New windows and doors are a major investment, and the quality of the installation matters just as much as the product itself. A poorly fitted window will let in draughts and water whatever it cost. These are the things worth checking.
Check the registration
In England and Wales, replacement windows and doors must comply with Building Regulations. Installers registered with a competent person scheme such as FENSA can certify their own work and register it with the local authority. Ask for the certificate when the job is finished and keep it safe, as buyers’ solicitors will ask for it.
Get everything in writing
- A clear written quotation listing what is included: products, colours, glass, handles and trims.
- Details of the price, deposit, payment terms and the timescale.
- What happens to your old windows and the rubbish.
- The guarantee on the products and on the installation.
Be wary of pressure
Be cautious of anyone who insists you must sign today to get a “special discount”. A good company will give you a fair price, time to think and honest answers.
Do your homework
- Read independent reviews and look at photos of completed work.
- Ask how long they have been trading and who will actually be doing the fitting.
- Make sure someone will return to put right any problems after the work is finished.
How we work
We are a local, FENSA-registered team that gives straightforward advice, transparent pricing and no pressure tactics. If you would like a second opinion on a quote you have received, we are happy to take a look.

