Composite or uPVC: The Honest Comparison
Composite doors cost roughly twice what a uPVC door costs. Whether that is worth paying depends almost entirely on which way your door faces.
What They Are Made Of
A uPVC door is a hollow plastic frame with a foam or hollow slab infill and steel reinforcement inside the sections. A composite door has a solid timber or foam core, a glass-reinforced plastic skin, and a considerably heavier feel when you swing it.
That weight is most of what people are actually paying for. A composite door closes with a solid noise and does not flex when you lean on it, and those two things do more for the perceived quality of a house than any spec sheet.
Warping, Fading and the South Elevation
uPVC in white is stable. uPVC in a dark woodgrain foil on a south-facing door picks up serious heat, and the older generation of those doors bowed badly. Modern sections are better but the physics has not changed.
Composite skins handle heat far better and hold colour longer. If your front door faces south or west and you want anything darker than cream, that alone settles the argument.
Where uPVC Still Wins
A sheltered north-facing door in a porch is not a demanding location, and spending composite money on it is spending money for no return. Back doors and side gates likewise.
Security is a wash. Both are only as good as the multipoint lock, the cylinder and the fit of the frame, and a cheap cylinder in an expensive door is the weak point every time.
