uPVC or Aluminium Windows? How to Choose the Right One
A practical comparison of uPVC and thermally broken aluminium windows: insulation, profiles, colours, large openings, maintenance and when each makes sense.
Products
PVC (uPVC) windows and doors
uPVC profiles contain a steel reinforcement. Build depth varies by system (70, 76 or 82 mm), and glazing can be double or triple, with argon gas, Low-E or laminated glass.
What’s included
- Side-hung, tilt & turn, fixed and multi-sash
- Bathroom and utility windows
- Special shapes, including arched
- Entrance and balcony doors
- Sliding doors: lift & slide, sliding and PSK
- White, woodgrain, black (Jet Black) and anthracite; different colour inside and outside
Best for
- Apartments and private homes
- Offices and budget-conscious projects
- Renovations that need better insulation
How to choose PVC windows
Before ordering, decide four things: the profile system (build depth is 70, 76 or 82 mm depending on the system), the glazing (double or triple, with argon, Low-E or laminated), the opening type and the colour. Compare thermal and acoustic insulation only by the values in the Declaration of Performance (DoP) of the complete system, not brochures or verbal promises.
Installation matters as much as the profile: PU perimeter insulation and quality silicone sealing directly affect the real result. Read PVC or aluminium: how to choose, what affects the price and why windows sweat.
Frequently asked questions
Are uPVC windows durable?
Yes, when they come from a certified system and are installed correctly. The profile has a steel reinforcement, and our warranty is 5 years on the product (per the manufacturer) and 24 months on installation.
Which colours can I choose?
White, woodgrain, black (Jet Black) and anthracite. The window can have a different colour inside and outside.
How well do uPVC windows insulate?
It depends on the system and glazing you choose and is stated in the manufacturer’s Declaration of Performance (DoP). You can request it before ordering.
Which documents do I get with PVC windows?
At handover you receive the manufacturer’s Declaration of Performance (DoP) and CE marking, the warranty certificate, the maintenance guide and the handover protocol.
Do you remove the old windows?
Yes. Removing the existing product and cleaning the opening are part of the installation procedure, and you can request them in the quote.
Related articles
What Affects the Price of Windows and Doors?
The 8 factors that determine the price of uPVC and aluminium windows, how to compare two quotes fairly and what may not be included.
Why Do Windows Sweat? Condensation and How to Fix It
Why condensation forms on windows, what you can do right away, when the window is the cause and what to look for when replacing them.
Have a project in mind?
Tell us about your building and we’ll reply within 24 hours.