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Alitherm Heritage Casement Windows
More about Alitherm Heritage Casement Steel-look Windows
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Alitherm Heritage Steel-Look Tilt & Turn Windows
Alitherm Heritage steel-look tilt and turn windows offer the perfect balance of classic design and contemporary functionality. Inspired by traditional steel-framed windows, they feature ultra-slim sightlines and optional heritage glazing bars—ideal for period renovations, art deco properties, and modern interiors that call for industrial style. The dual-function tilt and turn opening adds practical ventilation and easy access, making them as convenient as they are stylish.
Manufactured in-house by Direct Trade Windows using Smart Systems’ trusted aluminium profile, these windows provide strong thermal insulation, PAS24-certified security, and full compliance with modern building regulations. With a wide choice of colours, finishes, and configurations, our Alitherm Heritage tilt and turn windows are designed to bring lasting value, versatility, and elegance to any space.
Key Features:
- Steel-look styling: Slimline aluminium frames with heritage-inspired detailing
- Dual-function opening: Tilt for ventilation or fully open inwards for cleaning and access
- Thermally efficient: Thermally broken profiles to reduce heat loss and improve comfort
- Secure and compliant: PAS24 tested, Document L compliant, and multi-point locking
- Flexible designs: Suitable for residential or commercial heritage-style applications
- Custom finishes: Available in RAL colours, dual colour, textured or metallic coatings
Technical Specification
Technical Specification – Alitherm Heritage Tilt & Turn Windows
- Application: Ideal for listed buildings, heritage properties, and conservation area renovations
- Opening Options: Fixed, top-hung, side-hung casements, tilt and turn
- Thermal Performance: U-value 1.5 W/m²K (using 1.0 W/m²K sealed unit)
- Window Energy Rating (WER): Band B
- Air Permeability: Class 4 (600 Pa)
- Water Tightness: Class 9A (600 Pa)
- Wind Resistance: Class AE (2400 Pa)
- Compliance: Document L compliant
- Test Standard: BS 6375 Part 1: 2009 Resistance to Weather
- Frame Depth: 47 mm
- Glazing Options: 24 mm, 28 mm, 32 mm, or 36 mm double glazing
- Finish Options: Marine-grade polyester powder coat in single or dual RAL colours
- Max Side-Hung Vent Size: Width: 700 mm | Height: 1400 mm | Weight: 40 kg
- Min Side-Hung Vent Size: Width: 300 mm
- Max Top-Hung Vent Size: Width: 1400 mm | Height: 1300 mm | Weight: 40 kg
- Min Top-Hung Vent Height: 275 mm
Colours
White aluminium frame colour finish sample.
Matt white aluminium frame colour finish sample.
Matt brown aluminium frame colour finish sample.
Jet black aluminium frame colour finish sample
Grey aluminium frame colour finish sample.
Gloss white aluminium frame colour finish sample.
Gloss off white aluminium frame colour finish sample.
Dark red aluminium frame colour finish sample.
Dark grey aluminium frame colour finish sample.
Dark green aluminium frame colour finish sample.
Dark brown aluminium frame colour finish sample.
Dark blue aluminium frame colour finish sample.
Cream aluminium frame colour finish sample.
Black aluminium frame colour finish sample.
Anthracite grey aluminium frame colour finish sample.
Airforce grey aluminium frame colour finish sample.
Glass
Unglazed aluminium window frame with angled top.
Standard self-clean glass panel with clear finish.
Standard toughened glass panel with clear finish.
Clear solar control glass panel for improved comfort and energy efficiency.
Self-cleaning glass panel designed to break down dirt and reduce cleaning frequency.
Self Clean Solar Control panel combining dirt-repelling and heat-reducing technology.
Satin obscure glass panel with smooth frosted finish.
Laminated security glass panel with clear finish.
Hardware
steel look window hardware
close up of steel look hardware
Monkey Tail Handle
Pear Drop Handle
Brochure
Gallery
FAQs About Alitherm Heritage Steel Look Tilt and Turn Windows at Direct Trade Windows
What are Alitherm Heritage windows?
They are slimline aluminium windows designed to replicate the classic steel look while offering modern thermal performance.
How are they different from steel windows?
Alitherm Heritage windows look like steel but use thermally broken aluminium for better insulation and lower energy bills.
Do they meet UK building regulations?
Yes. They achieve compliant U-values, weather ratings, and security standards for use in residential and commercial projects.
What styles are available?
The range includes fixed, side-hung, top-hung, and tilt & turn windows, all with slim sightlines.
Are they energy efficient?
Yes. The polyamide thermal break improves insulation and reduces heat loss compared to traditional steel windows.
Can they be customised?
They come in a wide choice of powder-coat finishes, dual colours, and heritage-style hardware.
Where are they most suitable?
Perfect for heritage renovations, period homes, or modern projects seeking a steel-look design.
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