Secure sliding doors (PAS 24) across Greater London
The right door depends on the opening, the room and the way you use the garden. Here is how secure sliding doors tend to work out in practice:
If your Greater London home has a rear garden reached by a side gate or shared alley, the back door is the one to specify with PAS 24 testing and laminated glass.
Replacing an old slider in Greater London that has its glass beads on the outside? That is a weakness a modern internally glazed door removes.
- Anti-lift devices in the head of the frame stop a closed sliding panel being levered up and lifted off its track, which is a classic weakness of older sliders.
- A doorset tested to PAS 24 has resisted a defined set of timed attacks using hand tools, giving an objective benchmark rather than a claim based on the look of the hardware.
- An anti-snap key cylinder is designed to resist the snapping attack used on many older euro cylinders, protecting the lock itself.
Guide prices for secure sliding doors in Greater London
Use these guide prices to budget. They include VAT, fitting and taking away an old door of a similar size. Taller doors, triple glazing and dual colour add to the figure — the online tool shows how much.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 3.0 m | 2 panels | £4,995–£6,095 |
| 3.6 m | 3 panels | £5,595–£6,895 |
| 4.8 m | 4 panels | £6,995–£8,495 |
| 6.0 m | 4 panels | £8,295–£10,095 |
Every size is on the secure sliding doors page.
Daylight and glass in Greater London
At the latitude of Greater London, the midday sun climbs to about 62° in late June but only about 15° in late December, when daylight lasts around 7 h 50 min against 16 h 38 min in midsummer. A south-facing secure sliding door lets that low winter sun deep into the room; on a west or south elevation, solar-control glass keeps summer afternoons comfortable.
Where we fit in Greater London
We cover Islington, Bexley, Barking, Sutton, Croydon, Ilford and the rest of Greater London.
Approvals in England
English Building Regulations treat a new or replacement external door in an existing home as a controlled fitting: it needs a U-value of 1.4 W/m²K or better (or Doorset Energy Rating band C) if more than 60% of it is glazed (Approved Document L), and safety glass in a critical location (Approved Document K). Compliance is arranged through a competent person scheme installer or a Building Control notification, so you get a certificate for your records.
Questions about secure sliding doors in Greater London
How soon can you survey in Greater London?
Surveys in Greater London are booked at a time that suits you, and we offer survey dates when we reply to your enquiry. After you approve the written quote, manufacture is typically 4–6 weeks from survey sign-off, depending on the glass and hardware chosen.
What makes old sliding patio doors insecure?
Older sliding patio doors are often vulnerable because the sliding panel can be lifted off its track, the single-point lock can be forced, the glass beads are on the outside or the cylinder can be snapped. Modern secure sliding doors address each of those weaknesses with anti-lift devices, multipoint locks, internal glazing and anti-snap cylinders.
What is PAS 24?
PAS 24 is the UK enhanced security test standard for doorsets, including sliding doors. A door tested to it has been subjected to timed manual attacks with hand tools, mechanical loading of the panels and locks, and tests on how the glass is held. It applies to the complete doorset as tested, not to individual handles or locks on their own.
Can I upgrade the locks on my existing sliding door?
Sometimes, but upgrading locks alone does not turn an old door into a tested one. A new anti-snap cylinder or a secondary bolt can improve security on a sound door, and our sliding door repairs page covers lock work. If the panel can be lifted out or the glass removed from outside, replacement is usually the better answer.