With smooth lines, our traditional flush timber casement windows sit beautifully in the frame. But they offer more than sleek aesthetics – they are Secured By Design (SBD) certified too.

Our flush casement timber windows open outwards and can be top or side hung. They can also be supplied fully reversible to enable external glass to be cleaned safely from inside the building: perfect for high-rise developments.

We offer four glass options mounted in hardwood of softwood frames. Double and triple glazing is available, and the Uw rates for thermal containment will impress. With double gasketing, weather containment is assured; and beading is mounted internally to enhance security.

For casement windows for listed building, please browse our heritage windows and doors.


Product guidance - As Standard
Frame 56 x 90 mm - Standard. Manufactured using mortise and tenon joints, glued and mechanically fixed.
Sash 46 x 68 mm - Standard.
Sill Projection 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm
Wood moisture content 12-19%.
Glazing beads Internally Beaded.
Product specification
Material Engineered redwood - Standard. Engineered hardwood, Accoya, European oak.
Finish Three coat spray applied factory finish using water based micro-porous paint/ stain.
Colour White - RAL 9016 - Standard. Any RAL - from RAL classic range. Stain - from TRC stain range.
Glazing Double sglazed, 4/16/4 Low-E – Standard.
U-value 1.2 W/m²K double glazed – 0.8 triple glazed W/m²K.
Perimeter spacer bars White warm edge perimeter spacer with white warm edge integral spacers - Standard. Silver and Black spacer optional.
Frame profile moulding Ovolo 22mm, Ovolo 18mm, Lambs Tongue 22mm, Lambs Tongue 18mm.
Trickle ventilation Through sash head trickle ventilator. EA 1700, 4400, 5000 mm²
Security Can conform to PAS 24
CAD Drawings
Traditional Flush Casement Timber Windows
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