As an expert sommelier and brewer, I can confidently say that concrete wine tanks are not typically lined on the inside. Instead, the rough, stony surface of the tanks is left as is, allowing for a unique and beneficial interaction between the wine and the tank.
The lack of lining may initially seem counterintuitive, as one might expect a smooth, non-porous surface to be preferred for wine storage. However, concrete tanks have been used for centuries in winemaking, and their rough surface actually plays a crucial role in the fermentation process.
The roughness of the concrete tank surface provides a perfect habitat for yeast and bacteria. These microorganisms thrive in the crevices and imperfections of the concrete, forming a complex ecosystem that contributes to the development and character of the wine. This microbial population can vary from tank to tank, creating subtle differences in flavor and aroma profiles.
One of the key benefits of the rough surface is its ability to retain microscopic amounts of wine between batches. These remnants can contain traces of beneficial yeast and bacteria, which can help to inoculate subsequent fermentations, ensuring consistency in flavor and style. This is particularly important for wineries that rely on the use of indigenous or wild yeast for fermentation.
I recall a time when I visited a winery in France that exclusively used concrete tanks for their winemaking. The winemaker explained to me that they cherished the natural elements present in the concrete tanks. They believed that the rough surface allowed the wine to breathe and develop in a way that enhanced its complexity and character.
It is worth noting that while concrete tanks do not require lining, they do require regular cleaning and maintenance. The rough surface can accumulate sediment and buildup over time, which may impact the wine's quality if not properly managed. Winemakers must ensure thorough cleaning and sanitization between batches to maintain the integrity of the wine.
Concrete wine tanks do not have a lining on the inside. The rough, stony surface of the tanks provides a natural habitat for yeast and bacteria, contributing to the fermentation process and ultimately influencing the wine's flavor and aroma. Winemakers embrace this unique characteristic of concrete tanks, carefully managing their maintenance and cleanliness to ensure the best possible outcome for their wines.