Choosing the right glass for your sash windows

triple-glazing

When it comes to sash windows many think that their options are limited, particularly if they live in a listed property or within a conservation area. This need not be the case though. Modern techniques have changed this and, as we have talked about many times before, sash windows on a period property don’t have to be made of the same materials as the period they date to, to look authentic.

This month we turn our attention to the glazing in sash windows and the different types available to homeowners. Find out what the main types are and what the pros and cons are for a fully informed choice when it comes to replacing your sash window glazing.

Double glazing

The most common type of glazing, and for good reason. Double glazing offers the following benefits:

  • Good thermal insulation so your energy bills will stay low and the heat will stay inside your home. Make sure that you have checked for gaps and draught-proofed your windows, especially if they are older, for maximum performance.
  • Good sound proofing. While not as high performing as acoustic glazing, they are the best option for most of us, doing a good job of keeping sound out without excessive cost.
  • A cost-effective option whether it is for a period property or not.
  • Peace of mind given the good security they offer.

There are a number of double-glazing options available on the market, including:

  • Standard 4mm with a 6mm gap. These are a popular choice for sash windows as they are not too heavy and work well with existing sash counterbalances.
  • Standard 4mm with an 8mm gap filled with an inert gas, such as argon. Superior to the ‘no gas’ option given their improved U-value (which means they are more energy efficient) they are also longer lasting.
  • Slim double-glazed units. These are ideal for listed buildings as they can replace older, single-glazed units to retain the period look without compromising on heat and sound insulation. They are a more expensive option, however.

Acoustic glazing

If you have particular requirements for noise insulation then this could be the option for you. The drawbacks are the weight that is added to this additional acoustic layer which could mean that you have to reinforce your sash counterbalances. It is also a much more expensive option. Unless noise insulation is of particular concern, you will probably find that double-glazing will do a good enough job at reducing noise levels.

Triple glazing

The majority of triple-glazed options involve some form of acoustic glazing. Coupled with two layers of low energy glass, the performance in reducing noise and retaining heat is striking. However, this comes with a hefty price tag which could add up to 25% more to the cost of your new sash window glazing.

Single glazing

The worst performing option in terms of sound and energy insulation. Available in standard and toughened 4mm options, the latter is a requirement for windows at ground level as they provide better security. It will also fit neatly into an older sash window frame without the need for any alterations.

If you are considering replacing your sash window glazing units and are unsure of what the best option is for you, why not get in touch with us at 1st Scenic? Call or email us on 01689 829 600 or at info@1stscenic.co.uk and we can advise you the right options for your property.

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