Classic Slimline Windows

Enchantingly traditional and inspiringly contemporary

Timeless Heritage Design with Modern Aluminium Precision

The Classic Slimline Window brings together refined heritage aesthetics and modern precision, creating a window that feels timeless yet distinctly contemporary. Designed for luxury homeowners who appreciate character and design, it combines elegant, slender frames with advanced performance to deliver light-filled spaces that are warm, quiet, and effortlessly stylish. With ultra-slim aluminium sightlines and delicately profiled edges, the Classic Slimline Window echoes the proportions of traditional steel-framed windows — perfect for period properties or modern homes that embrace subtle architectural detailing. The result is a beautifully balanced design that enhances your home’s exterior while allowing more natural light to flow inside, creating bright, inviting interiors with uninterrupted views.

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Ultra-Slim Aluminium Frame Design

Enjoy uninterrupted views and beautiful natural light with the Classic Slimline Window’s minimalist aluminium frames — perfect for both modern homes and period renovations.

Timeless Heritage Aesthetic

Inspired by classic steel and timber windows, the Classic Slimline Window blends traditional elegance with modern performance, ideal for heritage properties and stylish contemporary homes.

Energy-Efficient and Acoustic Comfort

Stay warm, quiet, and comfortable all year round with advanced thermal insulation and precision-engineered glazing that reduce heat loss and block unwanted noise.

Sustainable, Low-Carbon Aluminium

Made from Hydro CIRCAL® aluminium containing at least 75% recycled, end-of-life material, the Classic Slimline Window offers luxury design with genuine environmental integrity.

Heritage Design

Classic Slimline windows offer a range of external and internal styles to ensure you get the right look for your home.

Product Performance

Delivering excellent thermal efficiency, strong acoustic insulation and reliable weather performance, the Classic Slimline Window keeps your home warm, quiet and comfortable throughout the year.

Classic Slimline Open In Window

Performance

Thermal

Up to

0.8 W/m²K (Uw) with triple glazing

Acoustics

Up to

48 dB reduction

Security

Level

RC2 & PAS 24

Resistance

Air

Up to

A4 (600 Pa)

Water

Up to

AE (1050 Pa)

Wind

Up to

C5 (2000 Pa)

Environmental performance

## Environmental Performance We offer high-performing products, and our aluminium material contains at least 75% of recycled and 95% of recyclable content. By choosing products from TECHNAL, you can be assured that you are choosing the greener option for your home.

Lower Carbon Footprint

By using Hydro CIRCAL© aluminium, with just 1.9 kg CO2e/kg of aluminium, we provide a drastic reduction in CO2 emissions. The carbon footprint is reduced by more than 85% when compared with the global average for primary aluminium production.

75% recycled

95% recyclable

Our products are 95% recyclable. When we design our solutions, we design for circularity by making sure their dissambly and re-use at the end of their life is taken into account. This reduces the amount of items sent to landfill, and ensures that less resources are removed from the Earth.

Fully Certified

Ask your fabricator for your Environmental Product Declaration (EPD) so you can see how sustainable your product choice is.

Colour and Finish

From neutral tones to metallic finishes, you can adapt your TECHNAL products to suit your taste. Dual-colour options even provide the choice of two colours inside and out for the ultimate customisation.

Classic Handles

Sleek and elegant, our handles give you the ability to customise your window even further. Every detail is thought of, adding that special touch to your home.

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Are you ready to transform your home? Let's talk about your project

Whether you’re building from the ground up or re-imagining the home you love, we’re here to help you create brighter, more refined living spaces. Our TECHNAL aluminium windows, doors, and sliding systems are made with Hydro CIRCAL® low‑carbon aluminium, offering elegant design, lasting quality, and performance you can feel every day. Share your plans with us and we’ll help you bring your vision to life.

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