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Double Glazing Sash Window

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Before you make a decision on the type of window you need to install, you need to consider a few factors. These include cost, security, and energy efficiency. In this article, we will cover some of the characteristics of this type of window. We will also cover installation, and give you an idea of how much it will cost.

Energy efficiency

Double glazing sash windows are an excellent way to improve the energy efficiency of your home. They can help you save between PS110 and PS140 a year, and they can also add value to your property. Moreover, double glazing sashes are manufactured to measure, so they fit the frame and hole in the wall with precision.

However, double glazing sash windows require regular maintenance and repair to stay as efficient as possible. Regular inspections can help you spot any damaged areas and ensure the windows are in good working order. You should check the locks, timers, and other parts to find out if any of them needs replacing.


Sash windows are traditionally timber framed but many modern properties have them in aluminium or uPVC. If you are concerned about security, you can use a lock. However, it is important to keep in mind that most security mechanisms are not fool-proof, and some sashes can be easily opened using a knife.

Before you install a lock, make sure that the sash window is closed. Place the lock in the centre of the window. If the window is large, you may need two locks. Each lock is composed of two parts: a catch on the upper sash and a lever on the bottom sash. You should drill a pilot hole in the frame before inserting the lock.


When you replace your sash windows, the cost can add up fast. Timber sash windows, for example, are much more expensive to manufacture than their uPVC counterparts. A decent quality timber sash window can cost from PS500, and labour costs can add up to almost 30% of the total cost. You can also add internal secondary glazing, which costs PS200 to PS250 per square metre.

If you don't mind a little bit of upkeep, double glazing can improve the appearance of your home. If you have a sash window that needs replacing, you might be able to receive a grant from the local council to help cover the costs. Double glazing can also save you up to 70% of the cost of a new sash window.


A double glazing sash window has two or more panes of glass. It also has a space between the panes of glass, which can be filled with an inert gas such as Krypton. This gas acts as an insulator and prevents the metal parts of the window from rusting. It is also heavier and viscous than air, thereby reducing the rate of heat loss and condensation.

A double glazed sash window is energy-efficient and durable. It does not need any paint or varnishing, making it ideal for minimalist-styled rooms. Its smaller frame makes it less visible, and it can be made from a variety of colours, including white. It also offers increased thermal insulation, making it easier to keep a comfortable temperature inside.

Upgrading from single-glazed to double-glazed

If you're considering an upgrade from single-glazed to double-glazed glazed sash windows, there are a number of advantages to consider. These windows can reduce heat loss, help keep your home warmer, and improve your home's energy efficiency. They're also an excellent choice for period properties.

The main benefit of double-glazed sash windows is their increased energy efficiency. These windows are twice as efficient as single-glazed windows. They can be added onto existing windows without having to completely replace them. Double-glazed units also have a gas-filled space between them that helps retain heat longer. In addition, if your home is in a conservation area or listed property, you can install secondary glazing to increase the efficiency of your windows.

While single-glazed sash windows were once the most popular option, they are no longer as energy efficient as double-glazed sash windows. Besides the benefits of double-glazed windows, they are also much more acoustically efficient.


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