The Constant Tension Retractable (CTR) Roof System is a new greenhouse roof solution developed by NP Structures to deliver precise, controllable climate management.
Unlike conventional retractable roofs, the CTR system is designed to be held securely at any position along its travel. A constant-tension roll-off mechanism maintains stable roof tension during movement and at rest, allowing growers to precisely regulate light and airflow, even in changeable or windy conditions.
The roof opens from the apex downwards, enabling warm air to be released where it naturally accumulates. This allows internal temperatures to be reduced with smaller, incremental openings, supporting a more predictable and stable growing environment. The approach also enables crops to be hardened off in situ, reducing plant handling and the need for additional growing space.
The CTR Roof System has been developed for professional greenhouse applications and will be presented as a demonstration model at the booth.
All media from NP Structures
To the MEDIA CENTERNP Structures will be presenting its new Constant Tension Retractable (CTR) Roof System at IPM Essen, offering growers a new approach to greenhouse climate control.
The CTR system is designed for fine adjustment, allowing the roof to be positioned and held securely at any point along its travel. By maintaining constant tension, the system enables precise control of light and airflow, even in changeable or windy conditions.
Venting begins at the apex of the structure, releasing warm air where it naturally accumulates and allowing internal temperatures to be reduced with minimal roof movement. This supports more stable growing conditions and enables crops to be hardened off in situ, reducing the need for additional space or plant handling.
Visitors can see a demonstration model of the CTR Roof System on the NP Structures stand.
Hall 7 | Stand 7A28.2
NP Structures is a UK-based designer and manufacturer of innovative growing structures. Established in 1969, the company works with commercial growers, research facilities, and institutions worldwide to develop practical solutions that respond to real-world growing challenges.
All systems are designed and manufactured in-house in the UK, allowing NP Structures to continually refine structure, ventilation, and environmental control technologies. The company specialises in modular and bespoke greenhouse and polytunnel systems that enable greater control over light, airflow, and growing conditions - supporting efficient workflows, resilient crops, and long-term operational performance in demanding environments.
Plan your visit to the trade fair!
