Your Hertfordshire Home Improvement Specialist
From UPVC Windows and Doors, Composite Doors, Bi-fold Doors, Patio and French doors, Aluminium Windows and Doors to complete Garden Rooms.
With over 20 years experience, our team has a wealth of knowledge in the industry, offering independent and honest advice on our range of products ensuring we find the best solution for your needs. Our products are made to measure and our surveyors and installers are trained to the highest standards.
OUR PRODUCTS
- UPVC Windows
- Aluminium Windows
- Timber Windows
- Front & Back Doors
- Bifold Doors
- French/Patio/Sliding Doors
- Roof Lanterns
- Garden Rooms
- Conservatories & Orangeries

OUR WHOLE ETHOS IS BASED ON TRANSPARENCY AND INTEGRITY WHICH IS WHY WE GIVE YOU ONE PRICE, OUR BEST PRICE
Simon Dunster, Owner & Founder
“With over 20 years experience within the Window & Home Improvement Industry, I have witnessed, experienced and understand first hand, how this industry has acquired such a poor reputation and hence why “The Open Window Company” was founded.
Our purpose and vision as a company is to demonstrate and offer an entirely different, transparent, easy & trustworthy method of improving your home through your “journey” with The Open Window Company.”

Simon and his team did a great job fitting some new timber windows for a Grade II property which many companies couldn’t offer. In contrast, Simon could not have been more helpful, sourced a really good product and gave us a great price. The fitting went very smoothly and they cleared up and took away the old windows. I would highly recommend The Open Window Company!
Nigel Adams, Hertford