Optio 58BW TBT tilt-before-turn




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)
  Outward opening
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)
Security PAS 24 : X
Certifications : Q-mark
Secured by design : X
Opening : Open in
Tilt & turn : X
Side hung : X
Fixed Light : X
Multi light : X
Size limits
Top hung (max weight) : 100 Kg
Side hung (max weight) : 100 Kg
Fixed light (max weight) : 250 Kg
Frame depth : 58mm and 70mm
Dual color option : X
Multi-point locking : X
Glazing options : Internal and external
Glazing thickness : 24mm - 40mm
Sightline (Frame to Vent) : 86mm
Sightline (Vent to Mullion) : 100mm
Sightline (Fixed Light) : 43mm
Bay : X
Contemporary : X