Exceptional style & functionality

At QBD, we believe that the windows and doors should be more than just functional. They should be a source of beauty and delight, adding character and style to your home. That’s why we offer a range of stunning, bespoke windows and doors by Rationel, that are as unique as the homes they adorn.

Drawing on Scandinavian design principles that emphasise simplicity and functionality, Rationel products are built to last for decades and to be enjoyed for generations. And because they are created using only sustainably-sourced timber, you can be sure that your new windows and doors will have a minimal impact on the environment.

Whether you’re looking for something traditional or modern, Rationel team of experts will work with you to create a window or door that perfectly fits your style. So if you’re ready to transform your home, get in touch with QBD today. We can’t wait to help you create something truly special.

Backed by warranty

At QBD, we only offer the best products that meet our high standards. We believe that our customers deserve nothing less. That’s why we’re proud to offer Rationel windows and doors. They are some of the best on the market, and they come with a comprehensive warranty.

In the unlikely event that something does go wrong, you can rest assured knowing that Rationel will take care of it. So choose Rationel with confidence, knowing that you’re getting a quality product backed by a company that stands behind it.

A wide range of quality products


  • Fixed light windows
  • Top guided windows
  • Side hung windows
  • Side guided windows
  • Fully reversible windows
  • Tilt & turn windows
  • Shaped windows


  • Flush entrance doors
  • Glazed entrance doors
  • Patio doors
  • Tilt & turn doors
  • Casement doors
  • Sliding patio doors

Get a quote for Rationel windows and doors