Upgrade Your Property with Aluminium Casement Windows

Name: Aluminium Casement Windows
Brand: Direct Trade Windows
Rating: 5 (200 reviews)

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Versatile system for residential and commercial properties

At Direct Trade Windows, we expertly install aluminium casement windows in both commercial and residential properties.

Using Smart’s Alitherm Heritage model, this versatile system is an excellent addition to any property, and is ideal for projects that require planning permission.

Our casement windows are:

Versatile – Fixed, single or double sash, top hung, tilt & turn, or pivot options.
Thermally efficient – Polyamide thermal break enhances thermal efficiency.
Durable – Perform consistently for several decades without wear and tear.
Secure – Equipped with full PAS24 accreditation.

About Us

Trusted manufacturers since 2000

Professional Installer Network

Quick Supply

Made in the UK

Exceptional Quality Control

Knowledgeable Family Run Business

Bespoke Complex Products Fabricated

Alitherm Heritage Casement Windows

Alitherm Heritage casement windows are built as a series of horizontal modules which can be stacked using horizontal couplers from a multi-part window featuring a specially designed drip bar between modules.

U-value of 1.5 W/m²K
Document L compliant
PAS24:2016 accredited
Fixed, tilt & turn, side hung or top hung casements available
Polyamide thermal break provides enhanced thermal performance

Dimensions:

Side hung maximum width: 600mm
Side hung maximum height: 1400mm
Top hung maximum width: 1400mm
Top hung maximum height: 1400mm
Fixed maximum width: 2100mm
Fixed maximum height: 2100mm

Alitherm Heritage Casement Windows

Colours

Glass Options

Hardware Options

Downloads

Gallery

Alitherm Heritage Casement Windows

Technical Specification

Brand Alitherm
Material Aluminium Polyamide
Dual Colour Yes
Thermally Broken Yes
NBS Available Yes
WER Rating B
U Value 1.5W/m²K (using 1.0W/m²K glass unit)
Document L Compliant Yes
Kitemark Yes
BS 6375-1:2009 Yes
BS 4873 Yes
Side Hung Max Width (mm) 600
Side Hung Max Height (mm) 1400
Top Hung Max Width (mm) 1400
Top Hung Max Height (mm) 1400
Fixed Max Width (mm) 2100
Fixed Max Height (mm) 2100
Single Door Max Width (mm) 900
Single Door Max Height (mm) 2100
Glazing (mm) 24, 28, 32 & 36 double or triple glazed units
Frame Depth (mm) 47
Typical Sightlines (mm) 59

Colours

Pure White RAL-9010

Matt White

Matt Brown

Jet Black RAL-9005

Grey

Gloss White

Gloss Off White

Dark Red

Dark Grey

Dark Green

Dark Brown

Dark Blue

Cream

Black

Anthracite Grey RAL-7016

Airforce Grey

Glass Options

Unglazed

Standard Self Clean

Standard Tough

Solar Control

Self Cleaning

Self Clean Solar Control

Satin Obscure

Laminated Security

Hardware Options

Peg Stay Monkey Tail & Pear Drop

Peg Stay Catch

Pear Drop Handle

Monkey Tail Handle

Dummy Butt Hinge

Standard Handle Brass

Standard Handle Satin

Standard Handle Chrome

Standard Handle White

Standard Handle Black

Downloads

Alitherm Heritage Brochure

Alitherm Heritage Data Sheet

Gallery

Traditional style home with Alitherm casement windows

Alitherm casement windows on stone property

Interior of modern kitchen with smart casement window

Aluminium Casement Windows - Your Questions Answered

Explore common questions about our Aluminium Casement Windows, suitable for both residential and commercial properties. Discover how these windows offer durability, performance, and energy efficiency.

Get a Free Quote for Alitherm Heritage Casement Windows

What are Aluminium Casement Windows, and where can they be installed?

Aluminium casement windows are a versatile window system suitable for both residential and commercial properties. They can be installed in various settings, including homes, offices, and other commercial buildings.

What are the key features of these casement windows?

These casement windows offer versatility with options such as fixed, single or double sash, top hung, tilt & turn, or pivot styles. They are thermally efficient thanks to a polyamide thermal break, built for long-term durability, and equipped with full PAS24 accreditation for security.

How energy-efficient are Alitherm Heritage Casement Windows?

Alitherm Heritage Casement Windows have a U-value of 1.5 W/m²K, making them energy-efficient and compliant with Document L standards. The polyamide thermal break enhances their thermal performance.

Can I get custom dimensions for these casement windows?

Yes, you can. Depending on your needs, you can choose from a variety of dimensions for side hung, top hung, and fixed casement windows, providing flexibility for different project requirements.

Are these windows suitable for projects that require planning permission?

Yes, these casement windows, particularly using Smart's Alitherm Heritage model, are ideal for projects that require planning permission due to their versatile and high-quality design.

Delighted Customers Share Their Experiences

At Direct Trade Windows, our commitment to excellence is reflected in our exceptional customer satisfaction.
We take great pride in our impressive 4.9 rating on Google, a testament to the unparalleled quality and service we offer.

Check Out Our Google Reviews

Highly recommend this company for doing a fantastic job in fitting windows and doors. Very good quality windows , fantastic service and all for a good price. Attention to work on there fitting. We are extremely happy

Jack Vasiliou

Brilliant company, everyone I dealt with through from initial quoting to installation were very helpful and friendly, the fitters were excellent, the product is fantastic and the price is reasonable, what more can you ask for!

Ryan Flynn

Superb company. Highly recommend them. Proper engineers for design and fitting. We changed spec due to some building changes and they were clear and responsive to queries and redesign. Really trustworthy group of people from sales to design to fitting. I would use them again without hesitation. Warm regards Daniel

Daniel Champman

The team delivered great sliding doors at a more competitive price than other suppliers. They responded to our changing development schedule without making it an issue and have provided great aftercare as well.

Daniel

We had been severely let down by a previous supplier, but when we turned to Direct Trade Windows for help, we hit the jackpot. Helping us to transform a residential development in Hersham, they supplied us with high-quality, ultra-slim Cortizo sliding doors, complete with the bespoke sliding options that we needed. Our requirements were very specific and not readily available on the market, but Direct Trade Windows really went the extra mile to help us out, coming through with quality products and excellent service. We will definitely be using their services again.

Park Lane Developments

Nothing but praise for this outfit. It was a pleasure to work with them. It was a nerve-wracking undertaking for us, the biggest single expense to fit three large window/french door combos in our extension, yet the team made it a relatively relaxing experience with their professionalism and good humour. Thank you all so much for everything you and the whole team have done to get from the initial sale (well done Hash!) to the fun visit we made to the workshop, to the design and its multiple iterations (thank you Taz!) and finally to the installation. Thoroughly recommended.

Eloise Price