Our Products


Our windows are stylish, modern and fully customisable so that you can design to your own specification and requirements.


We offer a wide range of door products including residential, uPVC, composite doors, french doors and stable doors. For a full list of features and benefits, take a look at our doors category.


Modern conservatories and orangeries today are much more versatile and offer many different uses such as garden rooms, dining rooms, kitchen extensions.

Roof Lanterns

If you are looking for elegant and stunning skylights or lanterns, we are here to help. We offer a wide range of skylights and lanterns at fantastic prices.

Commercial Shopfront Windows

If you are looking for elegant and stunning skylights or lanterns, we are here to help. We offer a wide range of skylights and lanterns at fantastic prices. Contact us if you need assistance with choosing the perfect products for your home improvement project!

Origin Global

The world's leading brand of aluminium windows and doors. An Origin product is a completely bespoke product, tailored exactly to your size, colour scheme, finish and accessory requirements.

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Double Glazing in Cheltenham and Gloucestershire

Double Glazing in Cheltenham and Gloucestershire

Quality By Design (QBD) are a well established double glazing company in Cheltenham with over 35 years of experience specialising in the installation of windows, doors and conservatories. We carry out each installation with care and professionalism, giving you exceptional service and superior products. Our knowledge and expertise help us to deliver the best glazing solutions for our customers.

When it comes to home improvement, there are few things that have as much impact on the look and feel of your property as a new window or door. One thing you should think about when choosing what type of window or door is right for your home is how they will blend in with the overall design. Our range includes products from leading manufacturers, all made to measure with luxurious finishes. Browse our website now if you want more information on which product best suits your needs or contact us today!

Transform your home with Origin aluminium windows and doors, expertly made in the UK

Transforming homes throughout Cheltenham and Gloucestershire with Origin’s range of aluminium windows and doors. Upgrade your home with our premium products for a contemporary feel.

Find out more about Origin
Origin Bifold Door in Grey
Latest projects

We pride ourselves on offering a personal service. Communication is of paramount importance to us from when you make the first enquiry to when our fitters turn up on time, with an understanding that they should treat your property as your home and not just a place of work.

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    What our customers say

    We are new to the area and wanted a new Origin door, cutting out and installing. QBD were fantastic from quote, survey supply and fit. Clean, tidy, attention to detail, considerate and meticulous is a fair description. Reasonably priced for the high end quality door i knew i was getting. I would without hesitation recommend Arron and his team to anyone wanting new doors. I will be using them again. Thank you Scottie too for your amazing craftsmanship.

    Clean, tidy and attention to detail

    31 January, 2024

    QBD provided me with a straightforward and competitive quote. The installers turned up when they said they would and despite it being near zero all day installed all 4 windows, which look great. Overall great service and better value than the nationals.

    A quick and efficient service

    11 December, 2023

    We've had two installations done with QBD and both have been fantastic. We had a new front custom front door and new origin sliding bifold doors. Both have made such a difference to our property. QBD we're excellent at every step - and the fitting of both products was professional and fast. I'd highly recommend them to anyone considering new doors and windows.

    Excellent every step of the way

    19 June, 2023