Create sunrise/sunset transitions

cedar ensures long-lasting performance with minimal maintenance

ventilation system

and a powder coated galvanized steel frame

10 Years Limited Warranty

Hoklartherm | Riga Greenhouse Drop Door Extension Kit Alton Greenhouse Door Create sunrise/sunset transitionsRiga Door Extension Kit Raise Your Riga Greenhouse for Enhanced Versatility The Riga Greenhouse Drop Door Extension Kit is designed to elevate your Riga greenhouse by 20 inches when mounted on a stem wall, providing additional height and improved functionality. This kit is compatible with all Riga greenhouse models and includes extensions for both doors, ensuring a seamless fit. Key Features: Increased Height: Raises the greenhouse by 20 inches to