75mm Galvanised Steel Slat - Solid 22g/20g/18g
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What are Galvanised Steel Slats?
Galvanised steel slats are the horizontal interlocking sections that form the curtain of a roller shutter door. Manufactured from galvanised steel, the slats are coated with a protective zinc layer to help resist corrosion and rust, making them suitable for both internal and external applications. They are commonly used in commercial, industrial, retail, and residential roller shutters due to their strength, durability, and cost effectiveness. Galvanised steel slats are available in different thicknesses and styles, including solid, perforated, punched, and insulated options, allowing the shutter to be tailored for security, ventilation, visibility, or thermal performance requirements.
Steel Shutter Slats Information and Buying Guide
Types of Steel Shutter Slats
Types of Steel Shutter Slats
There are several different types of steel roller shutter slats available, each designed for specific levels of security, visibility, insulation, and operational requirements. The most common type is single skin galvanised steel slats, which are manufactured from folded galvanised steel and are available in various thicknesses such as 22G, 20G, and heavy duty 18G. These are widely used for standard commercial and industrial security shutters.
Solid steel slats provide maximum privacy and security by completely closing off the opening, making them ideal for warehouses, industrial units, and secure retail premises. Perforated steel slats include small punched holes that allow limited visibility and airflow while maintaining security, commonly used on shopfronts where product display visibility is important. Punched steel slats feature larger rectangular openings which provide increased vision and ventilation.
Insulated steel slats are double-skinned slats filled with insulating foam, designed to improve thermal efficiency, reduce noise transfer, and provide smoother operation. These are commonly used on industrial buildings, garages, and temperature controlled environments. For higher security applications, extruded steel or reinforced security slats are available, offering increased strength and resistance to attack for premises requiring enhanced protection.
Guide to Roller Shutter Slats
Guide to Roller Shutter Slats
Roller shutter slats are the horizontal profiles that interlock together to form the shutter curtain. Over time, slats can become bent, dented, or damaged, often due to impact, attempted forced entry, or normal wear and tear. In many cases, damaged slats can be replaced individually, allowing the shutter to be repaired without replacing the entire curtain.
However, it is important that replacement slats match the original slat specification. Changing the slat profile, thickness, or material can affect how the curtain rolls on the barrel, the weight of the shutter, and how it travels within the guide rails.
How to Measure Roller Shutter Slats
How to Measure Roller Shutter Slats
When ordering replacement slats, two key measurements are required:
1. Cut Length (Slat Width)
The cut length is the width of the slat excluding the end locks.
This measurement represents the actual metal slat length before the end locks are attached.
2. Overall Width
The overall width is the full width of the slat including the end locks fitted on each side.
End locks help keep the curtain aligned within the guide rails and prevent the slats from moving sideways during operation.
Measuring Tips
Measuring Tips
To ensure accurate replacement slats:
- Remove one of the existing slats if possible and measure it directly
- Measure the cut length without the end locks fitted
- Measure the overall width including the end locks
- Identify the slat profile and height
- Check whether the slats are steel or aluminium
Providing clear photos and measurements can help ensure the correct replacement slats are supplied.
When Slats Can Be Replaced
When Slats Can Be Replaced
Replacing slats is usually possible when:
Only a small section of the curtain is damaged
The remaining slats are in good condition
The barrel, guides, and operating system are still functioning correctly
If the curtain has widespread damage or corrosion, replacing the entire curtain may be more practical.
Replacing roller shutter slats is often a cost effective way to repair a damaged shutter, restoring both the appearance and security of the installation while avoiding the cost of a full shutter replacement.
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Frequently Asked Questions - Replacing Galvanised Steel Shutter Slats
1. What thickness galvanised steel slat do I need?
1. What thickness galvanised steel slat do I need?
The correct slat thickness depends on the size of the opening, security requirements, and frequency of use. Lightweight 22G slats are commonly used for smaller retail shutters, while 20G and heavy duty 18G slats are better suited for larger openings, industrial applications, and higher security requirements.
2. What is the difference between solid, perforated, and punched steel slats?
2. What is the difference between solid, perforated, and punched steel slats?
Solid slats provide maximum privacy and security with no visibility through the shutter. Perforated slats feature small holes that allow limited light, airflow, and visibility, making them popular for retail shopfronts. Punched slats have larger openings to provide greater vision and ventilation while still maintaining security.
3. Are galvanised steel slats suitable for external use?
3. Are galvanised steel slats suitable for external use?
Yes. Galvanised steel slats are designed for both internal and external applications. The galvanised zinc coating helps protect the steel against corrosion and rust, making them a durable and cost meffective solution for commercial, industrial, and residential roller shutters.

