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Deal.ai › ROCKWOOL
ROCKWOOL
RockWool R14 Comfortbatt Insulation

RockWool R14 Comfortbatt Insulation

Best price now

$71.49at Woodson LumberChecked 1 h ago

16% under what the other stores charge

Compared across 3 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $71.49 at Woodson Lumber (checked Nov 15, 2026).
  • Checked at 3 stores.

Our take on the RockWool R14 Comfortbatt Insulation

ROCKWOOL R14 Comfortbatt is a semi-rigid stone wool batt for wood and steel framing in walls, floors, ceilings and attics. Its flexible edge compresses to fit the cavity and springs back to fill it, holding the R14 rating. Stone wool resists moisture, fire and mold and absorbs sound better than fiberglass batts, but it is denser and heavier to handle and costs more than basic fiberglass. It suits DIYers and contractors who want a durable, sound-dampening batt that holds up in damp spots.

Best forWood- and steel-framed walls and floorsAttics and ceilingsSound control between roomsDamp-prone areas like basements
Pros
  • Flexible edge fills framing gaps for full R-value
  • Stone wool resists moisture, fire and mold
  • Absorbs sound better than fiberglass
  • Semi-rigid batts cut cleanly and hold shape
  • Works in both wood and steel framing
Cons
  • Denser and heavier than fiberglass batts
  • Itchier and dustier to handle; gloves and a mask help
  • Costs more than comparable fiberglass
  • R14 suits 2x4 walls, not deep 2x6 cavities

RockWool R14 Comfortbatt Insulation prices at every store

  • McCoy's Building SupplyNew

    In stock

    $84.99Checked 1 h ago
    Visit McCoy's Building Supply
  • Ace HardwareNew

    In stock

    $84.99+ $240.00 shippingChecked 1 h ago
    Visit Ace Hardware
  • Woodson LumberNew

    Availability unknown

    $71.49Checked 1 h ago
    Visit Woodson Lumber

RockWool R14 Comfortbatt Insulation price history

Lowest price we've seen: $71.49 on Nov 15 at Woodson Lumber. Tracked across 3 stores since Nov 15.

What reviewers say

Owners and installers rate Comfortbatt highly for fit, sound deadening and moisture resistance. The main complaints are weight, dust and price against fiberglass.

What people mention
  • FitPraisedThe flexible edge compresses and expands to fill framing gaps, so batts stay put.
  • SoundPraisedOwners say rooms are noticeably quieter after installing it in interior walls.
  • MoisturePraisedStone wool handles damp basements better than fiberglass, which can sag when wet.
  • WeightCriticisedInstallers find the batts heavier and harder to handle overhead than fiberglass.
  • Dust and itchCriticisedCutting and handling creates dust and itch, so gloves, glasses and a mask are advised.
  • CostMixedBuyers accept the higher cost for the moisture and sound benefits, but some find it hard to justify over fiberglass.

About the RockWool R14 Comfortbatt Insulation

ROCKWOOL Comfortbatt is a semi-rigid stone wool insulation batt rated R14. It is made for steel and wood framing and provides thermal resistance in both.

The batt has a flexible edge that compresses during installation and then expands to fill the space fully, so it maintains the needed R-value. It can be installed in walls, attics, ceilings, and floor frames. The batt is easy to cut.

Type
Semi-rigid stone wool batt
R-value
R14
Framing
Steel and wood
Installation areas
Walls, attics, ceilings, floor frames
Sound
Absorbs sound
Resistance
Water, moisture, and fire

Questions and answers

Is R14 enough for a 2x4 wall?
Yes. R14 is a common choice for 2x4 exterior walls, where deeper batts will not fit. Check your local code for the R-value your climate zone requires.
How does it compare with fiberglass batts?
Stone wool is denser, resists moisture and fire, and deadens sound better. Fiberglass is lighter and cheaper but can sag when wet and does less for noise.
Can I cut it to fit?
Yes. A serrated blade or insulation knife cuts it cleanly. Compress the batt slightly and cut a little wide so it fills the cavity.
Does it need a vapor barrier?
The batt itself is not a vapor barrier. In most walls you still need a separate vapor retarder on the warm side, per local code.
Is it safe to handle?
Stone wool fibers are not classified as carcinogenic, but wear gloves, long sleeves, eye protection and a dust mask. It can itch and create dust when cut.
Where can it be installed?
Walls, floors, ceilings and attics in wood or steel framing. Keep it dry and do not compress it into a smaller cavity than its rated thickness.
Where is the RockWool R14 Comfortbatt Insulation cheapest?
At Woodson Lumber, for $71.49, 16% under what the other stores charge, as of our latest check.
Where can I buy the RockWool R14 Comfortbatt Insulation?
3 stores we checked sell it, including Woodson Lumber, Ace Hardware, McCoy's Building Supply.

Stores we've priced the RockWool R14 Comfortbatt Insulation at

  • Ace Hardware deals and prices

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