Steel Replacement Windows Leeds
Upgrade your property with premium steel replacement windows Leeds. Expert installation, sleek designs, and energy efficiency tailored to your home or business.
The Alitherm Heritage HISTORIC system offers ultra-slim, thermally efficient, and secure aluminium windows, making it an ideal choice for steel replacement windows Leeds. It’s perfect for openings with through stonework or slim stone mullions and transoms, preserving the authentic appearance of historic buildings while improving energy efficiency and security.
Key Features
Much lower in cost compared to steel
Optimum thermal efficiency to Grade B
Ultra slim framework ideal for fitting between stone mullions
Replicates the appearance of steel
Approved replacement for listed buildings by many council authorities
Rust proof
Paint finish guarantee – 25 years
Dual colour possible
10 year Manufacturers Warranty
The Alitherm Heritage HISTORIC window system is also the perfect solution for timber sub frame applications and is available with a choice of outer frame profiles to accommodate different timber rebates. With an authentic stepped aluminium profile and classic hardware options our Heritage HISTORIC aluminium window system is the perfect choice to sympathetically replicate the style and timeless appearance of old steel windows from Edwardian, Georgian and period bygone eras.
The system has been specifically designed as an ultra slim, thermally efficient and secure aluminium replacement for traditional steel windows.
Product Information
Inspired by the aesthetics of traditional steel windows, Alitherm Heritage HISTORIC features signature slim sightlines and attractive contours making it the ideal choice for heritage building conservation areas where building regulations demand a like-for-like replacement.
Heritage HISTORIC slim systems have already been approved as replacement windows for listed buildings by many councils.
All main profiles feature polyamide thermal break technology that enhances the thermal performance of the product, allowing Heritage HISTORIC windows to achieve a window energy rating ‘B’ grade when fabricated with the correct specification and glazed unit. Profiles have a high quality powder coated paint finish at our system suppliers state of the art paint facility in a choice of finishes, including single or dual colour, in a range of standard and non-standard colours.
Design Applications
Windows: fixed windows, side hung & top hung open out casement
Marlin are the No:1 Supplier of Heritage Glazing in the UK
View all of our Heritage Glazing Products HERE
Features
- Window Energy Rating ‘B’ – U Value 1.4 W/m2K (using sealed unit 0.9 W/m2K)
- 1.4 W/m²K with 0.9 centre pane U value
- Method of fabrication: corner crimping
- 28mm glazing
- Gasket glazed
- High security multi point locking
- Traditional Art Deco handles available
Technical Specification
General
| Product Type | Windows and Doors |
|---|---|
| Material | Aluminium Polyamide |
| Dual Colour | ✔ |
| Thermally broken | ✔ |
Performance
| Max width (door) | 900mm |
|---|---|
| Max height (door) | 2100mm |
| Max weight (door) | 60kg |
| Thermal suitability | ★★★★★ |
| Glazing | 28mm |
Locking options
| Multi-point | ✔ |
|---|
Building suitability
| Light duty | ✔ |
|---|
The grasp of the importance of design and quality of manufacture from the Marlin Team is second to none.
Benefits of the Alitherm Heritage HISTORIC Steel Replacement Window System
The Alitherm Heritage HISTORIC steel replacement window system offers a range of benefits that make it an excellent choice for both historic and modern properties. Its ultra-slim aluminium frames authentically replicate traditional steel windows, preserving the character and charm of heritage buildings. The system is highly thermally efficient, reducing energy costs and improving indoor comfort by minimising heat loss.
Its strong, secure construction enhances property security while the slim design allows for installation in challenging spaces, such as through stonework or narrow mullions, without sacrificing strength or style. Combining timeless aesthetics with modern performance, this system delivers lasting value and visual appeal.
Latest projects
STEEL REPLACEMENT WINDOWS
Shireburn House – Lancashire
STEEL REPLACEMENT WINDOWS
Grade II Listed Farmhouse – Halifax
HERITAGE WINDOWS
Millhouses – Sheffield
COLOURS AND GLAZING
Our aluminium profiles are polyester powder coated by our systems suppliers using the very latest paint application techniques guaranteed for 25 years.
Fully compliant to the latest June 2022 building regulations our standard double glazing is the exceptional light transmitting, energy saving ClimaGuard® A+ low emissivity (Low-E) glass manufactured by Guardian Glass.
Why choose Marlin?
Reasons why you should expect 100% satisfaction.
Quality Control
We believe that our quality standards are unrivalled. Our manufacturing processes and activities are monitored with well defined controls and inspection procedures are performed by trained personnel.
Care
We respect you, your property and your project taking care over each detail from order to delivery to your post installation satisfaction.
Project Focus
Your project is important to us. We manufacture to your made to measure requirements so that we get it exactly right. See example case studies of our project work.
Frequently Asked Questions
If you require any support, please don’t hesitate to review our FAQ’s below or drop us a message on our contact form here
What makes the Alitherm Heritage HISTORIC system suitable for historic buildings?
The Alitherm Heritage HISTORIC system features ultra-slim aluminium frames that closely mimic traditional steel windows, preserving the authentic look of historic properties while offering modern thermal efficiency and security.
Are these steel replacement windows energy efficient?
Yes, the system is designed to be highly thermally efficient, helping to reduce heat loss and lower energy bills without compromising on the slim, elegant frame design.
How secure are steel replacement windows?
The windows are built with robust aluminium frames and advanced locking mechanisms, providing enhanced security that meets modern standards while maintaining the traditional steel window appearance.
Come and explore…
Aluminium Bi-fold Doors, Sliding Doors, Contemporary Glazing, Aluminium Heritage Windows and Traditional Steel Replacement Doors
