Buy Now - PAY in 2025!

Monthly Experience Prize Draw! - How to play

Three counties - bay and bow windows - choosing the right widows Three Counties Primary Logo

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.

Join Our Newsletter

Sign up to our newsletters and receive useful hints and tips, plus much more, including competitions and special offers.

David Bryant
David Bryant
Very happy with our new door . The support team kept us up to date on everything and the guys on the installation team were early , friendly and professional. Great value all round
Kate Hulbert
Kate Hulbert
Was looking for a new front door, to replace our tragically 80's monstrosity. The Three Counties website was great as i could see and design the door i wanted and then get a quote for it. The sales team was really quick to respond, and not at all pushy. A survey was easily arranged, to confirm sizes etc and the installer turned up precisely on time, was super friendly, efficient, neat and very tidy. Whole process took about 4 weeks, beginning to end, and I now have the door of my dreams! The only downside is my neighbors keep pestering me for details of who did the job. No hesitation in recommending Three Counties.
Nikki Wade
Nikki Wade
I'm very happy with my new conservatory - Mark and David did a brilliant job of the build and resolved any issues I had to make sure everything was finished to a really high standard.
Dominic Blood
Dominic Blood
This is the second time I have used Three Counties , a few years later and in a different house this time. It’s great to see the quality of the windows and workmanship have remained 5*. A stress free installation from start to finish, all windows installed have transformed how our 70s style house looks and now no worries of mould as a result of the old timber framed windows. The Installers who completed our job were amazing, and I mean amazing! Hard working, extremely skilful at their trade, polite and very tidy. Each day when they left they hovered up and left the place in the best condition they could. The whole process from the initial quote , measurements and dealing with the office team before and after the installation has been a true pleasure , if only all businesses were as efficient as this. Highly recommended for anyone considering new windows or any other products they provide and I won’t hesitate to use them again. Thank you Three counties!
Kim Stevens
Kim Stevens
I shopped around and three counties came in at the most reasonably priced, and I used the buy now pay later option. Really happy with my new door and window, which were both fitted in one afternoon. The customer service was very good throughout and everything went smoothly.
I had some windows fitted a few years ago and have recently had a problem with one of the locking mechanism failing. I called 3 Counties, who had a base call out charge, where a lovely lady took my details, refered to my file and we agreed a date when the fitter would come out and inspect the issue. Paul arrived bang on time and was very helpful. He checked the window, confirmsd the issue and promptly fixed it there and then with a replacement part he had on board his van. He was polite and knowledgable. Very efficient. Thank you 3 Counties.
samie dowling
samie dowling
I had new windows fitted and they look amazing, make such a difference. House is much warmer and soundproof! Staff were very professional, done the job so quickly and cleaned up after. Would definitely recommend.
Ywain Martin
Ywain Martin
Excellent service throughout the process. Very happy
Victoria Stone
Victoria Stone
Very happy with our new windows. Fitters were respectful and tidy. From start to finish. Thanks again.