What You Need to Know About Patio Door Handles: A UK Guide

In this article, we're going to answer all your frequently asked questions about patio door handles. Whether you're dealing with a broken handle, planning a replacement, or simply want to understand more about your sliding patio door hardware, this guide has you covered.

Patio door handles come in various styles and sizes, and choosing the right replacement is crucial for the smooth operation and security of your door. From measuring correctly to understanding the different types available, we'll walk you through everything you need to know to make an informed decision and complete a successful replacement.

Are Patio Door Handles Universal?

No, patio door handles are not universal and will require you to check some key measurements to ensure a replacement sliding patio door handle will fit correctly. Unlike some other door hardware, patio door handles vary significantly between manufacturers and even between different product lines from the same brand.

Several factors make patio door handles non-universal:

• Different fixing centre distances: Manufacturers use various spacing between screw holes, ranging from 122mm to 180mm or more.
• Varying PZ measurements: The distance from the spindle to the keyhole differs depending on the lock mechanism used.
• Handle shape variations: D-shaped, P-shaped, and inline handles each have specific mounting requirements.
• Lock compatibility: Different locking mechanisms require specific handle types.
• Door thickness: Handles must accommodate the specific thickness and construction of your patio door.

Measuring a sliding patio door handle is done the same way as any other uPVC door handle, but it's essential to be accurate to avoid ordering the wrong replacement.

Are Patio Door Handles a Standard Size?

As mentioned above, patio door handles are not a standard size and require two critical measurements to ensure compatibility. However, there are some commonly found sizes in the UK market that you're likely to encounter.

Common Patio Door Handle Sizes:

Fixing Centres (distance between screws):

• 122mm
• 145mm
• 154mm
• 162mm
• 170mm
• 180mm
• 200mm
  

Common PZ Measurements:

• 43mm PZ (older Schlegel-style handles)
• 90mm PZ (Fuhr and some modern systems)
• 92mm PZ (most common on standard patio doors)
• 117mm PZ (less common, specific manufacturers)

How to Measure for a New Patio Door Handle?

Now, let's move on to measuring your sliding patio door handle accurately. When measuring a door handle, you only need to check two measurements, but getting them right is essential for a proper fit.

1. Backplate Fixing Centres

This is the centre-to-centre distance between the two screw fixing holes on your handle backplate.

How to Measure:

• Locate the two screw holes on your handle (usually covered by caps or visible on the inside)
• Measure from the centre of one screw hole to the centre of the other
• This measurement is typically in millimetres and should be exact
• Common measurements: 122mm, 145mm, 154mm, 162mm, 170mm, or 180mm

Top Tip: If your handle is already removed, use a ruler or tape measure and be precise. If it's still fitted, you may need to remove the screw caps to see the holes clearly.

2. PZ Centres (PZ Measurement)

PZ stands for the distance from the centre of the square spindle hole to the centre of the circular keyhole.

How to Measure:

• Find the centre of the square spindle hole (where the spindle passes through)
• Locate the centre of the circular part of the keyhole
• Measure the distance between these two points
• Common PZ measurements: 43mm, 90mm, 92mm, or 117mm

Important Note: The PZ measurement determines compatibility with your door's locking mechanism. Even if the fixing centres match, the wrong PZ will mean your handle won't align with the lock properly.

Additional Measurements to Consider:

While the two main measurements are critical, you may also want to note:

• Overall handle length: Useful for aesthetic matching
• Backplate width: Ensures the new handle covers any marks left by the old one
• Spindle length: Most are standard, but some doors require longer or shorter spindles
• Handle depth/projection: How far the handle sticks out from the door

Visual Reference:

We have a useful visual tool and measuring guide for uPVC door handles that shows exactly where to measure.

Pro Tips for Accurate Measurement:

1. Measure twice: Double-check your measurements to avoid costly mistakes.
2. Take photos: Photograph your existing handle with a ruler alongside it for reference.
3. Check both sides: Ensure both internal and external handles match (if replacing both).
4. Note the brand: If visible, the manufacturer's name can help identify the correct replacement.
5. Consider the lock type: Some handles are designed for specific locking mechanisms.

How Do You Fix a Loose Patio Door Handle?

A loose patio door handle is one of the most common issues and, fortunately, one of the easiest to fix. You can fix a loose door handle very easily without needing to purchase a replacement.

Step-by-Step Guide:

1. Identify the Problem

Most of the time, you will find it's only the screws which have come loose and need tightening up. This happens naturally over time due to:

• Regular use and vibration
• Thermal expansion and contraction
• Settling of the door frame
• The initial installation is not being fully tightened

If you notice any looseness, it’s time to break out the screwdrivers.

2. Gather Your Tools

You'll need:

• Philips (crosshead) screwdriver
• Possibly a flathead screwdriver to remove screw caps
• A cloth to protect the door surface

3. Access the Screws

The fixing screws are usually located on the inside handle. Some may be covered with plastic caps that need to be carefully prised off with a flathead screwdriver.

4. Tighten the Screws

Simply take a Philips screwdriver and tighten the two screws on the inside handle. Don't overtighten, as this can strip the threads or crack the handle. Tighten firmly until the handle feels secure, then test it.

5. Test the Handle

After tightening:

• Check that the handle operates smoothly
• Ensure it returns to the correct position
• Test the locking mechanism
• Verify there's no excessive play or wobble

When Tightening Doesn't Work:

If your problem persists after tightening the screws, this may be because:

• The threads are damaged: The screw holes in the door may be stripped or worn
• The backplate is cracked: Inspect for cracks or damage to the handle backplate
• The spindle is worn: The square spindle may be rounded and not gripping properly
• The locking mechanism has failed: The issue might be with the lock, not the handle

In these cases, you may require a replacement patio door handle. A damaged or worn handle can not only affect functionality but can also compromise your security.

How Do You Replace a Patio Door Handle?

Replacing a patio door handle is straightforward and doesn't require professional help. It's as simple as removing two screws and can typically be completed in minutes.

Before You Begin:

With the measuring complete (which we covered above), ensure you have:

• Your new replacement patio door handle
• A Philips screwdriver
• Any screws or spindles provided with the new handle
• A clean cloth

Step-by-Step Replacement Guide:

Step 1: Remove the Old Handle

You can now just remove the two screws from the inside handle. Some handles may have plastic caps covering the screws that need to be removed first.

Step 2: Extract the Handle

Once the screws are removed, the door handle should just come away from the door. You may need to:

• Gently pull the inside handle away from the door
• Slide it off the spindle
• Remove the external handle from the outside

Step 3: Remove the Spindle

The square spindle connects the internal and external handles. Pull it out through the door once the handles are removed. Make a note of which direction it was installed if it's not symmetrical.

Step 4: Clean the Area

Before fitting the new handle:

• Clean any dirt from the mounting area
• Check the door surface for damage
• Ensure the lock mechanism is clean and functioning

Step 5: Install the New Handle

Assuming you have already ordered your new patio door handle:

1. Insert the spindle through the door from the outside
2. Position the external handle over the spindle and align it with the fixing holes
3. Hold the external handle in place
4. Slide the internal handle onto the spindle from the inside
5. Align the internal handle with the fixing holes
6. Insert the fixing screws (use those provided with the new handle if included)
7. Tighten the screws evenly – don't fully tighten one before starting the other
8. Secure firmly, but don't overtighten

Step 6: Test the Installation

After installation:

• Test that the handle works smoothly in all positions
• Check the key turns freely (if it's a locking handle)
• Ensure the door locks and unlocks correctly
• Verify both handles are secure and aligned
• Test from both inside and outside

Types of Patio Door Handles Available

When replacing your patio door handle, you'll find several types available at GB DIY Store, including: 

1. Inline Handles: Straight design with the grip parallel to the door frame
2. D-Shaped Handles: Ergonomic curved design
3. P-Shaped Handles: Similar to D-shape with different ergonomics
4. Lever Handles: Traditional lever-style operation

By Finish:

Available finishes at GB DIY Store include:

We also have different finishes to either blend in or contrast with your home. These include white, black, silver, gold, and bronze.

Security Considerations

The main consideration when it comes to your patio doors is security. If you’re looking for a replacement handle, make sure to look for security features such as:

Choose Locking Handles: Always opt for handles with euro cylinder locks on accessible doors.

Consider Anti-Snap Cylinders: Upgrade to a high-security cylinder for maximum protection against break-ins.

Check Insurance Requirements: Some home insurance policies require specific security standards for patio doors.

Additional Security Measures:

• Install patio door security bars or restrictors
• Add secondary locks at the top or bottom of the door
• Consider smart locks for modern security systems and alerts
• Ensure adequate external lighting near patio doors

Why Choose GB DIY Store for Patio Door Handles?

In closing, I hope this comprehensive guide answers all your questions about patio door handles. From understanding that handles aren't universal, to measuring correctly, fixing loose handles, and completing a full replacement, you now have all the information needed to maintain or upgrade your patio door hardware successfully.

Here at GB DIY Store, we supply a wide range of tried and trusted replacement uPVC door handles. If you have any more questions that we didn't answer in this article, please feel free to contact us. Or, if you’re ready to get started, browse our complete range of patio door handles and find the right fit for your home today.