trade ALUK flush aluminium windows

Comparison of triple glazed and double glazed windows with U-values 1.2 and 1.4 respectively.
Black circle with the text 'PART L COMPLIANT' in white letters.
Black circular badge with white border and text reading 'Easy to Install'
Black circle with the words 'FLUSH OUTSIDE' in white text.
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Black circle with the text 'Free Delivery' in white letters, centered.

aluk flush aluminium WINDOWS

Our Aluminium Flush Casement Windows by AluK are the ideal solution for contemporary new builds and stylish refurbishments. Designed with impeccable flush detailing and ultra-slim sightlines, these windows add a modern, minimalist touch to any project.

With versatile sash options and a variety of configurations, the flush system allows for a clean, streamlined look that perfectly complements your design vision.

COLOUR OPTIONS

Solid dark green color
Plain white square image

White - RAL 9910hg

Anthracite Grey - RAL 7016m

expressionless face emoji on black background

Black - RAL 9005m

Diagonal black and white geometric pattern

Black / White

Abstract geometric design with dark and light areas

Anthracite Grey / White

Brick house facade with black-framed windows and wooden door, potted plants beside the entrance.

Why choose aluk flush casement?

- 3 Standard colours

- Single & dual colours available

- Modern flush casement design

- 70mm sash depth

- PAS 24 and Doc Q compliance options available

- U-Value as low as 1.2W/m²K

why the trade choose aluk

The AluK 58BW HI aluminium window range is a versatile, high-performance solution for new builds and refurbishments. Available in Flush Sash, Commercial Sash, and Contemporary Flat Sash designs, it offers clean lines, advanced functionality, and easy installation. With U-values as low as 1.2 W/m²K, deep leg frames for quick trickle vent fitting, and 78% recycled aluminium content, it’s a reliable, efficient, and sustainable choice for modern projects.

Large window with four sections on a brick wall overlooking an interior room with furniture and plants, partially obscured by curtains.
Exterior window view with light green frames, reflecting indoor furniture and decor, partially visible bookshelves, and a potted tree and flowers outside.

Colour

Available in three colours: white (RAL 9910hg), anthracite grey (RAL 7016m) and black (RAL 9005m).

design

With a 70mm depth and 53mm height, they blend seamlessly with existing windows - ideal for new builds and steel replacements

Large beige-framed window on a stone wall, reflecting interior with curtains and wall art.

configuration

Ultra slim & hardwearing, ALUK offers top hung, side hung, bottom hung, fixed light, and multi light configurations.

why the trade choose aluk

The AluK 58BW HI aluminium window range is a versatile, high-performance solution for new builds and refurbishments. Available in Flush Sash, Commercial Sash, and Contemporary Flat Sash designs, it offers clean lines, advanced functionality, and easy installation. With U-values as low as 1.2 W/m²K, deep leg frames for quick trickle vent fitting, and 78% recycled aluminium content, it’s a reliable, efficient, and sustainable choice for modern projects.

aluk flush aluminium frequently asked questions

  • Performance and accreditations

    U-Value (Double Glazing) 1.4 W/m2 k U-Value (Triple Glazing) 1.2 W/m2 k

    BRE Green Guide Rating - A Rated

    Air Permeability - Class 4 (600 Pa)

    Water Tightness - Class 9a (600 Pa)

    Wind Resistance - Class E2400 (2400 Pa)

    Security - Pas 24 & SBD When Specified

  • Frame Depths – Flush Sash 70mm

    Frame Heights – Flush Sash 53mm

    Security Compliance – PAS 24 / Doc Q / SBD upon request

    WER A – with Low Iron Glass and 43mm frame height

  • The ALUK lead time is around 2/3 weeks. Please note this is subject to change.

    It is always worth contacting our trade team directly.

Black-framed window in a half-timbered building with brick wall
Exterior view of a house window with reflective glass, beige frame, and stone wall background. The interior shows curtains, a sofa, and wall art.
Gable end of a house with black and white Tudor-style design
Modern window with two glass panes framed by a light green border, set in a white wall. A potted tree and purple flowers are in the foreground. Interior visible through the window includes a lamp and shelves.

aluk bw58 hi brochure

TECHNICAL SUPPORT

We’re committed to helping our trade partners win new business. As well as delivering high quality glazing products, for residential and commercial projects, we offer guidance, technical expertise and sales support.

From survey sheets to door adjustment tips, using our 30 years’ of knowledge, we’ll provide you with the tools necessary to deliver the best installation services possible.

Find what you’re looking for in our downloads section.