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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.

Colin Drumm
Colin Drumm
We used Three Counties to replace our front door and porch. Throughout the process, from design, quote, survey and installation the service and level of communication has been fantastic from all involved. The installation team were great, friendly and courteous, working cleanly and tidying up after themselves. We would have no hesitation using Three Counties again, or recommending their services.
Clare Rogers
Clare Rogers
Fantastic service from start to finish. Kept me upto date all the way through the process. Very prompt coming out to measure up and discussing what windows I would like. The install was done professionally by a fab team (James and Josh), cleaned and tidied as they went, friendly team. Would highly recommend
Donata Noad
Donata Noad
Very happy with Three Counties. That’s the second time we have ordered services from this company and both times it was flawless. Prices are very competitive, customer service very good and workmanship excellent. I trust this company 100% and will be definitely be using them in the future. Paul, gentleman who fitted the door, done an amazing job. There is nothing there that person like myself (with slight touch of OCD) would have an issue with. Highly recommended local company that you can trust.
Steve Colvin
Steve Colvin
We replaced all windows and doors with 3-Counties. Efficient and tidy, the workmanship is great. Very happy with experience of using them and wouldn’t hesitate to recommend them
Paul Thompson
Paul Thompson
We used Three Counties to replace 7 windows at our property in February 2022. From the initial quotation, through survey to installation I was extremely impressed with them. The installation was completed by Dan and Cam who I cannot praise highly enough. Their workmanship and attention to detail / finishing was exemplary. They were polite and worked hard / efficiently to complete the job in 1.5 days. They took great care to protect carpets and furnishings whilst working and spent time tidying up, leaving the property very clean. I would not hesitate in strongly recommending this company.
Ryan Wel
Ryan Wel
Professional installation by the team including brickwork and windows will definitely be using again for other windows at the property
Excellent service all round from Three Counties. I fully recommend this company, the fitters Ron and Liam were brilliant, thorough, polite, continually clearing everything away, very tidy, helpful, punctual and never wasted time. The windows and doors are great, one very happy customer.
John White
John White
The quote was the price (no hidden extras).The quality of the doors we purchased and the fitting of them was top notch It is nice to find a company that keeps you informed as regards fitting etc at all times We had a problem through no fault of 3 counties and they sorted it efficiently and effectively.We were kept up to date at all times. I have no hesitation in recommending them to anybody thinking of any form of double glazing. This revue would not be complete without a big thankyou to Kate and the fitters.
Tim Padday
Tim Padday
We are so pleased with our new bi-fold doors supplied and fitted by Three Counties. The job was done professionally and in the time frame provided. Dan and Cam took the upmost care on installation to ensure everything was perfect and they were a pleasure to deal with. Credit to the administration team also who kept us fully informed of the process and schedule. I would highly recommend Three Counties for their workmanship and already have to our friends, who have employed them to do their conservatory