What are uPVC sliding patio doors?
A uPVC sliding patio door is a made-to-measure door with frames of unplasticised polyvinyl chloride, a rigid plastic extruded into multi-chambered profiles and reinforced with steel inside. One panel, or sometimes two, slides on rollers past the other along a twin-track frame. It is usually the least expensive way to put a wide glazed door into a house, and the profiles insulate well on their own because plastic conducts far less heat than metal.
uPVC sliders suit like-for-like replacement of an older patio door, back doors onto a garden or conservatory, and rental or family homes where an easy-clean, no-paint frame matters more than the slimmest sightlines. White is standard, and woodgrain or colour foils such as anthracite grey are available. Because uPVC is less stiff than aluminium, the frames and interlocks are chunkier and individual panels are smaller, so our uPVC range runs up to about 3.6 m overall.
Price depends mostly on overall width and whether the door has two or three panels, then on colour foils, glass upgrades, threshold height and locking hardware. A straight replacement in an existing opening keeps costs down, while widening the opening adds structural work and a separate price. We survey new and replacement doors free and fix the price in a written quote before ordering.
Who are they for?
Best suited to
- Like-for-like patio door replacement
- Budget-conscious projects
- Matching existing white or woodgrain uPVC windows
- Openings up to about 3.6 m wide
Worth considering
- Frames and interlocks are noticeably wider than aluminium, so you see less glass in the same opening.
- Panel sizes are smaller, so very wide or very tall openings need a different material.
- Colour foils add cost and can look less crisp up close than powder-coated aluminium.
Why choose uPVC sliding patio doors?
- Multi-chambered uPVC profiles trap still air inside the frame, so the frame itself insulates well without needing a separate thermal break.
- Steel reinforcement inside the main profiles keeps the frame rigid, holds the locking hardware firmly and stops the sliding panel flexing over the years.
- uPVC frames never need painting or staining; an occasional wipe with warm soapy water keeps white or foiled finishes looking clean.
- As the least expensive sliding door material, uPVC lets you replace a draughty older patio door with modern double glazing on a modest budget.
- A two-panel uPVC slider usually fits the same opening as an old patio door, so a straight swap avoids building work and typically takes a day.
- Woodgrain and colour foils, including anthracite grey and black, let a uPVC door match existing windows instead of appearing as a white frame on a coloured elevation.
- Shoot-bolt or hook locking on the sliding panel, plus anti-lift devices, help stop the panel being lifted or levered out of the frame from outside.
- Compressible gaskets and brush pile seals along the interlock reduce the draughts and rattles that an older patio door with worn seals often suffers from.
Typical specification
| Overall width (our range) | About 1.5 m to 3.6 m |
|---|---|
| Panels | Two panels up to about 3 m; three panels at around 3.6 m |
| Typical panel height | Standard 2.1 m; taller panels depend on the profile and are confirmed at survey |
| Frame | Multi-chambered uPVC with internal steel reinforcement |
| Typical whole-door U-value | Around 1.3–1.6 W/m²K double glazed, depending on profile and glass |
| Glazing | Toughened double glazing as standard; laminated available |
| Security | Multi-point locking; systems available tested to PAS 24 |
| Finishes | White as standard; woodgrain and colour foils available |
Figures are typical and vary by system and size; your quote confirms the exact specification.
How much do uPVC sliding patio doors cost?
As a guide price, a 1.8 m two-panel uPVC sliding patio door is £1,895–£2,295 fitted, inc VAT, at standard 2.1 m height; a 2.4 m door is around £2,195.
| Overall width | Typical panels | Guide price (fitted, inc VAT) |
|---|---|---|
| 1.5 m | 2 panels | £1,695–£2,095 |
| 1.8 m | 2 panels | £1,895–£2,295 |
| 2.1 m | 2 panels | £1,995–£2,495 |
| 2.4 m | 2 panels | £2,195–£2,695 |
| 3.0 m | 2 panels | £2,495–£3,095 |
| 3.6 m | 3 panels | £2,895–£3,495 |
Guide prices for a standard 2.1 m high door, supplied and fitted, including VAT and removal of an old door of similar size. Your price is fixed in a written quote after survey.
Options and extras
- Foiled colours. Anthracite grey, black, cream or woodgrain foils on one or both faces, for an extra charge.
- Glass. Toughened double glazing as standard, with laminated, obscure or solar-control units available.
- Panel layout. Choose which side slides, or a three-panel layout for openings beyond about 3 m.
- Handles. Lever or pull handles in white, black, chrome or gold-effect finishes, with a key lock on the outside.
- Threshold. A standard threshold for a straight swap, or a lower threshold where the floor build-up allows.
- Trims and cills. A matching uPVC cill, add-on trims and internal finishing so the new door sits neatly against existing plaster and brick.
Lead times and fitting
Lead time: Typically 2–4 weeks from survey sign-off.
Fitting: Typically 1 day for a straight swap in an existing opening.
Nothing is ordered until you confirm the surveyed specification in writing. See how it works.
Rules and approvals
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.
Wales
In Wales, replacement doors are covered by the Building Regulations as applied in Wales, including the Welsh Part L energy requirements and safety glazing rules. Compliance is arranged through a competent person scheme installer or your council's Building Control, and the certificate is kept with your property records.
Scotland
In Scotland, replacing a door like for like in a house does not usually need a building warrant, but the new door must still meet the Scottish building standards for energy and safety. Forming or widening an opening is different: that needs a building warrant from the council before work starts.
Northern Ireland
In Northern Ireland, the Building Regulations (Northern Ireland) apply through your district council's building control service, with energy guidance in Technical Booklet F1. Work in Northern Ireland is by arrangement, and we confirm the approval route for your property at survey.
UPVC sliding patio doors: common questions
How much do uPVC sliding patio doors cost?
uPVC sliding patio doors start from a guide price of £1,695 for a 1.5 m two-panel door, fitted, inc VAT, at standard 2.1 m height. A 2.4 m door is a guide £2,195–£2,695, and a 3.6 m three-panel door is around £2,895. Coloured foils, glass upgrades and a low threshold move the figure up, and the final price is fixed in a written quote after survey.
What sizes do uPVC sliding doors come in?
uPVC sliding doors are made to measure, so they come in any size within the system limits rather than set sizes. Our uPVC range covers overall widths from about 1.5 m to 3.6 m at standard 2.1 m height. Two panels cover most openings up to about 3 m, and beyond that a third panel is added. For larger openings, aluminium carries bigger panels.
How quickly can a uPVC patio door be fitted?
A uPVC sliding patio door is typically made in 2–4 weeks after you sign off the surveyed specification, the shortest lead time of the sliding door materials. A straight swap in the same opening typically takes 1 day, including removing the old door, fitting, sealing and making good inside. Times are typical rather than promised, and foiled colours can add a little time.
Are uPVC sliding doors secure?
uPVC sliding doors are secure when the sliding panel has multi-point locking, anti-lift protection and steel reinforcement in the frame. Systems are available tested to PAS 24, the UK enhanced security standard for doorsets. Laminated glass adds resistance to breaking through, and a key-locking handle stops the door being opened from inside if a pane is broken.
Are uPVC sliding doors energy efficient?
uPVC sliding doors are energy efficient because the plastic frame conducts little heat, with whole-door U-values typically around 1.3–1.6 W/m²K double glazed, depending on profile and glass. In England, a replacement door in an existing home with more than 60% glazing must achieve 1.4 W/m²K or better, so the sealed unit is specified to meet it. Wales, Scotland and Northern Ireland set their own energy requirements.
Do I need permission to replace a patio door with a uPVC slider?
In England, replacing a patio door on a house is usually permitted development if the new door looks similar, though flats, listed buildings and Article 4 areas may need consent. The work must be done by a competent person scheme installer or notified to Building Control, and the glass must be safety glazing. Wales, Scotland and Northern Ireland have their own planning and building rules.
How do I maintain a uPVC sliding door?
A uPVC sliding door needs only light maintenance: wipe the frames with warm soapy water, avoid abrasive cleaners that dull the surface, and vacuum the track so grit does not wear the rollers. Lubricate the lock keeps and handle mechanism once a year. If the panel drags, the rollers can usually be adjusted rather than replaced. Check the drainage slots in the outer frame after autumn leaf fall, as blocked slots let water sit in the track.
Should I choose uPVC or aluminium for a sliding door?
Choose uPVC if budget and a quick, simple replacement matter most, and aluminium if you want slimmer frames, bigger panels or a powder-coated colour. uPVC insulates well and costs less, but its frames are wider and its panels smaller. Aluminium suits openings over about 3.6 m and modern extensions. Our aluminium vs uPVC guide sets out the differences.