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Deal.ai › ROCKWOOL
ROCKWOOL
Rockwool Unfaced CurtainRock 80 - All Sizes

Rockwool Unfaced CurtainRock 80 - All Sizes

Best price now

$149.55at Insulation4USChecked 52 min ago

Compared across 4 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $149.55 at Insulation4US (checked Nov 14, 2026).
  • Checked at 4 stores.

Our take on the Rockwool Unfaced CurtainRock 80 - All Sizes

CurtainRock 80 is a semi-rigid stone wool board made for curtain wall systems, used behind the cladding as fire containment and thermal and acoustic insulation. It is non-combustible, with a melting point around 2150°F, and it drains water rather than soaking it up. It suits contractors and builders working to tested perimeter fire systems, where it pairs with ROCKWOOL Safe firestop products. Against foam and fiberglass boards, it wins on fire performance and moisture resistance but weighs more and needs mechanical fastening or backpan support.

Best forCurtain wall and facadesPerimeter fire containmentAcoustic and thermal backup behind claddingCommercial construction projects
Pros
  • Non-combustible stone wool with a melting point near 2150°F
  • Low moisture sorption; drains water away from exterior walls
  • Higher R-values than many competing board insulations
  • Sound absorbent
  • Chemically inert and non-corrosive
  • Does not rot or support mildew, fungi or bacteria
Cons
  • Semi-rigid board needs backpan or mechanical fastening
  • Stone wool is denser and heavier to handle than foam board
  • Sold in packs sized by thickness, so ordering takes planning
  • Fire ratings depend on the full tested assembly, not the board alone

Rockwool Unfaced CurtainRock 80 - All Sizes prices at every store

  • Insulation4USNew

    In stockReturn policy

    $149.55Checked 52 min ago
    Visit Insulation4US
  • Roofing4USNew

    In stockReturn policy

    $149.55Checked 52 min ago
    Visit Roofing4US
  • ManuNew

    In stockReturn policy

    $149.55Checked 52 min ago
    Visit Manu
  • MyHackerTechNew

    In stockReturn policy

    $157.00Checked 52 min ago
    Visit MyHackerTech

About the Rockwool Unfaced CurtainRock 80 - All Sizes

Rockwool CurtainRock 80 is a lightweight, semi-rigid stone wool insulation board. It is made to meet a variety of curtain wall specifications and is designed specifically for use in curtain wall systems. It suits backpan or mechanical fastening applications.

The board is non-combustible, with a melting point of approximately 2150°F (1177°C). It repels water, drains water away from exterior walls, and has a low moisture sorption rate. It does not rot or promote the growth of mildew, fungi, or bacteria. It is chemically inert, non-corrosive, and sound absorbent.

Used together with Rockwool Safe, CurtainRock 80 is UL/ULC tested and approved for perimeter fire containment. It is approved for use as a component of UL-approved systems. It can be fabricated and faced with reinforced foil facings, and it can contribute to earning LEED points.

Type
Unfaced, semi-rigid stone wool insulation board
Thickness
2", 3", or 4"
Coverage per pack
2": 56 sq ft; 3": 32 sq ft; 4": 24 sq ft
Fire performance
Non-combustible; melting point approx. 2150°F (1177°C)
Fire containment
UL/ULC tested and approved for perimeter fire containment when used with Rockwool Safe
Applications
Curtain wall systems; backpan or mechanical fastening
Moisture
Low moisture sorption; repels water; drains water away from exterior walls
Resistance
Does not rot; resists mildew, fungi, and bacteria; chemically inert and non-corrosive
Acoustics
Sound absorbent
Facing
Can be faced with reinforced foil facings
Certification
Approved as a component of UL-approved systems; can contribute to LEED points

Questions and answers

What is CurtainRock 80 used for?
It is a semi-rigid stone wool board for curtain wall systems, installed behind the cladding for fire containment, thermal insulation and sound absorption. It works with backpan or mechanical fastening.
Is it fire rated?
The board itself is non-combustible, with a melting point of about 2150°F. UL/ULC-tested perimeter fire containment comes from the full assembly of CurtainRock 80 with ROCKWOOL Safe firestop systems, not the board alone.
Does it absorb water?
It has a low moisture sorption rate and drains water away from exterior walls. It repels water and does not rot or promote mildew, fungi or bacteria.
What thicknesses does it come in?
It is offered in 2, 3 and 4 inch boards. Coverage per pack drops as thickness rises, so plan quantities by the thickness your assembly specifies.
How does it compare with foam or fiberglass board?
Stone wool is non-combustible and handles moisture better than foam, and it is denser and heavier to install. Fiberglass is lighter but generally weaker on fire containment and water resistance.
Can it be used outside the curtain wall?
It is designed specifically for curtain wall systems, so use it where the assembly and fire detail call for it rather than as general-purpose cavity insulation.
Where is the Rockwool Unfaced CurtainRock 80 - All Sizes cheapest?
At Insulation4US, for $149.55, as of our latest check.
Where can I buy the Rockwool Unfaced CurtainRock 80 - All Sizes?
4 stores we checked sell it, including Insulation4US, Roofing4US, MyHackerTech, Manu.

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