PROGRESSION triple glazed timber window with new GRP cladding profile

Passivhaus certified triple glazed timber inward opening window,  with minimalist ‘frameless’ appearance and low maintenance design. Uw 0.68 W/m2K.

  • Timber frame with insulated frame
  • Contemporary ‘frameless’ appearance, with narrow sightlines
  • Inward opening with tilt & turn options
  • Ultra low maintenance GRP on exterior facings as standard*
  • Passivhaus certified A-rated component (both Thermowood and GRP cladding versions).
  • Dual compression seals for long-term airtightness
  • Manufactured by Slavona in the Czech Republic
  • Exclusive to Green Building Store in the UK

*Alternatively Thermowood cladding also available

Glazing & U values
Whole window U value: Uw 0.68 W/m2K
Standard glazing U value: Ug 0.53 W/m2K (g value 0.50)
High g glazing U value: Ug 0.62 W/m2K (g value 0.62)

Affiliations & Accreditations