Closed old wooden window

Over time, windows go through a lot of wear and tear because of daily use and weather conditions. And let’s face it, most of us only think about replacing windows when it’s absolutely necessary. The good news is that replacing windows is usually straightforward and doesn’t require much effort. We know having a big hole in your house can be scary, even if it’s just for a little while. But window replacement is just a part of owning a home. No window lasts forever, and having old or damaged ones can be dangerous and costly.

So, whether you’re considering replacing your windows to make your home look better, keep it safer, or save on energy, you need to know what you’re getting into.

How Long Does It Take to Install Replacement Windows?

It usually takes 1-2 hours of your time to replace a standard window. It may take a day or two if you have a bigger project in mind, like replacing multiple custom-made windows. Skilled window installers can work wonders, with a team typically replacing around 10 to 15 windows per day. However, the whole window replacement timeline is long because your contractor will need to order the new windows and wait for a manufacturer to make or ship them. Custom windows might take even longer, mainly due to the specifics of speciality crafting. On average, the timeline can stretch from 4 to 15 weeks, depending on everything from the initial assessment to the final installation.

But remember, the exact duration can vary based on the size and specifics of your project, including the type of windows you choose and the number you need replacing.

Factors That Affect Your Window Installation Timeline

The duration of a window replacement project can vary widely, much like the British weather. It largely depends on several key factors that could extend the time from decision to enjoying your new windows. Here’s a straightforward breakdown:

The Manufacturer’s Timeliness

The journey from the window factory to your home may not always be direct. If there’s a hold-up with the manufacturer getting your windows to the installer, you might find the timeline extending more than you’d hoped. It’s a chain reaction where one delay can set the whole process back, so it’s worth considering when choosing your window provider.

Complexity of Installation

The scale of your window replacement project will determine how long you’ll wait. Replacing a single pane can be quick, but if you’re overhauling all your windows, especially larger or custom-made ones, you’ll need to brace yourself for a longer wait. More windows and complexity mean more time.

Retrofit vs Full-Frame Installation

There are two types of window replacements: retrofit installation and full-frame installation. Retrofit installation is faster and less expensive as it involves fitting the new window into the existing opening. On the other hand, full-frame installation is more involved and takes longer, as it includes replacing all parts of the window, including the surrounding materials like studs, brick moulding, and frame.

Materials used

The type of glass, window frame, and exterior siding on your home can impact your project’s length. For example, fitting wood windows might take longer than vinyl ones because they need sanding, priming, and painting. Also, the mortar between bricks needs time to dry.

Installer’s Schedule and Expertise

Who you choose to fit your windows is just as crucial as the windows themselves. An installer’s experience and how booked they are can significantly affect your project’s timeline. A reputable and skilled installer might be in high demand, so their availability could influence how soon your project starts and finishes.

Physical and Environmental Obstructions

Sometimes, it’s not just about the windows. Other things like garden plants, outdoor furniture, or even the layout inside your home can pose obstacles that need clearing before work begins.

Timing and Weather Considerations

The season can dramatically impact the speed of your installation. During the summer, many people consider home improvement makeovers, but this also means window companies are busier, and installers may have longer wait times. Winter installations can help minimise heat loss, but bad weather may lead to delays.

Understanding these factors can help you set realistic expectations for your window replacement project. Patience will be your best friend throughout this process, ensuring you achieve satisfaction and the comfort you’ve been looking forward to when the job is done.

The Window Replacement Process with H2B Windows

It’s important to understand the process from getting a quote to the installation when replacing windows. From start to finish, we’ve designed this process to be as smooth and hassle-free as possible, fitting around your life and needs. Rest assured, we’re here every step of the way to ensure your new windows are everything you hoped for.

Do your research

Firstly, it’s crucial to figure out exactly what your windows need. Is it a simple repair or time for something completely new? Our handy guide, 10 Signs You Need New Windows, is a great starting point for answering your questions.

Apply with your details

When you decide to proceed, the next step is to submit specific details about your requirements. By filling in your details and letting us know the basics, like how many windows you’re considering replacing and why, we can tailor our advice to suit your situation. This step helps us understand if you qualify for schemes like our H2B Windows Grant Scheme for fully funded windows, financing options, or even a hefty discount on your new windows.

Speak with the Team

After we receive your details, one of our team members will contact you. They will gather additional information and guide you through your personalised window installation options.

Financial Consideration and House Assessment

Once we have discussed your options and found out what you are eligible for, it’s time to consider your finances and what is feasible for your budget. Then, we will conduct a virtual or an in-person assessment of your home to confirm the specific requirements.

Window Installation

Once everything is confirmed, your installer will finalise the installation dates and provide an estimate of the installation duration. Then, they will commence the process of installing everything you need.

How Messy is Window Replacement?

Replacing windows can be messy, but preparing correctly and asking your installer the right questions can minimise the mess.

Expect a little dust

When your window installer is working, even if they are meticulous, replacing your windows will create dust and debris. This is a normal part of the process, but knowing it beforehand will help set the right expectations.

Communicate with your installer

Before starting the work, discuss the details with your installer, specifically how they plan to manage the mess. A reputable team will come prepared with dust sheets to protect your floors and should commit to tidying up at the end of each day. The goal is to minimise disruption so you can continue your day as smoothly as possible.

Prepare your home

You can also take some steps to shield your home from the chaos of installing new windows. Make sure access to the window, inside and out, is unobstructed. If the window is being installed on the second floor, clear as much space as possible outside to allow for ladders or scaffolding. Also, move furniture and decorations away from the window, remove curtains, blinds, and other window dressings, and consider using plastic wrap for your carpets.

Aftercare and clean up

At the end of the process, your installers should whisk away all the debris, leaving your home as tidy as they found it – only now, it’s sporting some sparkling new windows.


  1. How long does it take to replace a window? Installing a single standard window can take 1-2 hours. However, the total project time includes assessing your needs, ordering windows, and scheduling the installation.
  2. What factors can delay my window replacement? Delays can be caused by manufacturer hold-ups, the complexity of the installation, the installer’s schedule and expertise, physical and environmental obstacles, and timing and weather considerations.
  3. Can window replacements be done in any season? Window replacements can be done year-round, but summer and fall may have longer wait times due to higher demand. Winter can be ideal for quicker scheduling but be prepared for potential weather-related delays.
  4. What can I do to prepare my home for window replacement? You can prepare by clearing access to the window inside and out, moving furniture and decorations, removing window dressings, and covering carpets and floors to protect against dust and debris.