Short answer: A galvanized steel roller shutter is a motorised security closure in which slats roll-formed from hot-dip galvanized steel sheet wind around a barrel to close an opening. With a wall thickness of 0.75–1.20 mm, 77/97/115 mm slats and 2.00 mm side guide rails, it provides high resistance to impact and burglary at shop, warehouse, factory and hangar entrances.
The galvanized steel roller shutter is the most widely used security closure among rolling systems. However, there is no single type of product behind the word "roller shutter"; material quality, slat profile, wall thickness and series selection directly determine where and how the shutter will perform. In this article we explain what a galvanized steel roller shutter is, how it is manufactured, which series are available and which combination is used in which sector.
What is a galvanized steel roller shutter and how is it manufactured?
Galvanizing is the process of coating the surface of steel with zinc to protect it against corrosion. In hot-dip galvanizing, steel sheet is passed through a bath of molten zinc, forming a metallurgically bonded protective layer on the surface. This layer acts as a barrier between the steel and moisture and oxygen; even if a small scratch forms on the surface, the zinc continues to protect the steel to a certain extent.
At Pack Door's production facility in Tuzla, coils of galvanized sheet are fed into the roll-forming line. The line passes the sheet through successive rollers, shaping it into the slat profile. The slats produced are interlocked, cut to the size of the opening and prepared for winding onto the barrel. If required, the surface is coloured with electrostatic powder coating from the RAL chart, adding a second layer of protection on top of the galvanized coating.
The parts that make up a galvanized roller shutter
- Slat: Galvanized steel profile with a face width of 77, 97 or 115 mm and a wall thickness of 0.75–1.20 mm.
- Side guide rail: 2.00 mm galvanized, with brush seals; guides the slats and holds them against lateral forcing.
- Bottom locking profile: The reinforced profile at the very bottom; it sits on the floor and provides resistance against lifting.
- Box: Galvanized or aluminium shutter box; gathers the slats within a narrow headroom.
- Drive: Central motor, side motor or tubular motor; a manual operation option is also available.
- Safety: Photocell, bottom safety edge, limit switch, safety brake (anti-fall device) and emergency manual release.
What galvanized steel roller shutter series are available?
Pack Door manufactures galvanized steel roller shutters in three series under the Kepenk Merkezi brand. The series is chosen according to whether the opening prioritises security, insulation or shopfront display.
KM Çelik: standard galvanized steel roller shutter
This is the main series, with high-strength single-wall galvanized slats, used for warehouse dispatch doors, factory entrances, high-street shops and hangars in organised industrial zones (OSB). With 77, 97 and 115 mm slat options and a wall thickness range of 0.75–1.20 mm, it adapts to both narrow and wide openings.
KM Poliüretan: insulated and quiet series
High-density polyurethane foam is injected into a double-wall slat. With 55 and 77 mm slat options, it is preferred where heat and sound insulation matter, such as pharmacies, boutiques, supermarkets, villa garages and cold room fronts. It runs on a tubular motor or a central motor.
KM Delikli: shopfront shutter
With micro-perforated or polycarbonate vision-panel slats, it maintains night-time security while keeping the shopfront display visible. It allows natural air circulation, and can also be produced in combination with solid slats, with a solid lower section and a perforated upper section.
Where is a galvanized steel roller shutter used?
The application area of a galvanized steel roller shutter covers every opening where the need for impact resistance and security is high. The table below summarises which series and slat type stand out in common use scenarios. The final choice is always made during the site survey according to the opening size, wind load and frequency of use.
| Application | Leading series | Slat / wall thickness approach | Note |
|---|---|---|---|
| High-street shop | KM Çelik or KM Delikli | 77 mm (97 mm for wide shopfronts), 0.75–0.90 mm | Perforated or vision-panel slats if shopfront display is required |
| Warehouse dispatch door | KM Çelik | 97–115 mm, 1.00–1.20 mm | Impact resistance against forklift and pallet traffic |
| Factory entrance | KM Çelik | Thick-walled slat | Industrial motor and safety brake for intensive cycles |
| Jeweller and bureau de change | KM Çelik | Thick-walled, high-mass slat | Reinforced locking profile |
| Industrial zone hangar | KM Çelik | 115 mm, 1.00–1.20 mm | Strong barrel and motor for wide openings and wind load |
| Villa garage, pharmacy | KM Poliüretan | 55 / 77 mm double-wall | Quiet tubular motor, heat and sound insulation |
In addition to these, automotive service centres and paint shops, 3PL warehouses and bonded warehouse docks are also places where galvanized steel roller shutters are frequently installed. The common denominator is a wide opening, intensive use and high security expectations.
Field note: At warehouse doors, during the site survey we look not only at the size of the opening but also at the traffic in front of the door. On a shutter at a point where forklifts turn, the side guide rail is at risk of being struck; in this case we recommend a protective barrier in front of the guide rail. In shops, we check the distance between the closed shutter and the shop window glass; signage, awnings or air-conditioning outdoor units can restrict the space for the box.
Galvanized steel roller shutter or aluminium roller shutter?
Both materials are used in roller shutters, but their strengths lie in different areas. Galvanized steel stands out for the highest impact resistance and for warehouse and industrial use; it is an economical and durable solution for wide openings. Aluminium, on the other hand, offers advantages for shopfront aesthetics and in coastal and humid climates thanks to its rust-free nature, light weight and anodised/RAL colour options. To see the properties of aluminium in detail, read our article what is an aluminium roller shutter and where is it used.
Common mistakes
- Using thin slats on a warehouse door: A 0.75 mm slat that is adequate at shop scale can quickly deform on a wide warehouse opening exposed to impact and wind.
- Assuming galvanizing "never rusts": Galvanizing significantly delays corrosion, but deep scratches and cut edges need maintenance. In coastal environments and those with chemical vapours, aluminium should be considered.
- Choosing single-wall slats where insulation is expected: In front of a heated or cooled area, single-wall slats do not deliver the expected comfort; a polyurethane-filled series is needed.
- Neglecting the side guide rail: However thick the slat, a thin and weak guide rail becomes the weakest link in the system.
- Using a product that is not made to measure: Adapting a standard-size shutter to an opening causes side gaps and friction in the rail.
Frequently asked questions
How long does a galvanized steel roller shutter last?
Its lifespan depends on wall thickness, environmental conditions, the number of daily cycles and the maintenance routine. When hot-dip galvanizing and electrostatic powder coating are used together, a long service life is achieved even in humid environments. With periodic maintenance, the life of moving parts such as the motor, springs and guide rails is also extended.
Can a galvanized roller shutter be painted?
Yes. Pack Door colours galvanized steel roller shutters with electrostatic powder coating from the RAL chart. The coating provides aesthetic harmony and also forms an additional protective layer on top of the galvanized coating.
Can a galvanized steel roller shutter also be operated manually?
Yes, a manual operation option is available. However, for wide and heavy shutters, motorised operation is recommended for both convenience and user safety. Motorised systems include a chain or crank manual override mechanism for power cuts.
Conclusion and next step
With hot-dip galvanized roll-formed slats, 2.00 mm side guide rails and a wide range of series, the galvanized steel roller shutter is used as a security closure on many types of openings, from shops to hangars. The right series, slat and wall thickness should be chosen according to the use scenario; we explain the steps of this choice in detail in our galvanized steel roller shutter selection guide. You can see the product's technical specifications on our galvanized steel roller shutter page and submit a free site survey and quote request for your opening.
