Close-up of a sliding glass door frame with metal rails and black handles, partially opened, against a white background.

Close-up of a sliding glass door frame with metal rails and black handles, partially opened, against a white background.

Black-framed double-pane window set in a white wall with a windowsill.

Black-framed double-pane window set in a white wall with a windowsill.

Four different colored window frames stacked in front of a plain background.

Four different colored window frames stacked in front of a plain background.

Exterior view of a brick house with large bay window showing a dining area inside with a table, chairs, a floor lamp, and plant decorations.

Exterior view of a brick house with large bay window showing a dining area inside with a table, chairs, a floor lamp, and plant decorations.

A modern, black metal-framed, glass door cabinet with two doors, open to reveal an empty interior, set against a dark gray background.

A modern, black metal-framed, glass door cabinet with two doors, open to reveal an empty interior, set against a dark gray background.

A black framed glass door with a metal handle, set against a plain white background.

A black framed glass door with a metal handle, set against a plain white background.

A black framed window with a double-hung top sash and a single casement bottom sash, with a handle on the bottom sash.

A black framed window with a double-hung top sash and a single casement bottom sash, with a handle on the bottom sash.

 JMJ Aluminium Window Collection

Light, performance & precision — built to last

At JMJ Aluminium, our window collection is designed to combine modern engineering with timeless style. Whether you want ultra-slim sightlines to maximise light or a traditional flush casement for a classic look, every JMJ Aluminium window is bespoke, secure, and crafted to perform for decades.

Slimline Windows (OW-70)

Soho Style
Contemporary Style

Our Slimline Window is the ideal choice when glass and light take centre stage. With a frame depth of just 65mm and sightlines as little as 38.5mm, it delivers maximum glazing area without compromising on strength.

Features:

  • External flush casement design for a clean, modern look

  • U-values as low as 1.2 with triple glazing

  • PAS 24 & Secured by Design accredited for security

  • Multi-point locking with slim, precision handles

  • Bespoke sizes, including casement, picture, bay and gable options

Premium Flush Windows (OW-80)

Our Premium Flush Window blends elegance with performance. Featuring both internal and external flush casement lines, it delivers a truly timeless look, perfect for modern homes, traditional properties, or even conservation areas.

Features:

  • Internal & external flush finish for a seamless shadow-line design

  • Exceptional thermal efficiency with triple weather seals

  • Optional Aerogel thermal upgrade, achieving U-values down to 0.8

  • Wide range of configurations including French windows and bi-folding windows

  • Yale Encloser lock system with bi-directional compression cams for weather sealing & security

Window Types & Configurations

Every JMJ Aluminium window is made to measure, with flexible designs to suit any space. Options include:

  • Casement windows: side-hung, top-hung, or dummy sash

  • Picture / fixed frames: ultra-slim frames for maximum light

  • Bay windows: projecting designs that add depth and character

  • Gable windows: striking architectural feature windows

  • French windows: full-opening designs with a moving mullion

  • Bi-folding windows: folding configurations for kitchens and serving spaces

Customisation:

  • Over 150 RAL colours (matt, satin or gloss finishes)

  • Dual-colour frames available (different inside & outside colours)

  • Choice of handle styles in stainless steel, metallic, or colour-coded finishes

Security & Safety

Security is engineered into every JMJ Aluminium window:

  • PAS 24 certified and Secured by Design accredited

  • Multi-point locking systems (Nemesis lock for Slimline, Yale Encloser for Premium)

  • Hinge guards, crimped frames and night vent function for secure ventilation

  • Optional restrictors for controlled opening angles

  • Finger-safe gaskets and family-friendly safety features

Thermal Performance

View of a bay window with a gray frame on a brick house, showing a dining room inside with a table, chairs, lamp, and large indoor plants.

Our advanced thermal breaks and weather seals ensure JMJ Aluminium windows keep your home comfortable year-round.

  • OW-70: U-values as low as 1.2 with triple glazing

  • OW-80: Exceptional efficiency with triple weather seals

  • Aerogel upgrade available: certified U-values as low as 0.8

  • Reduced energy bills and improved comfort in all seasons

Colours & Finishes

With more than 150 RAL shades available, our window collection can be tailored to your style:

  • Single or dual-colour frames

  • Matt, satin or gloss finishes

  • Woodgrain effects for a warmer aesthetic

  • Powder-coated aluminium for durability and low maintenance

Why JMJ Aluminium Windows?

  • Designed for strength, slim sightlines and timeless looks

  • Built from premium aluminium — lightweight, strong and recyclable

  • Low-maintenance finish with long-term durability

  • Backed by up to 20-year guarantees

  • Always bespoke, always crafted to your project

Upgrade Your View with JMJ Aluminium

Our aluminium windows combine style, performance and security — designed around your home and your lifestyle.

Modern house with wooden exterior, large glass sliding doors, and a patio with a swimming pool.

Modern house with wooden exterior, large glass sliding doors, and a patio with a swimming pool.

Close-up of modern window with multiple panels, showing brick wall outside and greenery in the background.

Close-up of modern window with multiple panels, showing brick wall outside and greenery in the background.

JMJ Aluminium Door Collection

Crafted for strength, style & everyday living

At JMJ Aluminium, we create doors that transform spaces. Every product in our collection is built from premium-grade aluminium, designed to maximise light, enhance security, and deliver flawless performance for decades. Whether you’re opening up an entire wall with a bi-fold, sliding effortlessly into your garden, or upgrading your main entrance, JMJ Aluminium doors are tailored to your project and your lifestyle.

Bi-Folding Doors

View of a backyard patio through large glass sliding doors, with outdoor furniture, potted plants, and a grassy area under a sunny sky.

Our bi-folding doors are designed for seamless inside–outside living. Available in two slim profiles, they combine sleek looks with precision engineering.

  • 49mm slimline profile for maximum glass and modern styling

  • 72mm profile for a classic look and enhanced strength (up to 12 panels)

  • Smooth glide system for effortless operation

  • Corner bi-fold options for panoramic openings

Customisation:

  • Over 150 colour finishes (including dual-colour frames)

  • Choice of thresholds: weathered, non-weathered, or mobility access

  • Configurations from 2 to 12 panels

  • Optional glazing bars, mid-rails, or partial panels

Performance:

  • Certified U-values as low as 1.1 with triple glazing

  • Advanced weather seals for year-round comfort

  • Ultra-secure 8-point locking system

Sliding Doors

For uninterrupted views and effortless movement, our sliding doors combine slim frames with large glazed panels. Available in a range of sightlines to suit your project.

  • Ultra-slim 20mm sightline option for maximum glass

  • Mid-slim 29mm or 44mm frames for a balance of strength and style

  • 77mm classic frame for traditional aesthetics and larger sizes

  • Double or triple track options for flexible openings

Features:

  • Panels up to 3 metres tall

  • Effortless glide system with precision rollers

  • Strong aluminium construction with thermally broken frames

Performance:

  • PAS 24 security-tested multi-point locks

  • Excellent thermal efficiency with double or triple glazing

  • Smooth, quiet operation for everyday use

French Doors

Empty room with gray walls and wooden flooring, featuring large glass double doors leading to a lush garden with trees and a lawn.

Classic double-door styling, engineered in modern aluminium. Our French doors combine elegance with performance, making them perfect for patios, balconies, or side entrances.

  • Available as standalone doors or with side panels

  • Inward or outward opening options

  • Choice of mobility thresholds for step-free access

  • Configurations from 936mm to 2,536mm wide and up to 3,000mm tall

Benefits:

  • Strong aluminium frames, powder-coated for durability

  • Custom colours and finishes to match the rest of your home

  • High-security hinges, locks and cylinders

Residential Entrance Doors

Front view of a modern gray metal apartment door with a handle, mail slot, and a peephole, surrounded by side glass panels.

Our residential doors are built for everyday use — secure, energy efficient, and completely bespoke. Choose from fully glazed designs or solid aluminium panels, tailored to your property.

  • Thermally efficient aluminium skins with insulating core

  • Wide choice of styles: modern, traditional, or custom

  • Panel designs including solid, glazed, or split rails

  • Premium hardware with multiple handle and lock options

Benefits:

  • Built for strength, with high-grade aluminium

  • Low-maintenance powder-coated finish

  • Multi-point locking systems with 3-Star Diamond cylinders

Colours & Finishes

With over 150 RAL colours to choose from, you can tailor every detail.

  • Dual-colour frames available (different inside/outside shades)

  • Finishes in matt, satin, or gloss

  • Woodgrain effects available for a warmer look

  • Powder coating ensures resilience and longevity

Hardware & Accessories

The finishing touches matter. Every handle, hinge and lock in our collection is engineered for strength, tested for durability, and styled to complement your doors.

  • 8-point locking system with deep-throw security hooks

  • Choice of stainless steel or colour-matched handles

  • Finger-safe gaskets for family safety

  • Optional bar handles, D-handles and custom hardware

Performance & Security

JMJ Aluminium doors are designed for everyday living without compromise.

  • Certified to PAS 24 and available with Secured by Design specification

  • Advanced weather seals and thermal breaks

  • U-values as low as 1.1 with triple glazing

  • Up to 20-year guarantees on parts

Bring Light & Security to Your Home

JMJ Aluminium doors are crafted for strength, style, and performance — designed to last and tailored to you.