Cotswold Casements offers a range of different windows to suit every property.

From the latest W30 steel windows, which offer the most up to date double glazing technology, to the traditionally made leaded light glazed windows, which look great on old stone and brick houses. We are immensely proud of our extensive selection, which includes the ability to replace even 300-year-old flat iron windows! 

Contact us today to explore our extensive selection and find the ideal solution for you.


W30 Windows

W30 steel windows are designed for energy efficiency and have slim section sizes to maximise light in the room. With 18mm double glazing, this model is available in a wide range of colours and ironmongery options, with different glazing types to match the existing leaded or bar designs. This metal window type is required for buildings that are not listed or under conservation.

High Performance

At Cotswold Casements, our W30 steel windows are energy efficient whilst still offering the slimmest steel options on the market. The W30 windows are double weather-stripped and galvanised to prevent rusting.

  • Hot rolled steel section keeping the slimmest sightlines possible
  • Hand fabricated in our factory in Moreton in Marsh
  • Galvanised to protect the windows from rusting
  • Wide range of ironmongery available
  • Powder-coated RAL colour of your choice
  • 18mm double glazed units with a krypton gas and low ‘e’ coating
  • 2.0 U Value and B Rating complying with all current Part L building regulations


SMW Windows

Our SMW range is designed for listed buildings or properties within a conservation area. These windows have ultra-slim sections to match the original steel frames and are available in a wide range of colours and ironmongery options. SMW windows can be single glazed with clear glass or traditional leaded lights, or double glazed with ultra-slim 12mm units. Please note, we must have authorisation from the local authority to fit this type of window.

Single Glazed

Here at Cotswold Casements, we have a wide range of single glazing options available to match your existing windows as closely as possible. Whether you have a 300-year-old single flat iron or a 50 year old F range window, we will have a steel window to match. If you’d like to discuss all your single glazed window needs, please contact a member of the team in the office, and we will be more than happy to help.

Double Glazed

Our slimline double glazed steel windows are the perfect replacements if you’re looking to improve your period property. Keeping minimal steel sightlines to match the original features of many of these buildings, whilst introducing a double weather-stripping system and 12mm double glazed units, these windows are sure to improve the energy efficiency of your home whilst giving a fresh look.

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Listed & Conservation

If your property is in a listed or conservation area it can sometimes be a little confusing as to what you’re allowed to change or how you can improve your property. Here at Cotswold Casements, our workforce has a vast knowledge of these types of properties and we can help with the process, making everything a little easier when it comes to window replacement or refurbishment.

Of course, you always need to check with the Conservation Advisory Panel before making any changes to a listed building. However, you may be able to replace your existing windows with a slimline double glazed version.


Get In Touch

For further information about our range of products and services, call us on 01608 650 568 or complete an enquiry form below. You can also email us at