What is Lime-ROK?

Lime-ROK is an engineered limestone facade system designed to bring together the architectural presence of natural smooth-cut limestone with the practicality of a modern lightweight cladding system.

The result is a facade that feels substantial, refined, and dimensional — without the weight, structural demands, and installation complexity that often come with traditional heavy cladding.

Lime-ROK vs. Natural Stone

Aesthetic

Lime-ROK captures the same refined depth, texture, and mineral character of natural limestone— but without the limitations of quarried stone.

Weight

At about 3 lb/ft², Lime-ROK is significantly lighter than natural stone (which generally weight between 40-50 pounds per sf) reducing structural demands and making handling and installation easier.

Installation

Lightweight, precision-cut panels install faster and more efficiently than traditional stone, without specialized equipment and handling or structural support.

Performance

Lime-ROK combines a durable mineral finish with continuous insulation, adding thermal performance that natural stone alone cannot provide.

How It's Made

Coat

We apply a ⅜” high-impact, GFRC lamina to a 1” expanded polystyrene insulation board. Our cement coating contains a nano penetrating sealer to repel dirt and moisture.

Grind

We run the panel through a proprietary finishing process to give it the same authentic appearance of natural honed limestone.

Trim

We CNC trim all four sizes of the panel to ensure accurate sizing. This allows for more precise grout joints to be achieved, resulting in a high-quality result.

How It's Installed

For existing construction, Lime-ROK can be installed directly over existing masonry (provided the substrate is in good condition). For new construction (or where the substrate is not in good condition), Lime-ROK is installed over a EIFS wall assembly, replacing the finish coat. In both cases, Lime-ROK is adhered to the wall using an exterior grade polymerized adhesive. No mechanical fastening or structural support is required.

Lime-ROK is installed in a similar manner to limestone cladding: (1) cut to size; (2) install in a desired pattern; (3) grout the joints. As is the case with limestone or precast panels, pattern layout and joint location are important aesthetic elements that need to be carefully considered.