Timber-Aluminium Windows

HV 450 Timber-Aluminium Windows

Our HV 450 timber-aluminium windows offer four in one functionality with protection from the sun, thermal insulation, sound reduction and increased privacy. Available nationwide with unbeatable Internorm I-tec Core, Shading and Glazing technology, our HV 450 timber-aluminium windows have excellent energy efficient properties, attaining a U-value of just 0.62 W/m2k.

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Thermal Insulation (in W/m2K):

Uw up to 0.62


Sound Reduction (in dB):

41 - 46



Secured by Design & PAS 24

More Info

These HV 450 timber-aluminium windows can adapt to fit almost any home with a variety of opening versions. Designed with your safety and security in mind, hidden locks and optional additional protection mechanisms will give you complete peace of mind. Use our online contact form to request a quote for our HV 450 timber-aluminium windows today.

Technical Specifications

Dimension (in mm) Opening Versions Gaskets
Frame construction depth 85
Quantity 3
View width frame/sash 88
Turn and turn/tilt
Colour Black
View width flying mullion (2 sashes) 108
View width transom/mullion (2 sashes) 123
Sliding window
Lockable doors
Sliding doors
Doors with threshold
Outward Opening Doors

Features & Benefits

Latest Technology

Our HV 450 timber-aluminium windows use integrated I-tec Glazing to protect blinds from dirt and the effects of adverse weather. I-tec Shading creates advanced sun protection in our Internorm windows and also offers privacy protection.

Thermal Insulation

Internorm’s unique I-tec Glazing makes our HV 450 timber-aluminium windows extremely energy efficient. With heat insulating glass as standard, these Internorm windows also have sound reduction properties of up to 46 dB.


Our HV 450 timber-aluminium windows are designed to be secure, with concealed locking mechanisms. We offer optional RC1N or RC2 burglar and intruder protection and our Internorm windows are compliant with PAS 24:16 security rules.

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HV 450 Timber-Aluminium Window Prices

You can call us on 0800 612 6519 to request a quote for our HV 450 timber-aluminium windows. Our team of experts will be happy to give you bespoke advice for your project. Use our online contact form to learn more about our design, supply and install process or ask any questions which you may have about our windows. You can visit one of our showrooms by booking an appointment online. We have a handy Showroom Finder tool to help you discover the closest one to you.

Extra Features


All our Internorm windows can be intricately customised to the requirements of your house or building project. With handles, hardware and glazing to choose from, these windows can be perfectly fit for purpose and enjoyed by the end users.

Find Out More
Window Hardware Installers Gloucestershire

Case Studies

Read through our case studies to learn about previous projects which we have completed as part of home renovations and new build projects. You can see before and after images of our installation process and gain new inspiration for your own project.

View All Case Studies
Minimal Frame Aluminium Windows Gloucestershire


Our showrooms offer a new perspective on our Internorm windows, with our product specialists on hand to price up your project or give you more details. With locations across England, Wales and Scotland, use our Find A Showroom tool to discover the nearest one to you.

View Showrooms
sliding door showroom

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