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5 Things You Should Know Before Replacing Your Windows

(4 min read)

Replacing the windows in your home can make a big difference, whether it’s for aesthetic reasons, to lower energy bills, or for security. However, there are several factors that affect whether you go through with the work. This post looks at what to consider before taking the plunge and answers some frequently asked questions regarding replacement windows. Hopefully, this will relieve some of the stress that comes with home improvements.

Does Moisture Mean I Need to Replace My Windows?

If you have noticed moisture building up on the inside the panes of glass of your windows, this is a sign that your windows are beginning to fail. A small amount is usually fine, but a lot of condensation and the possible development of mould is a reason to be concerned. Moisture will usually show in the form of condensation on the internal panes or as fogging between the panes.
Before deciding to replace these windows, you can try a few ways to see whether the moisture can be combatted in another way:

  • Try using a dehumidifier to remove excess moisture from the air
  • Try ventilating rooms which tend to steam up more thoroughly
  • Try raising blinds to allow air to better circulate
  • If none of these methods makes a difference then it is likely time to replace your windows.

Should I Replace All My Windows at Once?

This point is mostly up to you. It depends a lot on your budget; if you can afford to replace all of the windows at once (or are able to keep up with finance options if you choose this route) then this might work for you. However, replacing one or two windows at a time is also perfectly fine. There is absolutely no pressure to carry out more work than you would like to, so feel free to replace your windows in as many stages as necessary.

How Do I Choose the Right Windows for My Home?

This step may take the longest. There are many things to consider: budget, material, style, colour, furniture, security features. Each option can be chosen to match any existing doors and windows – or you might choose a completely new style to entirely revamp the home. Check out some colour options here.


The main materials to choose from would be aluminium or uPVC. Each has its advantages and disadvantages, but these are easy to research and weigh up. Neither material will warp or rot and both are easy to clean.
Insulation – Both aluminium and uPVC windows offer excellent insulation.


Your budget will be one of the main factors in selecting your replacement windows. The initial outlay for aluminium windows is always more expensive than uPVC. However, over time, aluminium can prove cost-effective as it’s a more robust material than uPVC. Get an instant quote here.


The material you choose will impact the colour choice: uPVC windows allow for a wider range of colours than aluminium ones, so this may sway you to pick uPVC over aluminium.


Providing you select styles with the ‘Secured By Design’ seal of approval, you can rest assured that either aluminium or uPVC windows will offer effective security. This is a British manufacturing status accredited by the Police and Home Office to minimise the risk of unwanted entry by using robust design practices.


The overall style of a property and its surroundings impact greatly on the style of windows you’ll choose. An older property, maybe a listed building, would require a very different style from a modern, urban property. For example, a modern house or apartment might suit slim aluminium frames, while a cottage-style building might look better with sash windows.
Weighing up these options will be a crucial step in deciding. It’s always a good idea to look at all the options before deciding so try to allow plenty of time to look around and ask family, friends and neighbours about their windows.

When Is the Best Time to Install Replacement Windows?

While you usually feel the effects of failed windows more in the winter, it might be a good idea to wait until late spring for installation. Replacing a window generally doesn’t take very long but having an open cavity in the wall during winter can dramatically lower the temperature in your home for a while. If this won’t be an issue for you, windows can and will still be installed during the winter and will also give you great benefits for the remainder of winter, lasting into the warmer parts of the year.

How Can I Prepare for the Installation of Replacement Windows?

Once you have a date for your installation, you won’t usually need to prepare too far in advance. The main thing is making sure any blinds and curtains are removed from openings to allow for proper access. Creating space in front of the windows is also a must so that windows can be carried in and out without difficulty or damage to surrounding furniture. This can all usually be done the day before or the day of installation if no outside assistance is needed.

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Paul Wallis
Paul Wallis
We recently decided to replace our front door, and could not be happier with the result! Thanks so much to Kate, for her time and understanding. Cannot say enough good things about the installation, and Cameron was tidy and efficient. It's been a pleasure to work with Three Counties recently, doors and windows. Many thanks!
Danielle Horsley
Danielle Horsley
Lovely looking door
Agatha W
Agatha W
Three Counties have been superb, their customer service is great and their workman were polite, cleaned up after themselves and the workmanship is excellent!! I am very pleased with their work and would happily recommend them.
Tom Winter
Tom Winter
Excellent service!! We had 21 windows and 3 doors installed and very happy with it all. The process from start to finish was stress free and Ron and Lee who installed the windows and doors were great. Would definitely recommend!
Phil Redhead
Phil Redhead
Just had my tatty old windows replaced by Three Counties, and it’s been a highly professional job from start to finish. Communication from the administration team was prompt and courteous at all times, and installation ended up being much quicker than advertised projections. Installation was without issue and the lads who did the work were amenable to my requirements and did an excellent job. Very happy with the entire process. Three Counties were recommended to me by friends and I can certainly now recommend them to others.
Mark Boyce
Mark Boyce
Bought two new windows and a new front door from Three Counties, was very impressed with the attitude of all staff, who were friendly and informative. Price was good, and installation completed without a hitch - very happy with the final product, and would definitely use again.
Paul Picknett
Paul Picknett
We have just had all our windows (18) replaced, french doors (20 and side panels (2) by Three Counties. We could not be more pleased with their workmanship and the finished product. They left the property incredibly clean after each day, and this despite the messy nature of ripping out old windows and frames. We were kept informed at each stage and a minor snagging issue was resolved promptly and efficiently after installation. A first class service. We would not hesitate to recommend Three Counties.
Anna Trevelyan
Anna Trevelyan
Three Counties have now installed several windows and doors on our house and they're always my go-to company. I used another before I discovered them and they let me down, but I absolutely cannot fault Three Counties. From the moment you contact them they're courteous and professional, and they keep in touch with timescales and installation times. Friendly installers too, who go above and beyond. You'd think all this great service would cost more but they beat other companies on price. Highly recommended and trusted, I'd never go anywhere else now.