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Updated by KJN Home Improvement on Oct 26, 2015
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A Guide to Replacing Your Windows

Installing new windows in your home can be a very big investment, so it’s important you get windows that will be long lasting, high performing and in a style to best suit the property. If your windows prove difficult to open and close or clean, or you have single-pane windows which do not provide sufficient insulation, it may be time to consider replacing them. Here are the top things to consider when replacing your windows:


Energy efficiency and performance

Energy efficiency and performance

The older your windows are, the less energy efficient they're likely to be. Energy efficiency will also be influenced by your climate and the design of your property. Checking the energy performance rating of your home, and consumer reports of tested types of windows for different climates, will help you choose the type of windows which will improve energy efficiency in your home.


Upgrading your panes

Installing double or even triple glazed windows, will increase insulation and therefore make you warmer and save you money on your energy bills. Double glazing also reduces noise from the outside. You can opt for fillers in between the panes such as gas, which will further retain heat and keep the cold out.


Is your property listed?

If you live in a listed property or in conservation areas, you'll most probably need permission from your local council authority in order to replace your windows. Usually these will need to be in keeping with the appearance of the building or surrounding area. If you have original wooden sash windows for instance, you may be able to upgrade them with double glazed, uPVC framed windows in a wood effect, which would complement the style of your property whilst still being high performing and value adding.


Choose a style

Choose a style

There are many styles available to suit your property and requirements; casement windows are a popular choice and open by swinging out. Other styles include single or double hung windows, which slide vertically to open and close. Awning windows are hinged at the top and tilt out and gliding windows open by sliding horizontally.


Pick your window frame

Window frames come in three main materials, wood, metal and uPVC. Wooden frames look attractive and are suited to period properties, however they require frequent maintenance. Metal and uPVC windows require less maintenance and are high performing. uPVC windows are the most versatile type, and can come in a range of colours and designs for practicality and style.



Keep costs down by upgrading only with features that will add value for you and your home. Getting low-E coatings on your windows will increase effectiveness and efficiency, and windows that tilt for example will better facilitate cleaning.


Choosing your installer

Choosing your installer

You must ensure that your new windows comply with building regulations, so that you know they’ve been installed properly and safely. See that your installer is registered with an approved body or competent-person scheme, and that they can provide you with a certificate on completion, which you should keep for when you decide to sell.