Thatch harvesting on Sylt has a long tradition and is closely linked to the island's characteristic appearance, particularly through its numerous thatched-roof houses. Thatch, also known as reed, prefers to grow on shores and in marshy areas. On Sylt, it is found primarily in the so-called "Kögen," or drained marshlands. Popular locations for thatch fields include the ditches of the Nösse, which serve as drainage, as well as the transition areas from the Geest to the Wadden Sea.
The harvesting season for thatch begins after the first frost, when the plants die and turn a golden brown. Traditionally, the thatch was cut with a scythe, but today, modern machines are often used to meet demand. After harvesting, the stalks are stripped of leaves and gathered into bundles, which are then thoroughly dried to ensure the high quality of the building material.   
There are currently only a few thatch farmers on Sylt, whose annual yield is sufficient to cover a maximum of two houses. Therefore, a large portion of the required thatch is imported from other countries such as Romania, Ukraine, and Hungary. 
Thatched roofs are a defining feature of Sylt's architecture. In towns like Kampen, thatched roofs are even required to preserve the historic appearance. These roofs not only offer aesthetic advantages but also excellent insulation properties, keeping houses warm in winter and cool in summer. 
Maintaining thatched roofs requires regular maintenance to ensure their longevity. With proper installation and care, thatched roofs can last for several decades, thus contributing to the preservation of Sylt's traditional landscape.