Patio door servicing

Regular servicing prevents the mechanical failure of expensive multi-point locking systems and ensures your home remains energy-efficient and secure. A professional service typically extends the lifespan of your doors by years, saving you the thousands of pounds required for a full replacement.

What Does the Work Involve?

• Full Inspection: Checking rollers, tracks, and wheels for signs of flat spots, corrosion, or debris.
• Track Deep Clean: Removing compacted dirt and grit that causes friction and damages the rolling mechanism.
• Mechanical Lubrication: Applying specialist, non-silicone or dry-film lubricants to rollers, hinges, and locks to prevent "gumming."
• Realignment: Adjusting the door height and "toe-and-heeling" the glass if necessary to stop the door dragging on the frame.
• Hardware Check: Tightening handles, keeps, and multi-point locking systems to ensure smooth operation.
• Seal Assessment: Inspecting weather strips and gaskets for shrinkage or perishability that causes draughts.
• Drainage Clearing: Ensuring internal drainage channels and "weep holes" are clear to prevent water ingress and internal rot.

Typical Costs

Prices for patio door servicing vary based on the door type (sliding vs. bifold) and your location in the UK. Homeowners in London and the South East should expect to pay at the higher end of these ranges.

Factors affecting the final bill include the age of the door (obsolete parts can be expensive to source) and whether the glass units need to be removed to access the internal mechanisms.

How Long Does It Take?

• Routine Service: 1–1.5 hours. This covers cleaning, lubrication, and minor alignment adjustments.
• Roller Replacement: 2–3 hours. Sliding doors often need to be completely deglazed or lifted off the tracks, requiring two people.
• Bifold Realignment: 1–2 hours. A complex task involving the adjustment of multiple hinges to ensure the "lead" door catches correctly.
• Seal Replacement: 1 hour per door. A straightforward task if the correct gasket profile is in stock.

DIY or Professional?

While a homeowner can easily vacuum tracks and apply a little lubricant, professional servicing is highly recommended for anything involving door removal. Modern double or triple-glazed patio doors are incredibly heavy; one slip can shatter the glass or cause serious injury. Furthermore, complex multi-point locks are easy to "jam" if adjusted incorrectly, potentially locking you out of your home. A professional will also ensure that any work complies with Building Regulations Part L (thermal efficiency) and Part Q (security).

Choosing the Right Tradesperson

• Check Credentials: Look for specialists in "Window and Door Repairs" or members of FENSA or CERTASS.
• Specific Experience: Ask if they have worked on your specific door type (e.g., aluminium bifolds vs. uPVC sliders).
• Insurance: Ensure they hold valid Public Liability Insurance to cover accidental glass breakage.
• Questions to Ask:
  • Are replacement parts like rollers or seals included in the quote?
  • Do you offer a guarantee on the adjustments made?
  • Will you provide a written report on the condition of the seals and frames?

UK Regulations

• Part L: Repairs must not degrade the thermal performance of the door. Using the wrong seals can lead to significant heat loss.
• Part Q / PAS 24: If replacing locks or handles, they should meet modern security standards to satisfy home insurance requirements.
• Safety Glass: Any replacement glass must be toughened or laminated to BS EN 12600 standards.

Common Problems

• Dropped Doors: Over time, the weight of the glass causes the door to sag. If not adjusted, this will eventually snap the locking drive gear.
• Gritty Tracks: Dirt acts like sandpaper on nylon rollers, wearing them down until the door becomes impossible to move.
• Perished Gaskets: Rubber seals shrink over 10–15 years, leading to whistling draughts and potential damp issues around the frame.
• Misaligned Keeps: If the door doesn't "click" easily into place, the locking bolts are hitting the frame, which will eventually break the handle mechanism.

Frequently Asked Questions

How often should I have my patio doors serviced?

For most UK homes, a professional service every 2–3 years is sufficient. However, if you live in a coastal area, the salt air can corrode moving parts faster, making an annual check-up a wise investment.

My sliding door is heavy to move; do I need new doors?

Rarely. In 90% of cases, "heavy" doors are caused by worn rollers or dirty tracks. Replacing the rollers and cleaning the track usually makes the door glide with a single finger again.

Can I use WD-40 on my door tracks?

It is generally discouraged. Standard WD-40 is a degreaser, not a long-term lubricant, and its residue can actually attract more grit. Use a specialist silicone spray or a dry PTFE lubricant instead.

Why is there water sitting in my bottom door track?

Patio door frames are designed to collect a certain amount of water and drain it away through "weep holes." If water is pooling, these holes are likely blocked with debris and need clearing.

Will a service fix a draughty bifold door?

Yes. Draughts are usually caused by the doors being slightly out of alignment or the gaskets having flattened over time. A professional can adjust the hinges and replace the seals to restore the airtight fit.

Is it worth repairing old uPVC patio doors?

If the frames are structurally sound and the glass isn't "blown" (misted up), a service and new hardware can make them feel like new for a fraction of the cost of replacement.