Advance Building Plastics supply a fantastic range of French casement windows to tradesmen and homeowners. A slight variant on the classic casement window style, we supply these windows out of our Hereford and Kingsbridge showrooms, offering them to those in all the surrounding South West counties. Start an online quote request, or contact us today to receive a price, have a query answered or to chat with our fantastic customer service team.


Featuring a night vent as standard, you can also add controllable or permanent ventilators, which are fitted within the head profile of the window.

Colour Options

Our French casement windows come in a range of colours and finishes. No matter personal tastes, project type or budget, we’ll have an option for you.

Reduced Energy Bills

Our French casement windows will reduce any property’s energy bills, providing U-values as low as 0.9 W/m2k and providing WER ratings of A+.

Colour Options

Glass Options

white chartwell-green dark-red brilliant-blue Steel-Blue agate-grey
clear casement-arctic-cutout casement-autumn-cutout casement-chantilly-cutout casement-charcoal-sticks-cutout casement-contora-cutout casement-cotswold-cutout casement-everglade-cutout casement-digital-cutout casement-flemish-cutout casement-florielle-cutout casement-minster-cutout casement-mayflower-cutout casement-oak-cutout casement-stippolyte-cutout casement-pelerine-cutout casement-sycamore-cutout casement-taffeta-cutout casement-warwick-cutout

Thermally Efficient French Casement Windows

Our French casement windows provide amazing levels of energy efficiency. Homeowners can enjoy a property that stays cool during summer and warm in the winter months. By removing the central column in the design of these casement windows, more natural air can flow through the window, enhancing ventilation.

The chambered profile works alongside the double or triple glazing to trap warmth inside the home. The multiple chambers inside the window profile traps pockets of air inside to create a barrier which prevents the cold transferring into the building.

The French casement windows we supply have been specially designed to withstand the very worst of the British weather. The gaskets contained within the frame will eliminate cold draughts and water ingress. Our French casement windows have been rigorously tested to meet and exceed British standards for weatherproofing, air tightness and wind resistance.

Secure, Robust French Casement Windows

The French casement windows we supply to both homeowners and tradespeople are fitted with multipoint locking and double or triple glazing panes, offering an excellent level of security across the frame. The profile of the French casement windows we supply are reinforced with recycled thermal inserts, aluminium and/or steel, for maximum homeowner peace of mind. For added peace of mind, we provide double and triple glazing replacement services.

This design of window features a patented bolt to prevent sideways movement of the bolt when under attack. The heavy duty bolt featured within the window has a greater contact area compared with competitor shoot bolts on the market.

Our French casement windows are fitted with 10mm weatherseals as standard to ensure they are completely watertight. This protects homes against the elements, eliminating the likelihood of damp spots, rotting or water damage occurring. By weatherproofing the windows, they will be protected from rust or warping, ensuring they last for a long time and stay looking great. Each window system we supply have been stringently tested for their durability and performance.

Request a French Window Quote

Request a price for a set of French casement windows through our online form. Provide us with specifications of your desired products, and we’ll be in touch with a supply only quote.

You can also get a price for a set of French casement windows by visiting either of our showrooms today.


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