Safe Cell Windows

STRAD provides a specialist range of MOJ-approved prison window solutions designed to enhance security, reduce maintenance, and ensure long-term compliance within live custodial environments. Our products are engineered for durability and performance, supporting safe and efficient operation across the prison estate.

We offer flexible options to suit your project requirements — from targeted repairs and refurbishment of existing window assets to full replacement systems for new build or estate upgrade programmes. Whether extending the life of current installations or delivering a complete new solution, we ensure the right approach is specified for best value and long-term performance.

New Installs

Investing in new custodial products enables facilities to enhance security, improve performance, and ensure full alignment with the latest MOJ standards from day one. New installations provide maximum durability, future-proof compliance, and long-term value, offering a robust, low-maintenance solution designed to meet the demands of modern prison environments.

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  • In many instances, where there are no bars in your window or under spec bars (40mm for example), you need to replace the whole window.

    This kit is designed to fit in a clear aperture and includes the MOJ approved reinforced steel frame, inner vent(s), polycarbonate frame and panel, plus the outer double glazed window.

    They can be fitted by Sanper Construction, or we can provide training to your own in house team.

Refurbishments

Refurbishment provides a cost-effective way to extend the life of existing custodial assets while upgrading security, improving performance, and maintaining MOJ compliance. It minimises disruption within live prison environments, reduces waste, and offers a faster, more efficient alternative to full replacement — delivering strong value without compromising on standards.

  • We can provide new replacement vents for your windows which can be installed by Sanper Construction or your in-house maintenance crew. These can be just the front vent or the vent and rear clamp plate. Our technical team are on hand to provide site surveys, survey forms, or just online assistance.

  • The most abused part of the window is usually the polycarbonate panel. We can provide new MAR (abrasion resistant) panels and the outer polycarbonate frame, if required. Our standard MAR is 8mm thick. The frame can be rear fixed (from the outside) or front fixed (from the inside), we can provide either.

  • To reduce your heating costs, fitting new or replacing old double glazed windows is essential. Our windows feature 6mm hardened glass in both panels and a Planithern coating on the inner panel to reduce incoming UV light and outgoing heat. The opening of these windows is controlled by the rotational vent control knob.

  • These are a popular product for prisons who have correct MOJ spec 50mm bars, but need a Mark 7 model upgrade. They comprise of an inner vent(s), polycarbonate frame and panel, plus an outer double glazed unit.

  • In some cases, the replacement of vents may be not be required. A comprehensive maintenance programme with an additional external gear box cover could be the best and most cost effective solution.