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How to Replace a uPVC Window
If you're installing new glass units in your uPVC windows, this guide will show you everything you need to know including the tools you'll need and step-by-step instructions. Replacing the whole window, including the frame, is a regulated job that requires building control approval.
Table of Contents
What Tools Do I Need to Replace a uPVC Window?
Below is a list of tools you will need for replacing a uPVC window:
- Stanley scraper knife
- Flathead screwdriver
- Spirit level
- Silicone sealant
- Caulking gun
What Safety Equipment Do I Need to Replace a uPVC Window?
Although you don't need any specific safety equipment when replacing uPVC windows and doors, protective gloves and safety goggles are recommended. It is also good to have someone on hand who can help you remove the glass and lift the new glass into place, especially on larger windows.
What Materials Do I Need to Remove and Replace a uPVC Window?
The list below highlights the materials that you will need to replace the glass in a uPVC window using the steps below:
- A new double-glazed unit, made to fit your frame.
- Beading.
- Spacers.
How to Prepare for a uPVC Window Replacement
When preparing to replace a uPVC window, first of all, make sure the new window is correct. It should be measured accurately and be suitable for your current fittings.
However, if you are also removing the existing frame, the job becomes a full window replacement, which needs building regulations approval in England and Wales. You can apply for this yourself before installing the new window, or hire a window fitter who is registered with a competent person scheme (FENSA, CERTASS, Certsure, NAPIT, Blue Flame Certification or ASSURE) who can sign it off themselves.
How to Replace the Glass in a uPVC Window Yourself
The following step-by-step guide will explain the process of removing the glass from a window as a DIY project and fitting a new glass unit into the existing frame. If you require professional help, then hire an experienced local window fitter.
Step 1
Insert your Stanley scraper knife in the gap between the frame and the beading.
Step 2
Push the scraper and pry the beading away from the frame. Continue this all the way down the frame until you can pull the beading out by hand.
Step 3
Remember where the beading goes and put it on the floor in the direction that you took it off so that you know which way it goes back in again.
Step 4
Continue this step for the other sides and then do the same at the bottom. Leave the top bead for now as this will be holding the glass, although as there is a risk of the glass breaking you should be wearing your gloves and eye protection.
Step 5
You should then be able to push the glass out easily at the bottom and pull it out completely.
Step 6
When you come to fit your new glass, ensure that the spacers are still in place as they were when you removed the old glass.
Step 7
To fit the new glass, slide it into position in the opposite direction you did when you removed the old glass. It should fit neatly into place as long as you have got the measurements right.
Step 8
You will then need to re-fit the beading around all of the edges carefully and push it fully into place.
FAQs
How Long Does It Take to Replace a uPVC Window?
On average, a DIY window replacement with easy access can be completed within a couple of hours. If you are also removing the frame, then this will need 3 to 4 hours, or potentially longer if you don't have any previous experience. The time required for larger or bespoke windows will vary depending on the individual scenario.
How Do You Clean uPVC Windows?
First you should open the window and remove any build-up of dirt within the alcoves. You can then use a bucket of warm soapy water and a soft cloth to clean the actual windows, remove any excess water and dry them off using a clean cloth. Avoid using any harsh chemicals, and if you need to use a scraper then try on a small area first to avoid scratching the glass.
What Is a uPVC Window Sill?
The uPVC window sill runs underneath the window frame and acts to deflect rainwater away from the brickwork underneath the window.
Can You Get Different Coloured uPVC Windows?
Yes, you can. While uPVC windows are usually white, you can get different colours to suit your taste and fit in with your home's aesthetic.
Can You Paint uPVC Window Frames?
You can, although it isn't recommended. The paint will usually not look great on uPVC and will be difficult to maintain. If you are looking to change the colour of your uPVC windows, it is recommended that you replace them with new uPVC window frames in your desired colour.
