30 Kraft Faced Batt Fiberglass Insulation at

  • Ace Hardware deals and prices
  • True Value deals and prices

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