Timber Casement window


The timber casement is the most common of all UK windows. Used across all market sectors our window has a number of improvements built in to the design as standard. Available in both flush and lipped (stormproof) styles for all window configurations.

We are able to offer you an extensive range of styles – from traditional Georgian to the more contemporary non-bar styles.

Wood is still the best material for manufacturing windows, with its durability, thermal transmittance performance and warm, timeless beauty.



Pine wood

Pine - preferably selected raw material for production of windows. Pine has a bright fresh colour, durability, excellent resistance to weather conditions and excellent thermal and acoustic insulation. Accessible, easy to handle and cost-effective. It is recommended for customers who value traditional solutions and economical use.


Pine wood

Meranti - this exotic species of hardwood timber from Indonesia has extremely high resistance to weather conditions. The windows made of this material are not only durable but also very warm and quiet. Meranti wood density strongly depends on the species and can range from 300 kg/m3 to 1050 kg/m3. It is recommend for places exposed to moisture. In windows and doors production most commonly used meranti is the one with a density above 450 kg / m3, which ensures consistent quality of the final product.


Pine wood

Oak - is the best building material out of native broadleaved trees, better than pine or even larch. Oak wood is hard, very durable and resistant to abrasion. It is characterised by high durability and resistance to changing moisture conditions. It has been widely appreciated all around the world for centuries.


View our timber casement windows specification and options


Single frame construction, a three-ply square timber, joined at the length. Frame thickness 68mm. Any shape and size of the window available.


Double glazing unit - 4/16Ar/4 – single chambered system.

Thermal insulation glass of Ug = 1.1 W/m2k.

Inter-pane space is filled with argon gas.

The possibility of obtaining heat transfer coefficient up to 0,7 W/m2k.

Choice of any glass panes with maximum thickness up to 40mm.

Distance frame is offered as standard.

Extra insulation frame matching window colour is also available.


Thermal transmittance for window 68 mm profile:

The heat transfer coefficient Uw ranges from 1,31 to 1,42 W/m2K.

Standard multi point G-U fittings with micro ventilation and anti-burglar catch.

Optional fittings with extra safety class are available:

RC 1 - minimum of four anti-forcing catches in a window,

RC 2 - all anti-forcing catches applied in a window.

Optional use of sash turn limiter, limited tilt, a balcony latch.

Opening methods:

R (turn), U (tilt), RU (tilt and turn).

Coating colours from RAL palette or azure colour (emphasizing wood structure) from a catalogue of transparent colours.

The same colour from the inside and outside as standard.

A four-layer coating system: impregnation and triple painting.

We use two seals Q-LON (inside and outside applied) as standard. The core is made of polyurethane foam, outer coating of polyethylene is weatherproof, resistant to UV radiation and pollution. Compatible with cleaning agents.

Available colours are brown, white, black, grey, beige, light oak and chestnut.

SECUSTIK® handles of HOPPE company are available in colours: white (F9016), brown (F8077), silver (F1), antique gold (F4), titanium (F9).

Optional: A handle with a key or a button in colours: white (F9016), brown (F8077), silver (F1), antique gold (F4), titanium (F9).

Casement Flush

The FLUSH CASEMENT is specifically designed to replicate a period window whilst incorporating the latest modern operation and security features. Often referred to as a conservation window, the design is characterised by a sash that sits within the frame to create a flush finish externally.

Casement Stormproof

The outward opening STORMPROOF CASEMENT is the most frequently chosen timber window design in the UK. The profile is reflecting a proven ability to withstand exposure to adverse weather conditions. Internally glazed with a modern concealed multi point locking system the design provides high security features compliant with Secured by Design conditions. The sash stands proud of the frame giving excellent gasket compression and the best weather rating available.