Quality Alitherm Heritage Windows

Add a modern touch to your home with our high quality aluminium windows from Smart Systems. Suitable for any kind of property, our Alitherm windows are energy efficient, secure, low maintenance and incredibly stylish. Designed to transform your property, our Alitherm Heritage windows are a truly outstanding addition to any property.

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  • Screw Icon Quality Products Manufactured bespoke to exacting standards
  • Performance profile icon High Performance Ultra thermally efficient profiles
  • Style icon Contemporary Styling Modern sash styling for great aesthetics
  • Colour icon Colour Range Standard, premium & RAL finishes available
  • Hardware icon Hardware Range Comprehensive hardware selection available

Market-leading aluminium windows in Bristol, Bath, Wiltshire and Gloucestershire

Give your property a new lease of life with our Alitherm Heritage windows. Crafted with precision, our aluminium windows are available in a range of configurations and customisation options, enabling you to find the perfect fit for your property. Our aluminium windows are available in a range of colours and hardware options including monkey tail handles, bulb-end handles, and art deco options.

Energy-saving aluminium windows

Designed with performance in mind, our aluminium windows feature an innovative polyamide thermal break which effectively works to create a barrier between the cold air outside and the warm air inside. Achieving A+ Window Energy Rating and incredibly low U-values, our Alitherm windows prevent heat loss and help to save you money on your energy bills.

Highly-secure aluminium windows in Bristol

Security comes as standard with our aluminium windows as they come fully equipped with multipoint locking systems and quality handles and hinges. They have also undergone extensive tests, enabling them to achieve the PAS24 accreditation. As well as offering maximum protection, our aluminium windows are also low maintenance, so you can enjoy hassle-free living with our aluminium windows.

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    Stunning range of colours

    Our Alitherm windows are available in any RAL colour as well as choice of standard or non-standard colours, including metallic, dual colour, Smart’s Sensations textures, and Alchemy anodised effect finishes. With so many options available you’re bound to find the ideal match for your property.


    Quality hardware options

    Our Alitherm Heritage windows are available in an extensive selection of hardware options including a range of handles, hinges and additional extras. Create a lasting impression with our monkey tail, bulb-end, and Art Deco handles.


    Decorative glazing for aluminium windows

    Techniglaze aluminium windows are glazed with high-performance glass from either Pilkington, Guardian, or Saint Gobain. Each of these companies supply a wide range of glazing options including energy-efficient glass, self-cleaning glass, anti-condensation glass, and textured and obscure glass. All our glazing meets stringent Building Regulations requirements for security, safety, and energy efficiency.

    One of our aluminium installation projects for commercial contract

    Latest Projects

    View our latest Commercial and Retail projects and see the high quality of our products and installations and learn more about how we work.

    Team of installers

    Fully Accredited

    We train our factory and installation teams to the highest standards and have accreditations from FENSA, TrustMark and others to ensure compliance in all our projects.

    Architects drawing with project specifications

    Technical Experts

    With over 40 years of trading and a deep knowledge of the industry from fabrication to installation, we are perfectly situated to offer expert advice on your projects.

    Our latest reviews

    Ali & Fi

    We are delighted with the windows, and have already been complimented by our neighbours on the upgrade.

    Tyler and Paul were very professional and showed good initiative for the inevitable adjustments that needed to be made. They were particularly considerate of our house, it’s character and our pets! Please pass on our thanks and comments as appropriate.


    We are delighted with the windows. As you know we were concerned that they would look different and more “clunky” but really you can’t tell the difference except that the new ones are not falling apart!!! The guys who did the fitting were also good. They were working in freezing fog, really cold but they carried on regardless, they were extremely tidy and cleared up after themselves.

    Roy Robinson

    I am delighted with the recent installation, it’s good to look out of clear windows. The work was carried out professionally by two excellent gentleman.
    I will not hesitate to contact you when I am ready to replace others, also would certainly recommend you to others.

    Grant Spicer

    Really impressed with the customer service and professionalism from everyone at Techniglaze. Especially liked the follow up call after our doors were fitted to make sure we were happy. Would definitely recommend.

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    Dr S Irving

    Excellent. This company really care about doing a great job. Roger and Keith have been very helpful and explaining things in detail that a lay person may not understand.

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    UK Chiropractic

    Excellent customer service, range of products and attention to detail. I honestly can’t rate them highly enough. They stepped in and came to the rescue after Salisbury glass cost us 8 months of time and 100k in increased material costs.

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    Elsa Marques

    These guys have been great to us. Helped us out at short notice after we were badly let down by another supplier. We asked for several minor details that were not standard (e.g. different locking mechanisms), and they were flexible and open to ideas. We ended up also commissioning our front door from them; it is super sturdy and beautiful. Always courteous, professional, and good payment terms.

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    Adam Barnes

    First class service for my window repair, with tricky access issues and a large, heavy glazed unit to install. Really glad I chose this company.

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    Jim McGarity

    I was looking for a company that could deliver a bespoke pair of roof lights in the Alitherm system. Techniglaze offered the best price and worked with us to ensure the sizes were exactly right and conducted the sales process very professionally. The product is first class and we are exceptionally pleased with the service and product. I can highly recommend Techniglaze.

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