Argentinian architect Luciano Kruk is unfaltering in his commitment to rugged and textured concrete. Here are five residences, built among Argentina's woodlands and sandy dunes, in which the concrete connoisseur champions the material.

Casa H3
Board-marked concrete walls wrap around large expanses of glazing to form this two-storey summer house, which Kruk and his studio Luciano Kruk Arquitectos completed in the seaside resort of Mar Azul near Buenos Aires for three sisters.
Pine planks were used to imprint the exterior as a reference to the building's wooden surroundings, while the concrete is left untreated so it will continue to weather and blend in with the surroundings over the years.
"In its minimum scale the house rises by its own will, but also integrates itself respectfully with its surroundings, both natural and human-built," said Mariana Piqué from Luciano Kruk Arquitectos.
Casa MR
Timber slats add warmth to the cast concrete volumes of Casa MR, which is nestled into a vegetated and sandy plot on the Costa Esmeralda.
Kruk split the property into two halves to navigate the slope, using the peak of the sand dune to support one end of the upper storey.
"Seeking to not change in the least the original topography, we decided to split the program into two simple volumes," he said. "The proposal seeks to preserve the most of the wonderful qualities of the place."

Photograph is by Diego Medina
Casa L4
Designed by Kruk for himself and ...