D Glass Aluk Optio 58BW TBT Tilt Before Turn Window

Aluk Optio 58BW TBT Tilt Before Turn Window System:

Product Description.

Innovative, versatile, intelligent. Offering exceptional child safety and seamless operation, our tilt before turn windows are an ever-popular choice with homeowners. Made from high performance aluminium these sustainable systems are inherently strong and lightweight, making them ideal for both commercial and residential designs.

Design Features:

Certified under the Secured By Design scheme.

Tested to PAS 24.

Green guide rated A.

Integrated deep head profiles for ease of trickle ventilation.

Unique polyamide thermal break design to improve thermal performance.


Glazing 24mm – 40mm.

Available in a range of single or dual colour and anodised finishes.

Available in the following aesthetics: Bay and Contemporary.

Available in the following configurations: tilt-beforeturn, side hung and multi-light.

Available for Lifetime Homes (LFT).


U value W/m²K (Double glazing).                                                1.5 W/m²K

U value W/m²K (Triple glazing).                                                   1.3 W/m²K

Window energy rating.                                                                 B - C

BRE Green Guide rating.                                                              A Rated

Acoustic performance (dB).                                                         Rw (C;Ctr) 44 (-1;-4) dB

Air tightness (Pa).                                                                          Class 4 (600 Pa)

Water tightness (Pa).                                                                    Class 8a (450 Pa)

Wind load (Pa).                                                                              Class E2400 (2400 Pa)



Secured by design


Glazing options.                                                                             Internal and external

Glazing thickness.                                                                          24mm - 40mm

Sightline (Frame to Vent).                                                             86mm

Sightline (Vent to Mullion).                                                          100mm

Sightline (Fixed Light).                                                                  43mm

Aluk Optio 58BW Tilt Before Turn  System

Aluk Optio 58 BW Tilt Before Turn Contemporary Cill Detail

Aluk Optio 58 BW Tilt Before Turn Cotemporary Transom Detail