Triple glazed timber outward opening casement window (98mm profile), with Passivhaus-certified insulated frame option. Uw 0.75 – 0.68 W/m2K
OUT98
- Outward opening (inward opening also available)
- High performance triple glazing
- Passivhaus certified insulated frame option
- FSC® certified timber in redwood & oak
- FSC® certified Accoya timber drip rail for durability
- Dual compression seals for long-term airtightness
- Secured by Design option
- 98mm profile
- Made exclusively for Green Building Store by our partners in northern Europe
Installation Gallery
Window Gallery
Window style options (many others available)
Glazing & U values
Solid frame:
Whole window U value: Uw 0.75 W/m2K (Redwood)
Whole window U value Uw 0.83 W/m2K (Oak)
Insulated frame:
Whole window Uw 0.68 W/m2K (Redwood – Passivhaus certified)
Whole window Uw 0.72 W/m2K (Oak)
Glazing U value: Ug 0.52 W/m2K
Triple unit: Argon fill 52 mm
Light transmission value: 74.1%
Typical maximum sizes
Fixed light: 2500 mm x 2500 mm
Side hung: 950 mm x 1520 mm
Top hung: 1300 mm x 1650 mm
Please note: For Part Q and Secured By Design items, there may be size restrictions. Please get in touch to discuss.
Test results
Air Permeability BS EN 12207: 600 Pa Class 4
Water tightness BS EN 12208: 1500 Pa Class E1500 (Top hung)
Water tightness BS EN 12208: 600 Pa Class 9A (Side hung)
Wind load BS EN 12210: 1600 Pa Class C4 (Top hung)
Wind load BS EN 12210: 2400 Pa Class CE2400 (Side hung)
Exposure category BS 6375-1: 1600 (Top hung)
Exposure category BS 6375-1: 2400 (Side hung)
* U values calculated for standard single window 1230 X 1480
Glazing Options
Redwood Colour Options
Oak Timber Stains
Handles