Chestnut metato

A chestnut dryer built into its landscape

A metato is a small building where chestnuts dry above a low fire. The name is associated with the Val Serchio in northern Tuscany, while related chestnut-drying buildings elsewhere in Italy may be called seccatoi or essiccatoi. A fixed masonry structure belongs to the place where it stands: it is not a portable dryer or a household appliance.

Metati were commonly placed among chestnut groves, close to the harvest and the work of drying. Records also note examples near farmhouses or inside settlements, where the harvest could be watched more closely. The EU specification for Farina di Neccio della Garfagnana ties this architecture to the local chestnut economy: small buildings were constructed for drying, and the region still preserves them as part of its rural heritage.

An Italian heritage catalogue places traces of metati in Garfagnana as far back as the seventeenth century. This dates regional evidence, not every building. The same catalogue says the word metato is typical of the Val Serchio dialect and is also used for similar buildings in other regions.

Two chambers and a permeable floor

The usual arrangement described in the regional records is a modest building with a lower fire chamber and an upper drying chamber. At Marola, the municipality describes one room divided into two levels by thin wooden beams. A close layer of wattles, or cannicci, rests on those supports. Chestnuts are spread above the fire rather than placed in a sealed box, allowing warmth and smoke to rise through the drying crop.

The Gallicano heritage record describes a simple square or rectangular masonry structure made with local stones and lime mortar, sometimes mixed with sand. It records timber beams and smaller crosspieces carrying boards and narrow poles laid across them. In that particular example, the side entrance to the combustion chamber has a wooden lintel, while an opening at the back of the drying room admits chestnuts. Those openings are details of a documented building, not a universal template.

Roof forms changed between places and periods. The catalogue describes early roofs of timber boards covered with stone slabs, some roofs of rye straw, and later use of terracotta tiles. The Gallicano building it records has a two-pitched roof with slate on one side and tiles on the other. These alternatives should remain separate examples rather than being combined into a newly invented standard roof.

A construction outline, not a measured plan

The documented construction features support a broad sequence: a small local-stone masonry shell; two vertically arranged chambers; a timber-supported upper drying floor; and a roof selected from the coverings actually recorded for the region. They do not provide foundations, wall thickness, beam sections, spans, fasteners, a mortar formula, a chimney design, or dimensions for the doors and loading opening. The steps on this page summarize known features and cannot be used as a structural drawing or a modern building specification.

The records also emphasize upkeep. The heritage catalogue says the simple buildings required regular maintenance and periodic repairs. That observation matters because the walls, roof, upper timber floor and nearby fire all belong to one structure, but the source gives no load ratings or modern safety clearances. Any new construction or reuse would need site-specific structural and fire-safety design from qualified local professionals.

Slow drying and the work of tending the fire

The fire was kept low and steady, not driven like a cooking flame. In the Gallicano record, chestnut wood is burned at the centre of the lower chamber; larger logs are added after ignition to extend the heat, and husks left from the previous year's crop are placed over the fire. The Marola account likewise describes a fire on the stone floor that burns slowly for about forty days. The catalogue gives roughly forty to forty-five days for its recorded practice and says frequent supervision and experience were necessary.

Those timings are not a universal specification. A 2025 study of two metati in Molazzana reports chestnut-drying runs of forty-four and sixty-three days in 2023. Differences in the building, crop, weather and operator may matter, but the study does not turn those two measurements into a general operating rule. What is consistently documented is the long, gradual drying period and the close attention it demands.

Chestnut flour, local economies and limits of the evidence

Drying made chestnuts easier to store, peel and mill into flour, an important food in mountain communities. The municipal account of Marola traces dried chestnuts to mills along the Tresinaro stream. The Garfagnana PDO specification connects slow metato drying with the flour's characteristic chestnut flavour and slightly bitter aftertaste; it also records the importance of local varieties, stone milling and designated municipalities. The metato is one stage in that chain, not the mill or the finished flour.

The evidence covers particular historic buildings and working practices rather than a modern safe construction recipe. It does not establish exact capacity, dimensions, combustion-air path, fire separation, structural loads or a universal roof and rack arrangement. The account therefore leaves measurements out and distinguishes the Gallicano and Marola examples instead of filling gaps with guessed specifications.