Double Glazing Installation Guide
So you’ve got a few quotes. You got a price you liked, from a local company with a good reputation. It’s time for installation. What happens now?

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Double Glazing on The Web knows all there is to know about double glazing installation. Our team have spent years working within the double glazing industry and have built a wealth of knowledge on all things double glazing. Let us fill you in on what to expect with our double glazing installation guide.
Window Installation
You’ve chosen the colour, the handle colour and you’ve decided to go with A-rated windows with maximum security locking systems. The next step, installation.
When the fitters arrive, they will first make sure they have safe access to the window. Don’t worry about moving heavy furniture; they will move what they have to and carefully prepare the working area for a clean and tidy installation.
You’d be surprised at what fitters have to work around from day to day, so you don’t have to worry. After they’ve checked access is OK, they will lay down their dust sheet.
All good double glazing installers will have a dust sheet, however it is a good idea for you to check before they start that there is one laid down.
If you’re having a sash window, for example, years of dust builds up in the sash box. This dust goes everywhere. If they don’t have a sheet, either ask if they can get one or give them your own if you have one from previous decorating or DIY improvements. You don’t want your furniture or floor covered in dust.
Removal of Old Windows
Assuming you are having the whole window replaced, they will double check the measurements of the new frame, then all being well; take the old one out.
The new frame is inserted into the aperture and bolted into the concrete. The fitters will check with a spirit level that everything is even, then they will move on to fit the glass sealed units.
Once the window frame is firmly installed into the brickwork, the installer will carefully place the glass sealed unit into the aperture and then proceed to gently fit the beads to enclose the glass in the frame.
They may use wedges to ensure a snug fit between the glass and internal uPVC frame however the surveyor would have ensured the glass was ordered perfectly to the size of the window.
Ensuring The Perfect Finish
Once the window has been installed, the fitter will silicone and trim from the inside and outside to give the window a perfect finish. They will use colour matched trims and sealants so that it is not noticeable where the window meets the brickwork.
It is often worth checking over the perimeter of the window installation to ensure that there are no visible gaps in sealant and the finish is as immaculate as you would expect.
Time To Tidy Up
Once the installation is complete, the installers should take away their tools, tidy the working area and often hoover the floors to leave your home as spick and span as when they first arrived. Be sure to check the working area before they leave to ensure it is left in a clean and tidy state.
If there are any moving parts or special features they will test them and show you how they work. Finally, with a smile they’ll be off into the sunset.
Window Installation Timescale
All our suppliers have many years of experience of supplying and installing high quality uPVC double glazing. They will endeavour to fit your new windows, doors or conservatory as quickly and efficiently as possible.
Your local double glazing supplier will keep you informed of timescales and will always book an installation date that is convenient for you.
Whilst turnaround times may vary depending on specific product requirements or unforeseen circumstances, the information provided below is a good rule of thumb for installation timescales.
Tilt and Turn Windows
Installation within 10-14 days
Bay Windows
Installation within 10-14 days
Sliding Sash Windows
Installation within 21-28 days. Sliding sash windows are a more technical product and therefore take longer to manufacture than other styles of uPVC windows.
Curved Frames
Installation within 21-28 days dependent on specification
Note: If you require bespoke glass please contact your supplier for specific lead times.
uPVC Door Installations
After searching through the many uPVC door styles and securing a fantastic price, you have finally found the perfect new door for your home. You may find yourself asking however, just how long will it take to install my door?
Home improvements can be time consuming – interrupting your day to day schedule. So here at Double Glazing on the Web, we understand that arranging an installation date to best suit you is essential.
Our local suppliers will be able to appoint an installation date which is convenient for you, so that you can experience as little disruption to your schedule as possible.
The length of your uPVC door installation process will be influenced by the products you have chosen to be fitted.
The following information shows the average timescales of uPVC doors, but these of course are subject to manufacturing times and installation schedules. It is always best to check timescales with your double glazing supplier before placing an order with them.
Door Installation Timescale
uPVC Panel Doors
A survey is scheduled within 48hrs of your agreement and are subsequently installed within 10 – 14 days.
Residential Doors
A survey is scheduled within 48hrs of your agreement and are subsequently installed within 10 – 14 days.
French Doors
A survey is scheduled within 48hrs of your agreement and are subsequently installed within 10 – 14 days.
Composite Doors
A survey is booked within 48hrs and installation takes 14 – 21 days. Due to the complex manufacturing process, Composite Doors take slightly longer to supply however installation is a quick & simple.
Sliding Patio Doors
A survey will be booked within 48hrs and your doors installed within 14 – 21 days.
Bi-Fold Doors
A survey is scheduled within 48hrs and your doors can be supplied and installed within just 6 – 8 weeks.
Accredited Double Glazing Installers
Double Glazing on the Web operate a network of local installers across the UK. All the companies that we deal with are fully accredited by an industry governing body such as FENSA or CERTASS.
This means wherever you are in the country, when you choose Double Glazing on the Web you will be dealt with by a trusted local company who will provide an expert and professional service.