ROCKWOOL Comfortboard 80 R-8.4 Rigid Stone Wool Insulation Board 2 in. x 24 in. x 48 in. (40 sq. ft., 5 boards). Genuine ROCKWOOL product, model RXCB224. In stock at Partner Supply, Brooklyn, NY, with fast delivery across NY, NJ and CT.
Overview
The 2 in. Comfortboard 80 is a rigid stone wool board rated R-8.4, sold 5 boards to a bundle (40 sq. ft.). It goes on the exterior of a framed wall as continuous insulation, behind stucco and other claddings, or on basement and foundation walls and under slabs.
Like the rest of the Comfortboard 80 line it is non-combustible, vapor permeable, water repellent and resistant to rot and mold. The 8 lb/ft3 density gives it enough compressive strength (439 psf at 10%) to support furring and cladding fasteners. Cuts with a bread knife.
Key features
- Rigid stone wool board for exterior continuous insulation (non-structural sheathing), basement and foundation walls, and under slabs (manufacturer).
- R-4.2 per inch at 75 F (ASTM C518/C177); actual density 8 lb/ft3.
- Non-combustible; Flame Spread 0 / Smoke Developed 0 (ASTM E84 / UL 723); melting point approx. 2150 F (1177 C).
- Vapor permeable (31 perm, ASTM E96) so wall assemblies can dry outward; 0.05% moisture sorption (ASTM C1104).
- Compressive strength 439 psf at 10% compression (ASTM C165).
- Reduces thermal bridging through framing; NRC 0.9 sound absorption (ASTM C423).
- Listed by the California State Fire Marshal BML; made from natural and recycled materials; CFC/HCFC free.
Specifications
| Brand | ROCKWOOL |
|---|---|
| Model / MPN | RXCB224 |
| ROCKWOOL item # | 169067 |
| Product type | Mineral Wool Insulation |
| R-value | R-8.4 |
| Size | 2 in. x 24 in. x 48 in. |
| Thickness | 2 in. |
| Facing | Unfaced |
| Coverage | 40 sq. ft. per bundle |
| Pieces per package | 5 |
| Fits | Exterior continuous insulation over wood or steel framing; basement walls; under slabs |
| Condition | New |
Quick answers
How much does one bundle cover?
One bundle covers 40 sq. ft. (5 pieces, 2 in. x 24 in. x 48 in.).
What framing does it fit?
Exterior continuous insulation over wood or steel framing; basement walls; under slabs
Is it in stock and how fast can I get it?
Usually in stock at our Brooklyn yard. Order online or on WhatsApp at 718-406-4455 for pickup by appointment at 21 Ingraham Street, Brooklyn, NY 11206, or fast delivery in NY, NJ and CT.
Stocked in our warehouse: free pickup, or local delivery to your site for a flat $75 per order. Outside our local area, choose Shipping: we quote the carrier rate after you order and hold the order until you approve it.
Unused items in original packaging can be returned within 30 days.