What is CurtainRock 40 used for?

It is a rigid stone wool board for commercial curtain wall and exterior wall systems. It provides thermal insulation and sound absorption behind the cladding.

What R-value does the 3 inch board give?

At R-4.3 per inch, a 3 inch board is about R-13. The rating is stated at 75°F.

The stone wool is noncombustible, with a melting point around 2150°F. Check the assembly's fire rating with the system manufacturer, since the foil facings and framing affect it.

Boards are mechanically fastened into the curtain wall assembly. Foil facings should be kept intact and joints fitted tightly.

How much does a pack cover?

Each pack covers 40 sq ft in 24" x 48" boards. Order by the square footage of the wall area plus a cutting allowance.

Can I use it in a house?

It is specified for commercial curtain wall installations. For residential walls, a residential stone wool batt is usually the better fit.

Rockwool Foil Faced CurtainRock 40 24" x 48" 3 in

Last price we saw

$133.64at Arbor, last seen Nov 7

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Our take on the Rockwool Foil Faced CurtainRock 40 24" x 48" 3 in

ROCKWOOL CurtainRock 40 is a rigid stone wool board faced on both sides with reinforced foil, made for commercial curtain wall and exterior wall assemblies. It combines thermal insulation (R-4.3 per inch) with sound absorption and a melting point around 2150°F. The 24" x 48" boards come 3 inches thick, 40 sq ft per pack, and install by mechanical fastening. It is a commercial-grade product, not a DIY retrofit board, and no current price or price history was provided for this page.

Best forCommercial curtain wall and exterior wall assembliesBuildings needing thermal and acoustic control in one boardProjects specifying noncombustible stone wool insulationContractors who want a foil-faced board that installs with mechanical fasteners

Pros

R-4.3 per inch gives solid thermal performance for a 3 in board
Stone wool absorbs sound as well as heat
Foil facings add a vapor-retarding, reflective surface
Noncombustible stone wool with a melting point near 2150°F
Passed fungi resistance testing

Rockwool Foil Faced CurtainRock 40 24" x 48" 3 in prices at every store

ArborCheck price at Arbor

Rockwool Foil Faced CurtainRock 40 24" x 48" 3 in price history

Lowest price we've seen: $133.64 on Nov 7 at Arbor. Tracked across 1 store since Nov 7.

Specifications

Form: Board
Product Type: Rigid Foam Board
Insulation Type: Thermal, Acoustic
Insulated Plasterboard: No
Material Type: Stone wool
Facing: Reinforced foil facings
Material Composition

Questions and answers

What is CurtainRock 40 used for?: It is a rigid stone wool board for commercial curtain wall and exterior wall systems. It provides thermal insulation and sound absorption behind the cladding.
What R-value does the 3 inch board give?: At R-4.3 per inch, a 3 inch board is about R-13. The rating is stated at 75°F.
Is it fire rated?: The stone wool is noncombustible, with a melting point around 2150°F. Check the assembly's fire rating with the system manufacturer, since the foil facings and framing affect it.
How is it installed?: Boards are mechanically fastened into the curtain wall assembly. Foil facings should be kept intact and joints fitted tightly.
How much does a pack cover?: Each pack covers 40 sq ft in 24" x 48" boards. Order by the square footage of the wall area plus a cutting allowance.
Can I use it in a house?: It is specified for commercial curtain wall installations. For residential walls, a residential stone wool batt is usually the better fit.