Nowadays, you’d be hard-pressed to find a company offering single-glazed windows. Some listed properties require homeowners to repair windows rather than replace them in the absence of planning permission, but nowadays, modern homeowners will hunt for the best double glazing available.

When hunting for double glazing, you are likely to have more of a preference over the materials used. The materials used for the window frame can have an effect on both the appearance of the property and how well it insulates against the cold.

Frame material

What determines the best double glazing is usually the frame material. Of course, the thickness of the two panes of glass and the gas in between that insulates warm air is why makes the quality high, but what you actually have more choice over is the frame.

When it comes to double glazing, you have three main options:

  • uPVC
  • Aluminium
  • Wood


The first option, uPVC is a bit of a wonder-product for a number of reasons. The first benefit it has in its corner is the price. uPVC is by far the more affordable option, as plastic is so easy to set in comparison to sculpting wood and moulding aluminium.

The cheapest option available is white uPVC, as this has had absolutely nothing done to it in terms of colour or texture. Its next biggest benefit is its ability to stand up to multiple types of weather.

uPVC will not erode away in salty air or rot after too much rainfall, so you can ensure that you will be investing in a product that excels in longevity.


The next best option for you is likely to be aluminium. This material is, as one might expect, incredibly robust, and is particularly well-suited to larger glass panes. It can come in a wide variety of colours, but there is one other consideration to be aware of.

If you live near the seaside, then aluminium will be susceptible to erosion. While this metal is incredibly strong and hard-wearing in many other ways, sodium (sea salt) is its kryptonite. Otherwise, while aluminium is a little more expensive than uPVC, it is still quite cost-effective.


Wooden Windows

While it may seem like most properties are fitted with modern, plastic windows, there are still plenty of homeowners who would prefer an authentic wood frame.

This is completely understandable for properties with period features, as there’s often a desire to be sympathetic to the original construction.

However, it is also important to bear in mind the maintenance cost of wood. Sealing it and varnishing it to keep the water out will cost you both time and money.


Generally speaking, the best all-rounder in terms of double-glazed windows is easily uPVC. It has a number of appealing benefits, which would appeal to a much wider variety of homeowners.

It won’t erode for seaside properties, it’s cost-effective and it won’t conduct cold temperatures from the outside: three arguments in its favour that are hard to compete against.

Of course, if you don’t want traditional white uPVC windows, then it is a material that can be customised with colour and texture.