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When is the Best Time of Year to Replace Windows?


Most people will put off shelling out for new windows for as long as they can, despite the fact that they are probably wasting energy and money if the windows are single glazed, leaking or drafty. Sooner or later, the day will come when they have no choice but to invest in replacement windows, but the next question is a big one: when is the best time of year to get windows replaced?

There’s no right or wrong answer as windows can be installed at any time of year, but there are certainly some seasonal pros and cons to consider which we have outlined here.

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Window replacement in spring or summer

The most popular time to have windows replaced is late spring, summer and early autumn when the weather is generally warmer. Advantages of installing windows in warm weather include:

  • You won’t be letting a lot of cold air into your home during the installation. This is a particular worry if you’re having lots of windows replaced and the job will take a while.
  • Installations in warm and dry weather tend to be faster.
  • In addition, the caulk which the installer uses to install the windows will be more effective in warmer weather. Latex caulk needs to be used at temperatures between 4-26°C, but silicone can be used in colder temperatures if it is warmed before application.
  • There is also the issue of the window frame material (e.g. aluminium or uPVC) expanding and contracting as the temperatures rise and fall. If windows are fitted in cold weather and then expand in the summer, the caulk may crack.
  • However, there are also some potential downsides to replacing windows in warmer weather.

  • If temperatures are too hot, i.e. above 26°C, the caulk won’t set properly. Humidity can also cause problems.
  • Windows also insulate your home from heat as well as cold, so if your installation takes place during particularly hot temperatures you may find it harder to cool your home than you would to warm it.
  • Warm weather can also bring heavy rain which will delay or at least complicate the installation.
  • It is typically harder to book an installer during the busy summer period and you may have to pay slightly more.

No matter what time of year it is, you can great deals on replacement windows by comparing multiple quotes. Get in touch today and we’ll find you up to 3 free no-obligation window quotes from installers near you.

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Window replacement in autumn or winter

Why would anyone get their windows replaced during the cold weather of late autumn and winter? Well, while it might seem an unusual choice, there are some advantages to braving the cold.

  • The colder seasons are usually much quieter for window installers which can mean you can find more competitive prices and greater availability so you can book an installation to suit your schedule.
  • Early autumn can be a great time to book a window installation as the weather is still relatively warm but many people are taking holidays and/or have the kids at home so are not keen to carry out home repairs.
  • While latex caulk is best applied in warm weather, silicone or rubber caulk can be applied in temperatures as low as -20°C and is better at weatherproofing the windows. Be sure to check with your installer that they have taken the temperature into account when fitting your windows.
  • Professional window installers will know how to minimize any discomfort during a winter installation and will work as quickly as possible as a result. For example:
  • They will often replace one window at a time to prevent your home becoming a wind tunnel.
  • They may also cover the openings with large sheets of plastic to reduce drafts.
  • When windows are being installed in a particular room, keeping the door to that room closed or hanging a heavy blanket will minimize the impact on the rest of the house.

How to Prepare for Window Installation Day

To ensure the installation of your new windows goes as smoothly as it can, there are some steps you can take to prepare your home before the installer even arrives.

  • If there are shrubs, bushes or tree branches which could be an obstacle for the installer, cut them back as much as possible.
  • Clean area around the window as when dust or pollen gets mixed in with caulk it can cause issues in the summer heat.
  • Find old bedsheets, drop cloths or plastic sheeting and cover your furniture and flooring to protect your home from paint, debris and dust.
  • Take down curtains, blinds and any other accessories.
  • Move furniture away from the windows but be sure to leave a clear walkway for the installer to get in and out of your home easily and safely.
  • Deactivate any security sensors you have connected to windows.
  • Keep your pets in a secure area away from where the windows are being installed.

Get free window replacement quotes

We know that getting a high-quality installation service at the best possible price for your new windows is your priority, which is why we recommend comparing multiple quotes.

To make sourcing those quotes easier, complete our simple online form and you’ll soon be contacted by up to 3 window installers based in your local area. Once you’ve received the quotes, you can compare their prices and go for the best one. Or not, there’s no-obligation whatsoever.

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