Key Features of French Casement Windows
French casement windows are a great addition to your offering, as they are perfect for homeowners who are interested in unique styles, better ventilation points and emergency exits. You can speak with our team about our supply of French casement windows.

01
Low U-values
These French casement windows offer U-values as low as 0.9 W/m2K, with WERs between C – A++.
02
Weatherproof
Each French casement window comes with a high performance gasket to reduce water ingress. Additionally, all of our French casement windows have been weather tested to standard.
Air Permeability 4
Water Tightness 7A
Wind Resistance A5 2000
03
Maximum Sizes
We provide French casement windows in sizes as large as 900mm X 1400mm (W x H).
04
Acoustic Insulation
Our windows can also provide a measure of acoustic insulation, depending on glazing. We provide three different levels of acoustic performance.
Rw (C ; Ctr) 35 (-2 ; -5) dB
Rw (C ; Ctr) 38 (-1 ; -4) dB
Rw (C ; Ctr) 42 (-2 ; -3) dB
05
Distinctive Designs
French casement windows are an especially attractive option for residential applications. If you’re looking for a product that utilises design, with incredible engineering, look no further.
06
Glazing Solutions
We offer double glazing and triple glazing to our clients. We know how important it is to keep up with government standards. Fortunately, we offer a variety of glazing to help you meet them for end users.
07
Framing
Choose sleek or traditional French casement windows. You get the choice between two outer frame sizes (52mm, 70mm) and the choice of three transom/mullion sizes (68mm, 88mm, 110mm).
We Care About Our Planet
That’s why FastFrame makes sure to use recyclable profiles for its French casement windows. Now, with the addition of Deceuninck’s recycling facilities, we can ensure that we’re using recycled materials and lowering waste.
Consumers’ interest in eco-friendly goods is growing, according to a growing body of research. As a result of environmental awareness, government regulations are gradually tightening.
Please contact us so that we may offer assistance in making the most of our innovative products. Together we can help improve environmental standards for the construction industry.

Technical & Testing Coverage on French Casement Windows
All of our products meet the highest standards for British Building Regulations. We understand the importance of assuring your clients of accredited work.
That’s why FastFrame is accredited with Certass, and Lloyd’s Register Quality Assurance. Furthermore, our company is Kitemark approved to BS EN 12608 and PAS 24 for all of our windows.
Choosing FastFrame
Competition in today’s market is fierce. That’s why it’s so crucial to exercise caution when selecting a manufacturer, supplier, or installer.
FastFrame is a reliable vendor because of our extensive knowledge of our wares, as well as our prompt service and ready inventory. Not only do we have our own cutting plant, but we’re also the only company in the UK to use Linktrusion, which gives us some extra credibility.
In addition, our commercial customers value our approval as an installer. Our business is certified to both ISO 9001 and ISO 14001.
Sample Brochure
Sample Brochure


Find a unique colour that suits your style
We provide a wide range of colours from stock for our trade and commercial customers. Standard colours like Traffic White are perennially popular, with Anthracite Grey has become popular in recent years.
If you’re in the trade, read more about our offerings of Rosewood, Chartwell Green, and Irish Oak. Speak to our team about the most popular colours for residential and commercial applications.






















Our Latest Projects
Read through the case studies of our latest projects. View our products in both residential and commercial installations. Find French casement windows and other windows here.
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Our customer service team is dedicated to your peace of mind. Speak with our team about the application of our windows and doors in commercial and residential applications.

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Frequently Asked Questions
Do you deliver?
Yes. Speak with our team today if you’re in the trade, looking for French casement windows.
Do you install?
Yes, however we work exclusively with commercial projects.
What other products do you offer?
We offer other casement windows, and different systems. Look at our Heritage 2500 vs our Heritage 2800. All the specifications listed here are for the Heritage 2500 range.