So, How Long Does It Take to Install New Windows in a House?
Replacing windows is one of the most common home improvements, but many homeowners are unsure how long the process actually takes. The time needed to install new windows in a house depends on several factors, including the number of windows, the type of property, and the style of windows being fitted. Understanding the typical timeline helps homeowners plan properly and reduces uncertainty before work begins.
We explain how long window installation usually takes, what affects the schedule, and what homeowners can expect before, during, and after the work.
Typical Timeframe for Installing New Windows
For most homes, installing new windows takes between one and three days. A small house or flat with standard sized windows can often be completed in a single day. Larger properties or homes with more complex designs usually take longer.
As a general guide, installers can fit around eight to twelve standard windows per day. This varies depending on access, window size, and the condition of the existing frames.
Factors That Affect Installation Time
Several key factors influence how long it takes to install new windows in a house.
Number of Windows
The more windows being replaced, the longer the installation will take. A full house replacement naturally requires more time than changing just a few windows.
Property Size and Layout
Larger homes with multiple floors take longer than smaller properties. Access to upper floors, restricted spaces, or unusual layouts can slow down the process.
Window Style
Different window styles require different installation methods. Simple designs such as casement windows are usually quicker to install than more complex designs. Homes with bay windows often require extra care and time because of their size and structure.
Traditional properties with sash windows may also take longer, especially if the openings need adjustment to ensure a proper fit. Homes that choose flush windows may need additional preparation to achieve the correct finish.
Condition of Existing Windows
If the existing frames are in poor condition, extra work may be required. Rotting timber, damaged brickwork, or uneven openings can add time to the installation. Removing older windows may also take longer if they have been painted shut or altered over time.
Custom or Made to Measure Windows
Custom sized or specialist windows often require more careful fitting. While the manufacturing lead time is separate from installation, the fitting process itself can take longer to ensure accuracy and performance.
What Happens Before Installation Begins
Before installation day, the installer will measure all window openings. This ensures the new windows are made to fit the property correctly. Accurate measurements help avoid delays during fitting.
Homeowners are usually advised to clear areas around windows inside the home. Moving furniture, curtains, and blinds allows installers to work efficiently and reduces the risk of damage.
What to Expect on Installation Day
On the day of installation, the team will arrive with the new windows and equipment. Each window is usually replaced one at a time to keep the home secure.
The process for each window typically includes:
- Removing the old window
- Preparing the opening
- Installing the new frame
- Securing and sealing the window
- Checking alignment and operation
Once fitted, the area is cleaned before moving on to the next window. Noise and dust are expected, but experienced installers work efficiently to keep disruption to a minimum.
How Long Each Window Takes
On average, a standard window takes around forty five minutes to one hour to install. Larger or more complex windows may take longer.
Bay windows, for example, often take several hours because they involve multiple sections and structural considerations. Sash windows may also take longer due to their design and the need for careful alignment.
Installation Time for Different Property Types
Flats and Apartments
Flats usually take less time because they have fewer windows. Many flat installations can be completed in a single day, provided access is straightforward.
Terraced Houses
Terraced houses often take one to two days, depending on the number of windows and whether bay windows are included.
Semi Detached and Detached Houses
Larger homes typically require two to three days. Properties with extensions or additional glazing may take longer.
Internal and External Finishing
After the windows are fitted, finishing work is completed. This includes sealing around the frames and tidying internal and external edges. Minor touch ups may be needed, especially in older homes.
Internal finishing is usually completed on the same day, but in some cases decorative work such as repainting may be left for the homeowner to complete later.
Doors and Larger Glazed Units
If the project includes doors as well as windows, this can affect the timeline. Larger glazed systems take longer to install than standard windows.
Homes with modern layouts often include aluminium systems such as aluminium patio sliding doors or aluminium bifold doors. These installations require careful handling and precise alignment, which can add time to the project.
Single entrance doors, including external aluminium doors, usually take a few hours to fit.
Weather and Installation Time
Weather conditions can influence installation speed. Heavy rain or strong winds may slow progress, especially when fitting upper floor windows. Professional installers plan around weather where possible, but delays can sometimes occur for safety reasons.
Compliance and Certification
All replacement windows must meet building regulations. Using a registered installer means the work can be certified without involving building control directly. Many homeowners confirm installer status using the FENSA installer checker.
Energy performance is explained through the BFRC, which helps homeowners understand window efficiency ratings. Guidance on building compliance is also available from LABC.
After Installation Is Complete
Once installation is finished, the installer will check that all windows open and close correctly. Locks, handles, and vents are tested to ensure they function properly.
Homeowners are usually given care advice for their new windows. Keeping frames clean and checking seals occasionally helps maintain performance and appearance.
How to Reduce Installation Time
There are a few ways homeowners can help the installation run smoothly.
- Clear access to windows before installation day
- Remove curtains and blinds in advance
- Ensure pets and children are kept away from work areas
- Discuss access and parking with the installer beforehand
Good preparation helps avoid unnecessary delays.
Is It Worth Replacing All Windows at Once?
Many homeowners choose to replace all windows at the same time. This often reduces overall disruption and ensures consistent appearance and performance across the home.
Replacing windows in stages can spread the cost but may lead to repeated disruption and longer overall installation time.
Conclusion
Installing new windows in a house usually takes between one and three days, depending on the size of the property, the number of windows, and the styles chosen. Standard homes can often be completed quickly, while larger or more complex projects take longer. Understanding the process helps homeowners plan effectively and reduces disruption. If you would like advice or want to discuss a window installation project, you can contact us here, and our team at Skyway Windows LTD will be happy to help.
