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Concrete wine tanks growing in popularity

  • Carlos Lozano wipes off an egg-shaped concrete wine fermentation tank before it is shipped out to the client from Sonoma Cast Stone in Petaluma on Tuesday, December 4, 2012. (John Burgess/The Press Democrat)

For centuries, European vintners used monstrous concrete tanks to ferment and store their wines, a technique used in California's oldest wineries before Prohibition.

But when the state's wine industry blossomed in the 1970s and 1980s, many wineries turned to stainless steel.

Now, concrete is making a comeback. North Coast wineries are trying an old technique in a new way, installing small, portly concrete tanks that look like creatures from another world.

In Sonoma County, it all started when Don Van Staaveren, winemaker at Three Sticks Wines, pitched the idea of making concrete wine tanks to his neighbor, Steve Rosenblatt, the president of Sonoma Cast Stone. Rosenblatt was already making unusual countertops, sinks and walls, and with a small vineyard of his own, he had an interest in winemaking.

"In the early history of winemaking, concrete tanks were very prevalent, and there were some really outstanding wines made in concrete tanks," Van Staaveren said. "So I thought, well, there's no reason why we can't do it again."

After a few years of developing a prototype together, Rosenblatt sold his first concrete egg in 2011, and he has been challenged to keep up with the pace of orders ever since. He sold about a dozen tanks in 2011, and 26 tanks this year. For 2013, he has already received orders for at least 54 tanks.

"We've got a window of opportunity, and it will last maybe 10 years," Rosenblatt said. "We're investing in it, because we see the market going this way, and we want to become the name in concrete wine tanks."

Five years ago, before Rosenblatt entered the scene, the go-to source for concrete-curious winemakers was Nomblot, a French company that has manufactured concrete wine tanks since 1922. International shipping for bulky tanks can cost thousands of dollars, so Rosenblatt saw an opportunity to fill a local need.

Winemakers in Europe have fermented their wines in concrete tanks for thousands of years. Some of the cement structures installed by early California wineries are as large as a building, spanning 20 feet by 20 feet.

But in the 1970s and &‘80s, when the California wine industry was blossoming into a powerhouse, wineries began turning to stainless steel fermentation tanks, which were easier to clean. Around Sonoma Valley, some of those blocky former concrete tanks have been transformed into shops or winery rooms, with rough-hewn doors cut into the boxy shapes.


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