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A fusion of heritage charm and modern innovation.
At the intersection of classic design and cutting-edge performance, aluminium heritage windows and doors offer the perfect solution for period property restorations, conservation area developments, and character-rich new builds. They bring together the enduring elegance of traditional steel-framed windows with the durability, thermal efficiency, and low maintenance benefits of modern aluminium.
Whether you’re restoring a Victorian townhouse, renovating a listed Georgian manor, or designing a contemporary home inspired by the past, our aluminium heritage range preserves architectural authenticity without compromise.
Experience the perfect fusion of heritage aesthetics and modern performance with IsoForm 3100, meticulously crafted by JSP Aluminium. Engineered to excel in heritage applications, this window and door solution redefines elegance and functionality for listed building renovations and large-scale replica refurbishment projects.
Our aluminium heritage windows and doors feature innovative thermal break technology, customisable designs, and certified security, IsoForm 3100 elevates heritage projects to new heights.
Traditional steel windows have long been admired for their slender sightlines, understated detailing, and timeless charm. However, original steel frames often suffer from poor insulation, rust, and costly upkeep. Our aluminium heritage windows and doors replicate that classic aesthetic—with none of the drawbacks.
Each unit is expertly crafted using thermally broken aluminium profiles that mirror the narrow lines of traditional steel while delivering superior energy performance and security. You get the visual appeal of heritage design, updated for modern standards in comfort and efficiency.
Conservation areas and listed buildings demand sensitivity to architectural heritage. Planning authorities are often reluctant to approve changes that would alter a building’s historic character. That’s why our aluminium heritage collection is designed with authenticity at its core.
From putty-line profiles and stepped frames to authentic glazing bars and traditional hardware, every detail echoes the craftsmanship of original metal windows. With heritage aluminium, you can satisfy conservation requirements while introducing the benefits of double glazing, improved weather performance, and enhanced sustainability.
Whether you’re working with architects, conservation officers, or property developers, our windows and doors help secure approvals—while enhancing the life and value of the building.
Heritage-inspired Design, Unmatched Performance: IsoForm 3100 pays homage to the timeless elegance of heritage architecture while offering cutting-edge performance. Designed as a series of horizontal modules, these aluminium heritage windows and doors seamlessly stack using horizontal couplers to create multi-part configurations, complete with specially designed drip bars between modules for added authenticity.
Innovative Thermal Break Technology: At the heart of our aluminium heritage windows and doors lies JSP’s innovative polyamide thermal break technology. This revolutionary feature creates a barrier between the elements, significantly reducing thermal transmittance and enhancing the overall energy efficiency of the product. IsoForm 3100 is meticulously engineered to meet the rigorous requirements of Document L 2010, ensuring optimal thermal performance in any environment. As low as 1.4 U Values.
Tailored Solutions for Every Vision: Our aluminium heritage windows and doors offers a wealth of customisation options to suit your project’s unique requirements. Choose from a range of standard or non-standard colors, including metallic, dual-color, JSP Beauty textured, and Etched anodised effect finishes. With flexibility in design and functionality, IsoForm 3100 is the perfect solution for heritage projects seeking both authenticity and innovation.
Certified Security and Performance: Our aluminium heritage windows and doors are rigorously tested to meet industry standards, including PAS 24:2016 for casement windows and fixed lights. Weather-tested to BS 6375 Part 1:2009 and boasting British Standard Kitemarks KM 81543 and KM 81580, IsoForm 3100 offers unmatched security and durability. From fixed windows to tilt-turn and side-hung casements, IsoForm 3100 delivers superior performance with a range of hardware options, including 316 Marine Grade Stainless Steel and heritage-inspired designs.
Sustainable Materials: Aluminium is 100% recyclable and offers an excellent life cycle value. Our windows are manufactured using environmentally conscious methods with long-term performance in mind.
Durable and Weather Resistant: Built to withstand the harshest weather conditions, our heritage aluminium systems exceed performance expectations for air, wind, and water resistance.
We offer a broad range of heritage aluminium options, tailored to suit every application and architectural requirement:
Side Hung Casement – Ideal for symmetrical facades and traditional aesthetics.
Top Hung Casement – Common in mid-century or art deco refurbishments.
Fixed Panels – To allow maximum light in while maintaining sightlines.
Multi-Part Assemblies – Combine fixed and opening sections for grander proportions.
Single Heritage Doors – Perfect for side or garden access with refined, narrow framing.
French Doors – Classic charm meets modern functionality; ideal for patios, garden rooms, or internal divisions.
Industrial-Style Screens & Partitions – Great for open-plan interiors looking for zoned spaces with character.
All configurations can be fitted with double or even triple glazing, acoustic-rated glass, and various security-enhancing options.
| Feature | Aluminium | uPVC | Timber |
|---|---|---|---|
|
Lifespan |
30-40 years |
15-20 years |
10-15 years |
|
Maintenance |
Low |
Moderate |
High |
|
Eco-Friendly |
100% Recyclable |
Limted |
Depends on Source |
|
Aesthetic Value |
Sleek & Modern |
Basic |
Classic & Traditional |
Colour: Ral Colour + Anodised
Material: Aluminium
Width (Window): Bespoke
Side Hung
Top Hung
Height (Window): Bespoke
Width (Door):
Height ( Double and Single Door):
Window Sizes
Door Sizes
Window Features
Door Features
When it comes to merging traditional aesthetics with 21st-century performance, nothing compares to aluminium heritage windows and doors. They offer a unique solution for discerning clients who value both design integrity and modern-day comfort.
With our expertly engineered profiles, commitment to quality, and flexible design solutions, you’re investing not just in a product – but in a legacy of enduring style and performance.
Let’s help bring your vision to life. Whether you’re in the early planning stages or ready to order, our specialists are on hand to guide you through design options, technical specifications, and installation advice.
Contact us today to request a quote or speak with one of our heritage experts.
All Images Are For Illustration Purposes Only
Tel: 020 8902 1122
Email: sales@jspaluminium.com
Address: Unit 8, Byfleet Industrial Estate, Old’s Approach, Watford WD18 9TS.
Tel: 020 8902 1122
Email: sales@jspaluminium.com
Address: Unit 8, Byfleet Industrial Estate, Old’s Approach, Watford, Hertfordshire, WD18 9TS.
