Secure sliding doors (PAS 24) across Cornwall
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:
Ask your insurer whether a tested door or particular locks are a requirement on your Cornwall policy, so the quote can be specified to suit.
Replacing an old slider in Cornwall that has its glass beads on the outside? That is a weakness a modern internally glazed door removes.
- Specifying a tested door when you replace an old slider gives you a clear security standard to compare against, even though Approved Document Q only applies to new homes.
- Internally glazed or secured beads mean the glass cannot be removed from the outside, closing off a route that some older doors left open.
- 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.
Guide prices for secure sliding doors in Cornwall
Pricing is transparent and does not change because you are in Cornwall. The ranges below cover a standard-height door, fitted, with VAT; options are itemised in your quote.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.5 m | 2 panels | £3,295–£4,095 |
| 2.1 m | 2 panels | £3,995–£4,895 |
| 4.0 m | 3 panels | £6,095–£7,395 |
| 4.8 m | 4 panels | £6,995–£8,495 |
Every size is on the secure sliding doors page.
Daylight and glass in Cornwall
At the latitude of Cornwall, the midday sun climbs to about 63° in late June but only about 16° in late December, when daylight lasts around 8 h 01 min against 16 h 26 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 Cornwall
We cover Redruth, Falmouth, St Austell, Truro, Camborne, Newquay and the rest of Cornwall.
Approvals in England
In England, a replacement sliding door is a controlled fitting under the Building Regulations. In an existing home, a door with more than 60% glazing must reach a U-value of 1.4 W/m²K or better (or a Doorset Energy Rating of band C) under Approved Document L, and glass in doors must be safety glazing under Approved Document K. We arrange compliance through a competent person scheme installer or by notifying Building Control, and you receive the certificate.
Questions about secure sliding doors in Cornwall
Do I need building approval for secure sliding doors in Cornwall?
In England a replacement door is a controlled fitting, so compliance is arranged through a competent person scheme installer or Building Control; new openings need a Building Regulations application. We confirm the right route for your property at survey, so the paperwork is in place before fitting.
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.
Is laminated glass worth it on a sliding door?
Laminated glass is worth considering on ground-floor doors that are hidden from the street, because it stays in one piece when cracked and slows anyone trying to break through. It also reduces some outside noise and filters most UV light. Toughened glass is still a safety glass but shatters into small pieces when broken.
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.