Composite vs uPVC door: which is worth it?
A uPVC door is the cheaper choice, usually a few hundred pounds less than a composite door of the same size. A composite door costs more because it is thicker, more secure and better insulated, with a tougher finish that holds its colour for longer. uPVC suits a budget back or side door; composite is the one most people choose for a main front door, where the security and insulation earn their keep.
Composite door vs uPVC door: the cost
| Option | Range | Typical | Priced |
|---|---|---|---|
| Composite door | £1,000 to £2,500 | £1,500 | supplied and fitted |
| uPVC door | £700 to £2,200 | £1,100 | supplied and fitted |
Costwise guide prices, reviewed June 2026, not quotes.
Composite door vs uPVC door: the difference
| Factor | How they compare |
|---|---|
| Typical cost | uPVC is the cheaper option; a composite door costs a few hundred pounds more for the same size, fitted. |
| Security & insulation | Composite is a thick, solid-core door that is more secure and better insulated; uPVC is lighter and thinner. |
| Looks & finish | Composite mimics timber and holds its colour; uPVC is plainer and can discolour over many years. |
| Best for | uPVC: a budget back or side door. Composite: a secure, warm, good-looking front door. |
What the extra money actually buys
A composite door is not one material. It is a solid core, usually laminated timber or a dense insulating foam, held in an inner frame and usually finished with a moulded glass reinforced plastic skin, then hung in its own outer frame. Brand is the single biggest thing moving the price, and it runs from budget GRP doors up to names like Solidor and Rockdoor. A uPVC door is an extruded plastic profile with hollow internal chambers, normally stiffened with steel or aluminium, filled with glazing or panels. That is why a composite slab is the heavier of the two in the hand.
On our guide figures a composite door is £1,500 supplied and fitted at the typical, against £1,100 for uPVC. Be careful with that £400 gap, because the uPVC typical is an average across front and back doors, French doors and sliding patio sets, so it is not the figure for a single door. Like for like, a plain composite door in a standard colour is £1,000 to £1,400 and a plain uPVC front or back door is £700 to £1,200. The two overlap between £1,000 and £1,200, and the single-door gap is nearer £200 to £300. Roughly two thirds of a composite quote is the door unit itself, and fitting is the rest.
Security comes from the doorset, not the material
Approved Document Q, the security part of the building regulations for England, applies to new dwellings only, which includes a home formed by a material change of use. It asks for secure doorsets, either shown by test to meet PAS 24, the BSI specification for enhanced security performance of doorsets and windows, or built to the dimensions and hardware set out in its own Appendix B. A replacement door in an existing house sits outside all of it. No security standard applies to it, and nothing in the regulations makes anyone check. Whatever protection you end up with, you get because you asked for it.
So ask the same three questions of both materials. Is the complete doorset, not just the slab, tested to PAS 24? Is the cylinder an anti-snap pattern rather than a basic euro cylinder? Does the multipoint lock throw hooks or mushroom bolts into the frame at several points, top and bottom, instead of relying on one latch and a deadbolt?
Those answers are what you are comparing, not the material. PAS 24 tests the whole doorset, so a tested uPVC set and a tested composite set have passed the same thing, and an untested door of either material has passed nothing. Fitting counts as much: the frame has to be fixed and packed properly into the opening, because as our uPVC guide puts it, a door hung out of true will drop, stick or let in draughts.
Insulation and the U-value a replacement door must meet
In England, replacing the whole door including its frame makes it a controlled fitting under Approved Document L. Table 4.2 sets the limit at 1.4 W/m²K, or a Doorset Energy Rating of band B, dropping to band C where more than 60 per cent of the internal face is glazed, and the unit has to be draught-proofed. Fitting a new slab into the existing frame is not a controlled fitting, and that work does not have to meet the energy efficiency requirements at all. Wales, Scotland and Northern Ireland have their own building regulations.
The limit applies whichever material you pick, so it is not what decides between them. What it does give you is something to check: ask for the U-value or the Doorset Energy Rating of the doorset you are being quoted, in writing. Use an installer registered with a competent person scheme, such as FENSA or CERTASS, and they self-certify the work instead of you notifying building control. Keep the certificate, because a buyer's solicitor is likely to ask for it. And whatever the figure on the paperwork says, a frame that is not packed and sealed properly will still let draughts through.
Colour fade, weathering and upkeep
Composite holds its colour better than uPVC, and that is a real part of what the premium buys, but it is not immune. A dark, south-facing composite door can fade over years of strong sun, deep scratches are hard to disguise, and in the rare case where a slab bows it usually cannot be straightened, so it is replaced. Our composite guide puts repairs at about £150 for minor work and £280 for a full respray, which is worth knowing before you treat a marked door as a write-off.
uPVC is the plainer surface, and our uPVC guide notes that early uPVC had heat issues with darker finishes that composite takes without the same trouble. It also treats discolouring and draughts on a door from the 1990s as the sign that door owes you nothing, and it makes the point that the hinges, handles and multipoint lock usually tire before the door itself, all of them replaceable for far less than a new door. Composite doors carry the same class of hardware, so give either one the same small amount of care: wash the frame and seals, and keep the lock and hinges lubricated. Ask in writing what the guarantee covers, and whether colour is included.
When uPVC is genuinely the right choice
Do not default to the dearer door. A uPVC front or back door at £700 to £1,200 is the sensible pick for a back door, a side or utility entrance, a rental, or any door you will replace again when the rest of the house is done. Those doors take less weather and less use, and the money is better spent elsewhere.
It is also the answer for glazed sets, because composite is mostly sold as a single front or back door. Our uPVC guide prices French doors at £1,100 to £1,800 and sliding patio doors at £1,300 to £2,200 supplied and fitted. If you want slimmer frames, our French doors guide puts aluminium sets at £1,800 to £3,000 and hardwood at £2,500 to £4,000, so on a wide opening the real choice is between those rather than between composite and uPVC.
If you are doing two doors at once, the like-for-like saving from putting uPVC on the back is nearer £200 to £300 than the £400 the headline typicals suggest. On the front door that is roughly the step from a plain composite in a standard colour at £1,000 to £1,400 up to a colour finish with decorative glass at £1,400 to £1,800. A side panel is the bigger decision: it adds £250 to £450, which takes a composite door with one sidelight to £1,500 to £2,200 fitted. Spend the money on the door you look at every day.
Common questions
For a main front door, most people find it is. A composite door is thicker, more secure and better insulated, and it holds its finish longer, which matters on the door you use and see most. For a back or side door that gets less weather and use, a cheaper uPVC door is usually fine.
A composite door generally lasts longer and keeps its appearance better, because the solid core resists warping and the coloured skin does not fade like uPVC can. Both will last many years if fitted well, but composite is the more durable of the two, which is part of what you pay extra for.
In England a replacement door is a controlled fitting when the whole unit including the frame is replaced, so it has to meet Approved Document L. There are two routes: use an installer registered with a competent person scheme such as FENSA or CERTASS, who self-certifies the work instead of you getting building regulations approval, or notify your local building control body yourself. Keep the certificate either way, because a buyer's solicitor is likely to ask for it. Fitting a new slab into the existing frame is not a controlled fitting and does not have to meet the energy efficiency requirements. Wales, Scotland and Northern Ireland have their own building regulations.
Neither, by material alone. Approved Document Q, the security part of the building regulations for England, applies to new dwellings only, so a replacement door in an existing home has no security standard it has to meet. What you are really comparing is the doorset and the hardware. PAS 24, the BSI specification Approved Document Q relies on, tests the complete doorset rather than the material, so a tested uPVC set and a tested composite set have passed the same test, and an untested door of either material has passed nothing. Ask for the PAS 24 test evidence and the cylinder specification whichever material you choose, and make sure the frame is fixed and packed properly into the opening.
In England, 1.4 W/m²K. Approved Document L Table 4.2 sets that as the limit for new and replacement doors in existing homes, and a Doorset Energy Rating of band B is accepted instead, or band C where more than 60 per cent of the internal face of the door is glazed. The door also has to be draught-proofed. The limit applies whichever material you choose, so treat it as a figure to check on the quote rather than a reason to pick one material, and ask for the U-value or the Doorset Energy Rating in writing. The 2026 edition of Approved Document L takes effect on 24 March 2027 and keeps the same 1.4 figure for doors. Wales, Scotland and Northern Ireland have their own building regulations.
Often, yes, and it costs far less than a new door. Our composite door guide puts a full respray at about £280, against £1,000 to £2,500 to replace a composite door supplied and fitted, so it is worth doing for a door that is sound but scratched or faded. Those figures are for composite doors, and we do not hold a guide price for respraying uPVC. It is not a fix for everything either. A bowed slab, a frame that has dropped and a failed glazed unit are all replacement jobs, and no respray will stop a door letting draughts through.
Price it as a uPVC job, or look past both materials. Composite is mostly sold as a single front or back door, so for a wide glazed opening the real comparison is uPVC against aluminium or hardwood. Our uPVC guide prices French doors at £1,100 to £1,800 and sliding patio doors at £1,300 to £2,200 supplied and fitted, and our French doors guide puts aluminium sets at £1,800 to £3,000 and hardwood at £2,500 to £4,000. If you want composite at the front with a sidelight next to it, the side panel adds £250 to £450, taking the door and panel to £1,500 to £2,200 fitted.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.