PERFORMANCE outward opening casement window

Our best-selling cost-effective triple glazed timber outward opening casement window. Uw 0.85 W/m2K.


Glazing & U values

Whole window U value: Uw 0.85 W/m2K (Redwood)
Whole window U value: Uw 0.93 W/m2K (Oak)
Glazing Ug: 0.58 W/m2K
Triple unit: Argon fill 44 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: 750 Pa Class E750 (Top hung)

Water tightness BS EN 12208: 900 Pa Class E900 (Side hung)

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

Most handles are compatible with our windows and doors so if you are looking for something a bit different to what is shown please get in touch with the windows team and we will be able to find something to suit your needs.

Affiliations & Accreditations