River rock in the club aisle room was placed on the floor before the concrete was poured around it. After curing, the floor was polished, sealed, and waxed.
Superstone / Ravenna Design by Doug Castanedo River rock in the club aisle room was placed on the floor before the concrete was poured around it. After curing, the floor was polished, sealed, and waxed.

The Lofts in downtown Miami combines modern lines with luxury, integrating concrete, wood, and steel throughout the building. In Phase 1 of this three-phase project, George Lacker, GLC3 Concrete, Fort Lauderdale, Fla., was commissioned to do decorative concrete work in this southern Florida residential condo building.

The project included a number of concrete elements throughout the building from the lobby area into each condo unit. The architectural elements included ½-inch-thick wall panels, chemically stained floors in a geometric design, and cast-in-place countertops.

Zinc strips were used to create the geometric design on the floor. Four chemical stain colors were used to create a rich, warm tone throughout the project
Superstone / Ravenna Design by Doug Castanedo Zinc strips were used to create the geometric design on the floor. Four chemical stain colors were used to create a rich, warm tone throughout the project

In the lobby entryway, 28-foot ceilings allowed for a dramatic concrete paneled wall. Using a mix of poly-modified cement and fibers, the panels were precast ½ inch thick at an offsite warehouse and then shipped to the jobsite. Each panel is 4 foot 2 inches wide and 5 foot 5 inches tall that together cover 594 square feet. The uniquely blended mix enabled the panels to be cast very thinly, yet still meeting the required strength. A forklift was needed to hoist each panel into place, which were then attached to the wall using concrete screw anchors. "We had to come up with the look of a concrete wall, so we came up with ½-inch casted panels," says Lacker. The wall panels were given a form-grade plywood finish and then polished.

Countertops were formed in place using a standard mix, then polished and finished.
Countertops were formed in place using a standard mix, then polished and finished.

Chemically stained floors were carried through the lobby and into each individual condo unit. "We used zinc metal strips for the design and placed integral color concrete in sections," notes Lacker. "We used zinc strips and then poured the concrete into the chosen design." Zinc strips 1/8 inch thick were placed on the floor to create a modern geometric design that would serve as color dividers. Integrally colored concrete in natural concrete, heather and light grays, and a rich warm orange were poured in each section.Epoxy bonding resin was applied the entire floor, followed by a polymer-modified cementitious topping that was hand-troweled to achieve a smooth finish. Sealer and polymer floor finish added a wax sheen that also protects the floor.

In the club aisle room, large river rocks were used to bring some natural elements into the project. The rocks were cut in half and set onto the floor. Concrete was poured around the rocks until flush with the tops of the rocks. The entire surface then was polished, sealed, and waxed.

In addition to the wall elements and decorative floors, a number of countertops were included in the project as support walls and architectural elements. Using a standard concrete mix, the counter-tops were formed and placed. After curing, they were polished and finished, accentuating the natural concrete gray color.