Windows

Aluminium Windows by 3S Doors – Stylish, Durable, and Energy Efficient

At 3S Doors, we proudly supply premium aluminium windows from trusted brands like Cortizo and Smart, bringing you the perfect blend of modern design, outstanding durability, and exceptional performance. Whether you’re upgrading your home or fitting new builds, our aluminium windows deliver style and efficiency that stand the test of time.

Tailored Solutions for Every Home

Our aluminium windows come in a variety of configurations—casement, tilt & turn, sliding—and are suitable for both contemporary and classic homes. Whether you want to enhance natural light, improve ventilation, or add architectural flair, 3S Doors has the perfect aluminium window solution for you.

Why Choose 3S Doors Aluminium Windows?

Ultra-Slim Frames: Maximise natural light and panoramic views with sleek, minimalist profiles that elevate your home’s appearance.
Exceptional Security: Multi-point locking systems and security-tested designs offer peace of mind with enhanced protection against intruders.
Thermally Efficient: Advanced thermal break technology combined with double or triple glazing keeps heat inside and reduces your energy bills.
Weather Resistant: Aluminium frames resist warping, rust, and fading, maintaining their flawless look through every season.
Custom Colours & Finishes: Personalise your windows with a vast selection of RAL colours and dual-colour options for a perfect match inside and out.
Low Maintenance: Powder-coated finishes mean no painting required—just occasional cleaning to keep them looking pristine.
10-Year Guarantee: We stand behind our products with a comprehensive warranty for long-lasting confidence.

Product Brochure

View

Download

get quote

Aluminium Windows offered by 3S Doors

Cortizo Aluminium Windows

Experience superior quality with Cortizo’s innovative aluminium window systems, designed for maximum strength and aesthetic appeal. Their cutting-edge profiles offer excellent thermal insulation and weather resistance, ensuring your home stays warm and protected in all conditions.

Serving Homes Across London and Surrounding Areas

We supply and install Windows across North West London, Hertfordshire, and Buckinghamshire, including:

Stanmore, Harrow, Watford, Amersham, Chesham, Brent, Pinner, Gerrards Cross, Little Chalfont and nearby areas.

No matter the size or type of project, you can count on 3S Doors for expert advice, best-in-class products, and professional service from start to finish.

Smart Aluminium Windows

Smart’s aluminium windows combine sleek, ultra-slim frames with robust construction for a sophisticated finish. Choose from a wide range of styles, colours, and finishes — including the exclusive Smart Heritage Aluminium Windows collection, which perfectly complements traditional and period properties without compromising on modern efficiency.

Request a Free Quote or Consultation

Ready to upgrade your windows? Contact us today for a free, no-obligation quote or expert consultation. Call 02039165359 or fill out our online contact form. Experience the difference with 3S Doors—where quality meets style and security.

uPVC Windows by 3S Doors – Durable, Energy Efficient & Stylish

At 3S Doors, we offer a premium range of uPVC double glazed windows from leading manufacturers such as Deceuninck, REHAU, and Eurocell. Whether you want a classic look or a modern finish, our uPVC windows deliver exceptional thermal performance, durability, and security — perfect for homes across London and surrounding areas.

Why Choose Our uPVC Windows?

100% Recyclable & Eco-Friendly: Sustainable uPVC profiles that help reduce your carbon footprint.
Customisable Designs: Wide selection of colours, finishes, and styles.
Advanced Security: Multi-point locking systems and Secured by Design accreditation for your peace of mind.
Energy Efficient: Double glazing combined with thermally efficient profiles reduces heat loss and lowers your energy bills.
Low Maintenance: Durable uPVC frames resist fading, cracking, and warping — no repainting required.
Competitive Prices: Premium quality windows at affordable prices tailored to suit your budget.
Professional Installation: Expert fitting to ensure lasting performance and perfect aesthetics.
10-Year Guarantee: Comprehensive warranty for long-term reliability and satisfaction.

Window Styles We Offer:

Casement Windows – Classic and versatile.
Tilt & Turn Windows – Ideal for high-rise buildings, offering easy ventilation.
Sliding Sash Windows – Traditional timber-look with modern performance.
Flush Casement Windows – Elegant and timeless.
Bow & Bay Windows – Maximise natural light for a brighter space.