Security grilles provide a physical barrier across an opening while retaining visibility and airflow. They are commonly used for shopfronts, shopping centres, counters and other commercial premises where a solid shutter may not suit the space.
The right grille depends on the opening, the level of visibility you want and how the premises operates. This guide explains the main points to discuss when comparing commercial roller grilles.
What is a security grille?
A security grille uses an open curtain or lattice to restrict access. A roller grille travels vertically and rolls up above the opening. A folding or expanding barrier moves sideways or folds away, depending on the design. The available headroom, side space and fixing surfaces help determine which arrangement is suitable.
Where are roller grilles useful?
- Retail shopfronts: retain a view of displays after closing.
- Shopping centre tenancies: separate a shop from a shared mall area.
- Counters and kiosks: close off a service opening while retaining visibility.
- Commercial access points: provide a barrier where ventilation is part of the brief.
A grille is one part of a security plan. Its suitability also depends on the surrounding structure, locking arrangement and site procedures. No door or grille can guarantee protection against every attempted break-in.
How to choose a security grille
Opening size and installation space
Provide the opening width and height, available headroom and side clearances. Include photographs of the surrounding structure if possible. A site assessment can confirm the measurements and fixing requirements before manufacture.
Visibility and curtain design
Compare how much visibility and airflow each design provides, together with its construction and intended application. Explore the KRGS High Security Grille and the wider grille range to find options for your project.
Operation and frequency of use
Tell the team how often the grille will open and close, who will operate it and whether you need manual or motorised operation. Confirm the operating and locking arrangements for the proposed model.
Access, maintenance and servicing
Allow access for inspection and servicing. Discuss the requirements of the premises with your project team, including access and emergency-exit arrangements where relevant. A product selection alone does not establish that the finished installation meets every site requirement.
Security grille or solid roller shutter?
A grille can suit an opening where seeing through the closed curtain is useful. A roller shutter may be more suitable when screening the interior is a priority. Compare the specific models, materials and installation details rather than choosing by appearance alone.
Plan your project with KRGS Doors
Use our roller grille drawings and brochures to start your specification. Confirm the current model, dimensions, finish, operating method and warranty terms with our team before ordering.
Request advice and a quote, or call 1800 897 822. For an existing grille that is difficult to operate or damaged, contact our commercial repairs and servicing team.
Content updated 2 November 2026.