How Long Does Window Installation Take
Planned to the day, the entire process from first measurement to completion of work and delivery of paperwork to your door can take anywhere from three to four weeks for a straightforward installation.
The Survey And Measuring Stage
A survey for new windows and doors typically takes 30 minutes to an hour per window to measure correctly. Therefore, it’s best to book a survey in advance, ideally 7-14 days prior to manufacture, depending on the installer’s diary. It is advisable to book a survey in advance, especially if you have a time frame in which you require the work to be completed, i.e. before a house move or a family visit.
Manufacture Lead Times
The actual production time varies depending on the item ordered. Standard made-to-measure items such as uPVC and composite doors and windows are generally kept in stock and made within 2-6 weeks. Made to measure Timber Frames, Non Standard Size Items, Painted Items or Items with a Special Woodgrain Finish can take longer to produce as these items are not kept in stock and require specific materials and finishes. The manufacturers lead time for these items can vary and your Installer should advise you of the lead time for your specific order or advise you of a general time frame.
How Many Windows Get Fitted Per Day
A normal fitting team consists of 2 people, and in most cases they can complete 4 to 8 windows per day, depending on the type of product and the number of panes. So for example a small terraced house with 6 normal sized windows could be completed within a day, but a large house with many bay windows could take 2 days or more.
Door Fitting Time
A single entry composite or uPVC door would typically take 2-4 hours to complete. This would include removal of the old door and frame, checking the opening is square, installation of the new frame and door and final sealing of all edges. Installation of front and rear doors on the same day would result in the fitters being on site for the majority of the day.
What Can Push The Job Longer

Occasionally additional time is required for items listed below. A property of solid wall construction will typically require additional making good to the frame in each opening. Render or cladding repairs are also common and allow for adequate time for paint to dry prior to sealant finishing. Upper floor installations may require the use of scaffolding which in itself can take considerable time to erect and dismantle. In some cases unusual openings or those that are only slightly out of square may require on-site modification prior to installation. See also Windows and Doors Cardiff.
Weather And Access On The Day
On the day of the installation itself, the removal of the old frame and the new installation will create an opening that will be exposed to the elements for a short period of time. Therefore, an installation cannot be guaranteed on a wet and windy day. In addition, good access around the property is required for the safe movement of materials. A blocked driveway with parked cars is a major concern as is a narrow side passage.
What Happens On Installation Day
Dust sheets will be used to protect your floors and furniture and once the old frames have been removed the fitters will clean the opening and then fit your new window or door making sure it is level and sealed to ensure no draughts get in. The finishing trims, sills and beads are then fitted. All the packaging and old frames will be taken away from your premises the same day. Your new opening will be weathertight by the end of the day.
The Paperwork Afterwards
Most companies include Building Regulations compliance certificates with the installation completion paperwork and allow 2 weeks for these to arrive with you via post. A reputable installer will be registered with one of the Government recommended schemes for window and door installation such as Certass, FENSA or Vocent. Many installers are able to self-certify their work which means they will complete the necessary paperwork on your behalf and there will be no need for a separate inspection by the Local Authority.
When arranging new Windows and Doors in Cardiff ask your installer for a written breakdown of how they intend to carry out the work, including a day by day breakdown of the survey, manufacture, installation and certification processes.
So, in summary, a typical job, from initial survey to final completion, will take approximately 3-4 weeks to complete and allow for any subsequent paperwork to be completed and processed through the relevant Certification bodies. It is good practice to provide clients with a full outline of all the expected dates and times for all the different stages of the job in order for them to plan accordingly.



