
Owner-managed roastery for fair-trade specialty coffees from traditional drum roasting in Mainz-Kastel.

Kaffeerösterei Kastel
Mainz-KastelNew on Amplifa
About us
Kaffeerösterei Kastel is an owner-managed specialty coffee company located at Frankfurter Straße 22 in Mainz-Kastel. Only fair-trade green coffee is roasted, sourced through the Hamburg coffee importer Rehm & Co (Benecke Coffee GmbH & Co KG, Fairtrade FLO-ID 1033). The refinement is done by traditional drum roasting over a gas flame, with the beans heated slowly and gently at low temperatures to fully develop their aroma. Roasting takes place close to consumption, i.e. coordinated with dispensing and sales; customers may also attend the roasting sessions without registration. The range includes 14 different coffees from India, Ethiopia, Brazil, Guatemala, Mexico, Nicaragua, Colombia and Costa Rica, complemented by individual coffee blends developed on site together with the owner. Distribution takes place via retail store sales, an online shop with postal shipping, and gastronomy dispensing partners. In addition, the range includes chocolate specialties, flavored sugar and coffee-related accessories.
- Site
- Mainz-Kastel
- Processes
- Coffee roasting (drum roasting, slow and gentle at low temperatures over gas flame,, Drum roasting (slow and gentle), individual coffee blends on site, Postal shipping / online shop, Sale of chocolate specialties and coffee accessories
- Materials
- Green coffee (fair trade, Fairtrade FLO-ID 1033), Drum roasting, Fairtrade green coffee (FLO-ID 1033)
- Certificates
- Fairtrade (green coffee sourcing, FLO-ID 1033)
- Industries
- Coffee roasting, Retail / gastronomy supply
- 01
Green coffee purchasing via Fairtrade-registered import partner (Rehm & Co)
- 02
Traditional drum roasting over gas flame at low temperatures
- 03
Individual blends on site
- 04
Retail store sales, online shop and postal shipping
Green Coffee & Roasting Process
Drum roasting
Traditional roasting process over a gas flame in which the green coffee is refined slowly and gently at low temperatures.
Fairtrade green coffee (FLO-ID 1033)
All green beans are sourced exclusively fair-trade through the Fairtrade-registered company Rehm & Co from Hamburg.
Locations

Mainz-Kastel
DERoastery, retail store sales, online shop
- Lot size
- Roasting close to consumption, no mass production
- Materials
- Fair-trade green coffee from India, Ethiopia, Brazil, Guatemala, Mexico, Nicaragua, Colombia and Costa Rica
- Drum roaster (gas flame)
Product Range


Inside the production



Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Coffee roasting (drum roasting, slow and gentle at low temperatures over gas flame,Other | – | – | 500 g (packets in the shop) | – | Green coffee (fair trade) |
Additional services
Fairtrade & Origin
The green coffee is sourced exclusively through the Fairtrade-registered coffee importer Rehm & Co (Benecke Coffee GmbH & Co KG, FLO-ID 1033); the certificate can be viewed in the store.
| Evidence | Mainz-Kastel |
|---|---|
| Fairtrade (green coffee sourcing, FLO-ID 1033) |
History
- 2019
First trip of the owner to the coffee origin in Colombia (Quimbaya region, Quindio), accompanied by the green coffee import partner Thomas Stehl (Hamburg).
- 2025
Price adjustment as of 01.04.2025 due to sharply increased green coffee prices.