W23 – Dual-Opening Casement Window
Upgrade your home with the elegant and functional W23 white uPVC casement window, expertly crafted to offer both ventilation and style. This design features a 4-pane configuration, with two vertical sections. On the left side, the top pane opens outward from the top, and the bottom pane opens from the left, allowing controlled airflow and easy operation. The right side remains fixed, providing uninterrupted views and increased thermal efficiency.
Made from premium-grade white uPVC, this window combines durability, low maintenance, and energy efficiency, with clear double-glazed glass to enhance insulation and soundproofing. Its modern, bevelled frame ensures a crisp finish that complements any property exterior.
✅ Features:
Left-side top pane: Top-hinged, opens outward
Left-side bottom pane: Side-hinged (left), opens outward
Right-side panes: Fixed
Clear double-glazed safety glass
Weather-sealed white uPVC frame with mitred corners
Square, balanced design for modern and traditional homes
| Name / Location: Custom |
| Reinforcing Rule: Fully Reinforced |
Website URL:
/shop/w23-dual-opening-casement-window-370
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For precise window measurements, it is essential to measure from the exterior brickwork opening of the property, utilizing millimetres (mm) as the standard unit.
Commence by measuring the width from brickwork to brickwork at three distinct locations (top, middle, and bottom) and subsequently deduct approximately 10mm from the smallest measurement recorded.
Following that, accurately measure the height of the opening at multiple locations and subtract approximately 10mm from the smallest measurement obtained. In instances where a metal lintel is present, please exclude it from your calculations. Typically, windows are installed on a cill; therefore, measure from the underside of the existing cill unless it is a non-removable feature, such as stone.
