Guide · 28 June 2026
Aluminium or uPVC windows: which is right for your home?
Aluminium and uPVC are two of the most common window frame materials, and they suit different homes and budgets. Neither is simply better than the other. Here is how they compare on the things that matter, so you can decide what fits your home.
Looks and sightlines
Aluminium is strong, so the frames can be slim while holding large panes of glass. That gives more daylight and a sharper, more contemporary look, which is why aluminium suits modern builds, extensions and homes going for a clean, minimal style.
uPVC frames are bulkier and the look is more traditional. For many homes that is perfectly fine, but if you want the glass to do the talking, aluminium keeps the frames out of the way.
Strength and lifespan
Aluminium is a durable metal that holds its shape and finish for years, which is part of why it tends to last well. The powder-coated finish keeps its colour with very little upkeep.
uPVC has come a long way and quality units perform well, but it is a softer material and can look tired sooner, particularly in bright, exposed spots. As a rough guide, aluminium is the longer-term choice, and the price reflects that.
Warmth and insulation
Both can be well insulated. Modern aluminium windows are thermally broken, which means a barrier inside the frame stops the cold transferring through the metal, so they perform well for warmth. With good double or triple glazing, either material can keep a room comfortable.
The glazing and the quality of the fit often make more difference to comfort than the frame material alone.
Cost and upkeep
uPVC is usually the cheaper option up front, which is a genuine advantage if the budget is tight or you are doing a lot of windows at once. Aluminium costs more but repays it in looks, strength and a longer life with less to worry about.
We fit aluminium and Aluclad systems because they suit the Irish climate and hold up over time, and we are happy to give you honest advice on what makes sense for your home and budget.
Questions
Common questions.
Aluminium offers slimmer frames, more glass, a sharper look and a longer life, while uPVC is usually cheaper up front. Neither is simply better; the right choice depends on your home, your style and your budget.
Modern aluminium windows are thermally broken, with a barrier inside the frame that stops the cold transferring through the metal. With good glazing they keep rooms comfortable through the Irish winter.
Aluminium generally lasts longer and holds its finish with very little upkeep, which is part of why it costs more up front. Quality uPVC performs well but tends to look tired sooner.
More advice
Double glazing or triple glazing: which suits your home?
When the extra pane is worth it, when it isn't, and how to weigh warmth, noise and budget for an Irish home.
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How much do new windows cost in Ireland?
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