Replacing Guide Rails

Guide rails differ depending on whether your shutter is aluminium or steel.

Aluminium Shutter Guide Rails

Aluminium shutters use specific extruded guide profiles designed to match the curtain system.

Important:

• The curtain is manufactured to suit the exact guide profile
• You must replace like for like
• Changing the guide profile can affect operation and fit

If the wrong guide is used, it can cause:

• Poor curtain movement
• Increased wear
• Operational issues

Steel Shutter Guide Rails

Steel shutters typically use a standard U-channel guide, which is more flexible when replacing or upgrading.

Common sizes:

• 65mm guide
• 100mm guide

Steel guides are generally easier to replace or upgrade compared to aluminium systems.

When replacing guide rails, it is essential to match the correct specification.

For Aluminium shutters:

• Match the exact guide profile
• Match internal width and shape
• Ensure compatibility with the curtain and endlocks

For Steel shutters:

• Confirm the guide size (65mm or 100mm)
• Check compatibility with the curtain thickness and endlocks

Using the wrong guide can lead to:

• Curtain not running correctly
• Increased friction and wear
  Potential damage to the shutter system
  
  
  

Aluminium Shutters

Upgrading is not usually recommended.

• The curtain is cut to suit the original guide
• Changing the guide profile may require a new curtain

Steel Shutters

Upgrading is often possible.

• Moving from a 65mm to a 100mm guide can improve performance
• Deeper guides provide better curtain retention
• Improved resistance to forced entry

The deeper the guide, the more secure and stable the shutter will be.

Wind guides (also known as windlock guides) are designed for larger or exposed openings.

They include:

• Deeper guide channels
• Additional profiles to retain the curtain
• Compatibility with windlock endlocks
  

Benefits of Wind Guides:

• Improved resistance to wind pressure
• Reduced risk of the curtain blowing out of the guides
• Increased overall security
  

Wind guides are typically used for:

• Large shutters
• External installations
• Areas exposed to high winds
  

Accurate measurements are essential to ensure correct fit and operation.

Key Measurements:

Guide Depth:-

Measure the depth of the existing guide (Smallest section of U Channel)

External Width:-

Measure the outside width of the guide. (Widest section of U Channel)

Overall Guide Length:-

Full height of the existing guide, including any guide inside the shutter box.

Additional Checks:

• Check condition of fixings and substrate
• Ensure guides are straight and not twisted
• Confirm compatibility with existing curtain and endlocks
  
  

To help us provide the correct replacement guide rails, we will need:

• Photos of the existing guides
• Dimensions (depth, width, and length)
  Type of shutter (steel or aluminium)
• Details of the curtain and endlocks if known
• Installation location (internal or external)

This allows us to match the correct profile and ensure compatibility.

Guide rails must match the original shutter system to ensure:

• Smooth curtain operationCorrect
• alignment
• Proper load distributionCompatibility with
• endlocks and curtain

Incorrect guides can cause:

• Jamming or uneven movement
• Increased wear on components
• Reduced security

Security Considerations

• Deeper guides improve curtain retention
• Wind guides provide additional resistance to forced entry
• Correct installation is essential for performance

Upgrading guide rails on steel shutters can significantly improve security.

• Ensure guides are fixed to a suitable substrate
• Use appropriate fixings for the applicationCheck vertical alignment
• before securing
• Test shutter operation after installation

Incorrect installation can affect both performance and safety.

Guide rails should be replaced if:

• They are bent or damaged
• The curtain is not running
• smoothlyFixings have failed or become loose
• Corrosion has weakened the structure

Replacing damaged guides can prevent further issues and extend the life of the shutter.

Step-by-Step Guide to Replacing Roller Shutter Guide Rails

Replacing roller shutter guide rails is usually straightforward if the correct replacement guides have been selected. Before starting, always make sure the new guides match the existing shutter system, especially on aluminium shutters where the curtain is designed to suit a specific guide profile.

Step 1: Make the Area Safe

Before carrying out any work:

• Isolate the power supply if the shutter is electric
• Make sure the shutter cannot be operated during the repair
• Clear the area around the opening

If the shutter is large or heavy, extra care should be taken before removing any supporting parts.

Step 2: Lower the Shutter Fully

Lower the shutter into the closed position before removing the guides.

This helps:

• Support the curtain during the repair
  Keep the shutter stable
• Reduce movement while the guides are being removed

If the guides are badly damaged and the curtain is jammed, the shutter may need to be supported manually before proceeding.

Step 3: Check How the Curtain is Retained

Before removing the guides, inspect how the curtain sits within them.

Check for:

• Endlocks
• Windlocks
• Brush strips or inserts
• Fixing points

This is important because some curtains will need to be partially released before the guide can be removed.

Step 4: Remove the Existing Guide Rails

Carefully unscrew or unbolt the damaged guides from the wall or structure.

Take care to:

• Support the guide as fixings are removed
• Avoid twisting or forcing the rail
• Keep any fixings if they are being reused

If both guides are being replaced, remove one at a time where possible to help keep the curtain aligned.

Step 5: Inspect the Curtain and Endlocks

Once the guide is removed, inspect the curtain edges and endlocks for wear or damage.

Look for:

• Bent endlocks
• Worn curtain edges
• Damage caused by the old guide
• If damaged parts are not replaced at the same time, the shutter may not run correctly in the new guide.

Step 6: Position the New Guide Rail

Offer the new guide into place and check:

• Height
• Vertical alignment
• Distance from the opening
• Fit around the curtain edge

On aluminium shutters, the guide must match the curtain profile correctly. On steel shutters, confirm the curtain sits properly inside the channel and there is enough clearance for smooth movement.

Step 7: Refit and Secure the Guide

Fix the new guide securely into position using suitable fixings for the substrate.

Make sure:

• The guide is straight and plumb
• Fixings are evenly tightened
• The curtain moves freely within the guide

If replacing both guides, repeat the process on the opposite side and double check alignment across both sides.

Step 8: Check Bottom Clearance and Curtain Travel

Once the guides are fixed, carefully test the shutter movement.

Check:

• The curtain enters the guides correctly
• There is no rubbing or jamming
• The bottom rail closes evenly
• The shutter runs smoothly from top to bottom

If the shutter is electric, reconnect the power only once everything has been secured and checked.

Step 9: Test Operation Fully

Run the shutter through a full open and close cycle.

Look for:

• Smooth operation
• Equal travel on both sides
• No excessive noise
• Correct closing position

If the shutter has windlocks, make sure they engage correctly within the guide system.

Step 10: Final Checks

Once installed, carry out a final inspection.

Confirm:

• All fixings are tight
• Guides are secure
• Curtain is aligned properly
• Safety devices and controls still work correctly

A properly fitted guide rail should improve shutter operation, security, and reliability.