What Are uPVC Windows? All You Need to Know Before Replacement

Replacing old windows is one of the most effective ways to enhance your home’s comfort, energy efficiency, and curb appeal. That’s why modern uPVC windows have become one of the top choices for Canadian homeowners, thanks to their durability, low maintenance, and excellent insulation performance in harsh climates.

According to recent industry trends, over 60% of residential window replacements in Canada now use vinyl or uPVC window frames. But what exactly are uPVC windows, and how do they compare to other window options?

This quick guide breaks down everything you need to know about uPVC windows, including their lifespan, cost, design, and installation considerations, before signing a replacement contract.

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uPVC vs. PVC Windows – What’s the Difference?

PVC (polyvinyl chloride) is a synthetic plastic polymer, which is created chemically. Vinyl is usually made in rigid and flexible forms. In order for it to become flexible, plasticizers are added to the compound. The “U” in UPVC stands for “unplasticized”. Although they are commonly referred to as PVC windows, most vinyl windows are in fact made from UPVC. So basically uPVC windows = vinyl windows for easier reference.

UPVC is not as flexible, more weather and fire resistant, doesn’t deteriorate, warp, or discolour as fast as regular PVC. It is also not as toxic or dangerous to the environment as plasticized vinyl.

Aluminum vs. uPVC windows

Aluminum windows are another popular window replacement option offered by several big brands in Canada. But are they good for residential houses? When comparing aluminum and uPVC windows, the primary differences lie in energy performance, maintenance, and cost:

• uPVC windows are far better-insulated thanks to their multi-chambered design, making them ideal for Canada’s cold winters and hot summers.
• Aluminum windows, while sleek and modern, are more prone to heat loss unless they include a thermal break — which drives up the price.

In terms of upkeep, uPVC requires minimal maintenance and won’t corrode, while aluminum can oxidize over time in humid or coastal environments. Appearance-wise, aluminum has slimmer frames and a more industrial feel, whereas uPVC offers more traditional styles with lower upfront costs.

For most Canadian homeowners, uPVC windows offer a stronger mix of performance, affordability, and comfort, especially in residential properties.

5 Ultimate Benefits of uPVC (vinyl) Windows

Comparing vinyl window frames to other materials, such as aluminum, wood or fibreglass windows, the benefits for homeowners are endless:

1. uPVC Windows Are Cheaper

One thing that will greatly influence what kind of windows you get is the price. uPVC windows are a relatively low cost in comparison to similarly performing aluminum or wood windows. Wood frame windows are generally approximately 20%-30% more expensive than vinyl, and aluminium windows are approximately 30% more expensive than vinyl windows. They are a safe investment to increase and maintain a property’s value.

Check out Ecoline price estimator below to find your potential uPVC windows cost based on such different factors such as size, colour, glass type (double or triple) and more:

Note: uPVC windows price given is just an approximate range relevant for 2025, for a detailed quote please contact our window experts.

2. Vinyl Windows Are Easy to Maintain

One of the biggest advantages of these windows is that they require little attention. Vinyl windows can generally be cleaned with water and dish soap, and don’t require special knowledge, or unique cleaning products.

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3. uPVC Windows Last Longer

Vinyl windows are durable and do not rot, as opposed to windows made of wood. Over time, wood can warp, disintegrate, and simply fall apart. Vinyl windows have a particularly long service life and high distortion resistance. They can also be manufactured in a variety of colours. Wooden windows, on the other hand, have to be scraped and re-painted every 5 years.

If you wonder how long do uPVC windows last, the answer is clear: well-maintained vinyl windows can serve for at least 25 years.

4. Vinyl Windows Are More Energy Efficient

Window frames made of PVC score top marks when compared with aluminum or wooden windows. They have better insulation values and are able to reduce energy and heating costs. Vinyl sashes offer better performance and energy efficiency from your insulated sealed units. These windows can also accommodate grilles inside the sealed unit.

5. uPVC Windows Have Better Warranties

Usually, most manufacturers offer a 20-25-year warranty on uPVC windows. This is roughly the life expectancy of vinyl and you should expect to replace your vinyl windows around that time.

At Ecoline Windows, we offer 25 years warranty on both product and labour for all our modern uPVC windows

Can You Paint uPVC Windows?

Many homeowners ask if they can DIY paint uPVC windows to match their home’s design and exterior. The answer is yes, but there is a better way. While it’s possible to use the best paint for uPVC windows, factory-applied finishes last longer, look cleaner, and maintain your warranty.

One popular trend is black PVC windows, which add a striking contrast and elevate the design of any modern or traditional home.

But you don’t have to stop there – with Ecoline, you can choose almost any custom colour to suit your vision, from bold shades to timeless neutrals.

Choosing non-traditional colours can boost curb appeal and make your home stand out, but keep in mind that custom-coloured uPVC windows may require extra manufacturing time. Still, the result is a long-lasting finish that never needs touch-ups like old wood frames do.

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