Our best-selling cost-effective triple glazed timber inward opening tilt and turn window. Uw value 0.85 W/m2K.
IV78
- Inward opening (outward opening also available)
- High performance triple glazing
- FSC® certified timber in redwood & oak
- FSC® certified Accoya timber drip rail for durability
- Alu-clad option available
- Dual compression seals for long-term airtightness
- Secured by Design option
- 78mm profile
- Made exclusively for Green Building Store by our partners in northern Europe
Installation Gallery
Timber Window Gallery
Alu-clad Window Gallery
Glazing & U values
Whole window U Value: Uw 0.85 W/m2K (Redwood)
Whole window U Value: Uw 0.94 W/m2K (Oak)
Glazing U value:: Ug 0.58 W/m2K
Triple unit: Argon fill 44mm
Light transmission value: 74.1%
Typical maximum sizes
Tilt & turn: 1300 mm X 2300 mm
Tilt only: 2000 mm X 950 mm or 1300 mm X 2300 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: 600 Pa Class 9A
Wind load BS EN 12210: 2400 Pa Class E2400
Exposure category BS 6375-1: 2400
* U values calculated for standard single window 1230 X 1480
Please see some sample styles below. If you can’t see the style you’re looking for, please get in touch, as everything we do is bespoke and made to your requirements.
Glazing Options
Redwood Colour Options
Oak Timber Stains
Handles
