Frames
uPVC
uPVC, or unplasticised polyvinyl chloride, is a rigid plastic extruded into window and door frames, usually with steel reinforcement in the chambers. It is common on upper-floor windows, rear doors and offices, but rarely used for a full street-level shopfront because of its wider sections.
Where does it work well?
Upper-floor windows above a shop, rear doors, flats above commercial units and office windows, where thermal performance and low cost matter more than slim sightlines or a heavy-duty retail entrance.
Pros
- Lower cost
- Good insulation
- No repainting needed
Cons
- Wider sections than aluminium
- Less suited to heavy shop door use
- Often unsuitable on listed buildings and in conservation areas
How long does it last?
Typically a couple of decades or more, with hinges, gaskets and locks needing attention sooner.
What should you check when buying?
Check that the profile is reinforced for the opening size and that doors get a multi-point lock suited to commercial use. If doors or windows need to meet PAS 24, ask for evidence. In a conservation area, check with the planning team before ordering.
Common questions
Can a shopfront be made from uPVC?
It can, but it is rare at street level. uPVC sections are wider and less rigid than metal, so they struggle with large panes and heavy daily door use. It suits upper floors and rear windows better.
Can uPVC be repainted?
Yes, specialist coatings can change its colour, but preparation matters and a poor job will peel. Many owners choose a foil-wrapped profile from new instead, as foils come in common colours and timber effects.