The Window Installation Process: What to Expect
Replacing your windows is a big improvement, but if you have never been through it before, the unknown can be daunting. How long will it take? Will your home be left exposed? What do you need to do to prepare? Understanding the window installation process from start to finish takes the worry out of it and helps everything run smoothly. Here is exactly what to expect, step by step.
Step 1: The home survey
Every good window installation process begins with a proper survey, not just a quick look. A surveyor visits your home, measures each opening precisely, checks the condition of the existing frames and surrounding brickwork, and discusses your choices on style, colour, glazing, and hardware. Accurate measurements matter enormously, because windows are made to order for your exact openings. This visit is also your chance to ask questions and confirm the specification before anything is manufactured.
Step 2: Manufacturing lead time
Once measured and ordered, your windows are made to your specification. This typically takes a few weeks depending on the product and the time of year. Because they are bespoke, there is a genuine lead time here, so factor it into your plans. A reputable installer keeps you informed and gives you an installation date once the windows are ready.
Step 3: Preparing your home before the fitters arrive
There are a few simple things you can do to help the window installation process go smoothly:
- Clear the area around each window, inside and out, so the fitters have room to work
- Take down curtains, blinds, and window dressings in advance
- Move furniture, ornaments, and anything fragile away from the windows
- Make sure the fitters can access the outside of each window, trimming back plants if needed
- Keep pets safely out of the way, as doors will be opening and closing
Your installer should tell you what they need beforehand, but a little preparation makes the day far easier for everyone.
Step 4: Removing the old windows
On installation day, the fitters remove your old windows one at a time. This is done methodically so your home is never left widely exposed – typically one window is removed and its replacement fitted before moving to the next. The old frames and glass are taken out carefully to limit mess and damage to surrounding surfaces. Good fitters use dust sheets and protect your floors and furnishings as they work.
Step 5: Fitting the new windows
Each new window is positioned in the opening, checked for level and square, and secured firmly. The fitters then seal around the frame, inside and out, to make it weathertight and draught-free – a crucial step in the Scottish climate. The window is adjusted so it opens, closes, and locks smoothly. This part of the window installation process is where quality of workmanship really shows, because a perfectly made window fitted poorly will never perform as it should.
Step 6: Finishing and making good
Once the windows are in, the fitters make good around them – tidying the internal and external finish, applying trims or sills where needed, and cleaning up. A professional team leaves your home clean, takes away all the old windows and packaging, and does not leave you with a mess to sort out.
Step 7: The handover
Before they leave, the fitters walk you through your new windows – how to operate the locks and any tilt or turn functions, how to clean them, and what the guarantee covers. You should receive your paperwork including the guarantee and, where relevant, building standards compliance documentation. Keep this safe, as you will need it if you ever sell the property.
How long does window installation take?
For a typical home, a full set of windows is usually fitted in one to three days depending on how many there are and the complexity of the job. Individual windows often take only an hour or two each. Your installer will give you a realistic timescale when they confirm the date.
Ready to replace your windows?
A smooth window installation process starts with choosing an installer who surveys properly, communicates clearly, and fits to a high standard. NuView installs windows across Glasgow, Stirling, and Central Scotland, with free no-obligation surveys and a professional fitting team. Explore our uPVC windows in Glasgow or uPVC windows in Stirling, or contact us to book a survey.
Frequently asked questions
How long does it take to install windows in a whole house?
For a typical home, a full set of windows is usually fitted in one to three days, depending on the number of windows and the complexity of the job. Individual windows often take only an hour or two each. Your installer will give you a realistic timescale when confirming your installation date.
Will my house be left exposed during installation?
No. Windows are removed and replaced one at a time, so your home is never left widely open. A fitter typically takes out one old window and installs its replacement before moving on to the next, keeping your home secure throughout the day.
What do I need to do to prepare for window installation?
Clear the area around each window inside and out, take down curtains and blinds, move furniture and fragile items away, ensure the fitters can access the outside of each window, and keep pets out of the way. Your installer will confirm anything specific they need beforehand.
Do I need to be home during window installation?
It is best to be home at the start so the fitters can confirm access and details, and at the end for the handover. You do not necessarily need to be present every moment in between, but being contactable is sensible in case any questions come up during the day.
What paperwork should I receive after window installation?
You should receive your product and installation guarantee and, where relevant, building standards compliance documentation. Keep this paperwork safe, as you will need it if you ever sell your property. Your installer should walk you through it during the handover.
