
Collection: Alu-Clad Windows
Where natural warmth meets modern performance - without compromise.
Durable aluminium externally and naturally insulating timber internally combine to deliver hybrid properties which result in a thermally efficient, low maintenance and aesthetically pleasing product.
"Precision-engineered timber. Protected by aluminum excellence. Creating comfort that endures."
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Energy Efficiency
Thermal performance drives everything we do. Certified passive house performance with verified window U-values as low as 0.64 W/m²K.
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Superior Quality
Precision-engineered timber-aluminium composite windows specifically designed for passive house and ultra-low energy projects, with proven performance in certified developments.
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People & Expertise
Our team brings specialized passive house knowledge and certification experience, providing technical guidance that goes far beyond standard fenestration.
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Customer Service
Dedicated support throughout your passive house journey, from initial specification through certification completion, ensuring your project achieves its performance targets.
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Bespoke Products
Custom solutions for unique passive house challenges, engineered to eliminate thermal bridges while meeting your exact design and performance requirements.
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Specification to Installation
No distributors, no coordination headaches. Complete support from passive house specification to installation.
Our Alu-Clad Window Range
Our alu-clad windows unite premium laminated timber cores with high-grade powder-coated aluminum cladding, creating hybrid performance that surpasses any single-material solution.
Originally developed to enhance timber window longevity, today's advanced composite technology delivers benefits that transform how your home performs and feels.
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Outward Opening Alu-Clad Window (P11A)
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Outward Opening Timber Window (P11T)
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Outward Opening Timber Window (P13T)
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Outward Opening Alu-Clad Window (P21A)
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Outward Opening Timber Window (P21T)
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Outward Opening Alu-Clad Window (P31A)
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Outward Opening Timber Window (P31T)
Regular price £0.01 GBPRegular priceUnit price / per -
Outward Opening Alu-Clad Window (P32A)
Regular price £0.01 GBPRegular priceUnit price / per -
Inward Opening Alu-Clad Window (P33A)
Regular price £0.01 GBPRegular priceUnit price / per -
Inward Opening Timber Window (P33T)
Regular price £0.01 GBPRegular priceUnit price / per -
Outward Opening Alu-Clad Window (P41A)
Regular price £0.01 GBPRegular priceUnit price / per -
Inward Opening Alu-Clad Window (P44A)
Regular price £0.01 GBPRegular priceUnit price / per

Alu-Clad Doors
Complete your home's thermal envelope with doors that combine natural timber warmth and aluminum durability.
From impressive entrance doors to expansive sliding systems, our alu-clad doors deliver the same exceptional performance as our windows. Experience precision-engineered timber protected by virtually maintenance-free aluminum cladding - creating doors that operate effortlessly while maintaining their beauty and performance for decades.
Which windows are right for you?
Take our short survey to discover the perfect windows for your project.
Inspiration for your project
From heritage transformations to scandinavian-style passive houses, discover how Norrsken windows and doors transform exceptional homes into extraordinary spaces.
Whether it's converting industrial barns into a contemporary sanctuary or pushing the boundaries of sustainable design in passive houses, our projects span every architectural vision. See how our windows and doors brought your Norrsken neighbours' visions to life.
GALLERY
Advantages of Alu-Clad
If you are looking for windows that deliver enhanced durability, thermal efficiency and stylish aesthetics, with near zero maintenance requirements, then alu-clad windows could be the perfect choice for you.
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Maintenance
Unlike traditional timber windows, alu-clad windows require virtually no maintenance.
The timber is protected from the elements by the tough, powder coated aluminium, which only needs to be kept clean. This protection is indispensable, particularly for properties in coastal locations where marine grade aluminium is used.
Performance
In the thermal performance department, alu-clad windows are vastly superior to all-aluminium windows.
Wood, unlike aluminium, has a low thermal conductivity - it's around 800 times more effective as an insulator than aluminium. This makes the timber frame of an alu-clad window an excellent insulator. Additionally, although the aluminium cladding does not contribute to thermal performance in its own right, it can allow for the use of deeper glass units, further improving the performance of the window.
Sustainability
Made predominantly from timber, the manufacturing processes and waste materials of alu-clad windows are more environmentally friendly than those used for all aluminium or UPVC windows.
The sawdust produced from the production of our timber window frames, for example, is used to heat the factory. Additionally, the improved thermal efficiency of alu-clad windows can significantly contribute to a reduction in your home’s CO2 emissions and your heating bill.
Style
When choosing new windows, you want something that will complement the design of your property and enhance its overall look.
Our alu-clad windows come in a variety of styles and are available in a range of different profiles. They can be finished in any RAL colour and in dual colours, meaning that you can opt for one colour on the inside and a completely different colour on the outside. The aluminium provides a sleek, contemporary look externally, while the timber provides a warm, soft feel internally. Alu-clad windows are aesthetically pleasing and allow you to enjoy versatile design features both internally and externally.
Create Something Distinct
Every Norrsken order is unique. Beyond custom dimensions and precision manufacturing, we provide the design flexibility to perfectly express your vision.
From custom shapes and specialized hardware to powder-coated trims and distinct hardware - find the finishes you need, whatever your project specification.
OPTIONS

Colours & Finishes
Complete design freedom to perfectly match your architectural vision.
Choose from solid colours or natural finishes with dual-colour options available on virtually every product – select one colour externally and another internally using any RAL specification.

Handles & Hardware
Our curated hardware selection combines exceptional functionality with aesthetic flexibility.
While some components are product-specific for optimal performance, we offer extensive customization across styles, colors, and finishes.

Glass Options
Advanced glazing solutions engineered for optimal comfort and performance.
Our comprehensive glass selection provides complete flexibility including double and triple glazing, solar control, and obscure options. Glass delivers the highest insulation performance in any window - with proper specification, you can maximize beneficial solar gain while preventing overheating.

Marine Finish
Marine-grade finishing for projects within 1,500 meters of the sea, ensuring exceptional durability in challenging coastal environments.

Sills & Trims
Bespoke sills and precision trims for unique architectural features. Specialized solutions including steel beam coverings and complex junction details.
Your Questions Answered
Have a question? You're not alone. We've answered some of the most common questions about Alu-Clad Windows below, drawing from years of expertise helping homeowners and professionals achieve their vision.
Can't find what you're looking for? Email the team.
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What are alu-clad windows?
Alu-clad timber windows are made from engineered timber clad externally in powder-coated aluminium cladding.
These windows combine the excellent insulation properties, durability and charm of timber with the low maintenance needs of aluminium. As a result, they are some of the most attractive and best quality products on the market.
Are alu-clad windows expensive?
Alu-clad windows tend to be more expensive than all timber versions and uPVC models.
They offer a wider range of benefits including better thermal performance, aesthetic appeal, a longer lifespan, use of more environmentally friendly materials and lower maintenance. They are certainly the smarter choice for a well-insulated home in the long run.
What are the benefits of alu-clad windows?
Aluminium clad windows are durable and provide excellent insulation thanks to the timber frames.
The aluminium cladding protects the window from weather damage and decay, ensuring a long lifespan of low-maintenance, dependable performance. As a result, they are some of the most attractive and best quality products on the market.
Can alu-clad windows be painted?
Our aluminium-clad windows can be finished in any RAL colour with a powder-coated finish.
Dual colour finish - different colours inside and out - is available as standard, so there is no shortage of options when choosing the colour of your windows! Internally the windows can be repainted later if desired.
Are alu-clad windows better than uPVC?
Alu-clad timber windows are much better at insulating - so offer better thermal performance - than most uPVC windows and have a much lower embodied carbon footprint.
They also last longer, have more aesthetic appeal and are more likely to add value to the property, although they tend to cost more.
(Source: Researchgate)
Are alu-clad windows better than wood windows?
Aluminium-clad timber windows provide all the same benefits as wood windows - exceptional thermal performance, charming interior style, durability - with the extra benefit of being more weather resistant thanks to the protective layer of aluminium.
However, if traditional style is first priority then wooden window frames provide a more classic look.
Are alu-clad better than aluminium windows?
While aluminium frames are strong and light, aluminium is a very poor insulating material - over 1000 times worse than wood.
Even with multi-chambered extrusions and thermal breaks, aluminium still performs much more poorly than timber as a frame material. Aluminium also has higher environmental impacts and higher embodied carbon.
Helpful Resources
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Telegraph Home of the Year
Award-winning extension features stunning Norrsken windows, earning praise in the Telegraph.
Telegraph Home of the Year
Award-winning extension features stunning Norrsken windows, earning praise in the Telegraph.
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Norrsken reimagined
Step into our showroom: a crafted space that brings our triple and double glazing to life.
Norrsken reimagined
Step into our showroom: a crafted space that brings our triple and double glazing to life.
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Cricket pavilion restored with alu-clad glazing
The Newbery Steps pavilion transformed into a vibrant space with alu-clad windows by Norrsken and partners.
Cricket pavilion restored with alu-clad glazing
The Newbery Steps pavilion transformed into a vibrant space with alu-clad windows by Norrsken and partners.
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From cow shed to beautiful coastal retreat
A coastal sanctuary with stunning glazing - See how this transformation blends style and performance.
From cow shed to beautiful coastal retreat
A coastal sanctuary with stunning glazing - See how this transformation blends style and performance.
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How can we help?
Transform your vision into reality with Norrsken's bespoke, energy-efficient windows and doors. Start something great today.
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