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Welcome to the Windows FAQ & Resources Section

Let us help you with all of your window questions and find the perfect addition to your home.

Compare & Contrast

If you’re unsure on which style or type of window you need, or what energy rating is available in what style, we’ve given you a clear explanation of the differences between them all, hoping to make your decision making much easier.

Which are most secure - uPVC, wooden or aluminium windows?

Gold handle on a White Knight uPVC window

By its nature, both double and triple glazing offers greater security due to the added strength of extra panes of glass. For windows that open, all windows come with locks that are rigorously tested to ensure they are fit for purpose. Casement, tilt and turn and sliding sash windows are Secure by Design accredited.

All of our timber windows are sustainably sourced and pressure-preserved to prevent any water ingress, rot and provide extra security. If you choose our Forest Stewardship Partnership Council redwood, it is laminated and finger-joint to make it stronger. Alternatively, hardwood is naturally resistant to shrinkage and warping.

Is triple glazing better than double glazing?

A rated double glazed window vs A++ triple glazed window

Triple glazing is better in terms of U value - less than 1.0Wh/m2.k – so less heat is escaping through your windows. The acoustic performance of triple glazing is also better than standard double glazing with the extra pane of glass providing more sound insulation.

Due to its robustness, the window is stronger, providing extra security. With its A++ window energy rating it is the best window we’ve ever made!

Although it is our best performing window for retaining heat, it can be paired up with our A+ rated double glazing to increase the energy efficiency of your home further. A+ double glazing harnesses more of the sun's energy than triple glazing - this is why we recommend pairing A++ triple glazing with our A+ double glazing.

Read more about Window Energy Ratings.

Double glazing vs triple glazing

White Knight uPVC triple glazing

Double glazing is a staple in British homes, but could you in fact benefit from triple glazing instead? Triple glazing differs from double in various areas and, depending on the room in your house or where you live, might be more beneficial. Here at Anglian, we’re experts in both double and triple glazing, but which is right for you?

Double glazing

  • Available in both A-rated and A+-rated
  • A-rated offers great all-round performance
  • A+ is the best for harvesting the sun’s free energy as it’s the perfect balance of thermal transmittance, solar factor and air leakage
  • U-value of 1.4Wh/m2.K
  • Keep out noise
  • Strong, ensuring high level of security
  • Cheaper than triple glazing
  • Available in a range of window styles and colours

Triple glazing

  • A++ rated
  • Better acoustic performance for keeping out noise
  • The extra pane means triple glazing is best for retaining heat in the home
  • Improved U-value of 0.9Wh/m2.K
  • Ideal for north-facing windows
  • Stronger, ensuring higher level of security
  • More expensive than double glazing
  • Available in a range of window styles and colours

Triple glazing isn’t always the best option, and sometimes you might be better off sticking with your current double glazing or opting for new, more energy-efficient double glazing. If you’re struggling with noise or are feeling the cold, however, then switching to triple might be a wise move as its extra pane of glass helps to retain heat and block out unwanted noise.

Learn more about triple glazing.

Secondary vs double glazing

Anglian secondary glazing

Here at Anglian, we would always recommend opting for double glazing if your property allows. However, not all buildings are able to have double glazing installed (see planning permission section) and in these cases, secondary glazing is the next best thing.

Secondary glazing is a second window fitted on the inside of your current window made from sturdy extruded aluminium alloy sections and 4mm thick glass.

Secondary glazing still provides improved heat retention, noise reduction and added security compared to single glazed windows, so if you are unable to install double or triple glazing, then secondary glazing is still an excellent option.

We are experts in secondary glazing as well as double glazing. In fact, it was the first product we sold 50 years ago, so we know what we’re talking about.

Read more about secondary glazing.

Wooden vs. UPVC window frames

White wooden sash window

While UPVC frames are the most predominant material, wooden frames continue to retain their popularity and may actually be more suited for certain properties. Whether you opt for wooden or UPVC is largely a personal preference, but if you’re unsure which to go for, here are some key details:

Wooden window frames

  • The appeal of the natural beauty of real wood
  • All wood sustainably sourced
  • Both softwood and hardwood are available
  • Softwood is laminated and finger jointed for great stability
  • Hardwood is extremely resistant to warping and shrinking
  • Wooden frames often last longer than UPVC but require a little more maintenance
  • Usually more expensive than UPVC

UPVC window frames

  • Easier to maintain and clean
  • Usually cheaper than wooden frames
  • Available in different coloured frames
  • Available in ‘Tilt and Turn’ style
  • Often slightly more energy efficient than wooden frames
  • Triple glazing only available with UPVC

For older, period properties (that aren’t listed) you may prefer the natural aesthetic of wooden frames to retain the authenticity of the house. UPVC is often the more cost-efficient choice, both in terms of initial cost and energy efficiency, which is a major reason for their popularity.

There tends to be a little more choice with UPVC in terms of the types of windows available, such as triple glazing, but wooden can lost longer if maintained properly.

Learn more about UPVC windows and wooden window frames.