Ecomerchant Traditional Lipped Casement Timber Windows

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Quick Overview

Traditional styling with modern energy efficient performance

The Traditional Lipped Casement is an outward opening timber window with distinctive traditional features including internal Ovolo mouldings, external putty bead design and authentic ironmongery.

Designed to suit new build or refurbishment where a high performance window with a traditional wooden appearance and sympathetic stain (or paint) finish is required.

Ecomerchant  Traditional Lipped Casement Timber Windows

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Traditional Lipped Casement windows are available in top and side hung styles and feature Egress friction hinges opening to 90 degrees as standard to facilitate fire escape and offering an easy clean facility.

The Traditional Lipped window design is ideal for properties where extra protection from the elements is required due to its ability to withstand adverse weather conditions. All Ecomerchant  Wooden Traditional Lipped Casements are manufactured with enhanced security features in accordance with British Standards (BS7950) and are approved by English Heritage and conservation officers across the UK

A popular specification chosen to complete the traditional look is a cream coloured paint finish, Satin Chrome Bulb end Ironmongery and cottage or Georgian Style 25mm bars. Ecomerchant can also offer a selection of traditional Farrow and Ball paint colours and various leaded glass designs.


Both the glass and frame are taken into consideration when calculating the U-Value the value for the Ecomerchant Traditional Lipped casement window is   1.37W/m2K

The above U-Value is achieved with standard soft coat low 'E' argon filled double glazed units, giving the Ecomerchant product a centre pane U-Value of 1.0W/m2K. The Low-E coating is microscopically thin and has optically transparent layers of silver, sandwiched between layers of metal oxide coating. This specific process is known as 'sputter coating' and is also referred to as soft coating.

The Low-E coating allows most natural light to enter freely but reflects a significant portion of shortwave heat energy. In summer, long-wave heat energy radiating from objects is reflected back outside, lowering cooling costs. In contrast, in winter, internal long-wave heat energy is reflected back inside, thus lowering heating costs.

In relation to the Low-E coating the double glazed units are gas filled to improve the glazing properties further. Filling the pane space with gas minimizes the convection current within the space, as the gas achieves excellent insulation levels. As a result the glazing will achieve an overall reduction of heat transfer between the internal and external areas of the property. As standard argon gas is used in Ecomerchant's double glazed units achieving the above U-Values, however depending on your project you may need to achieve a lower U-Value and Ecomerchant offer a range of solutions to increase your fabrics insulation efficiency.

Warm Edge Spacers.

Thermal bridging is a major factor to losing heat through windows/doors and can be found inside insulating glass units which incorporates traditional metallic spacers. Ecomerchant offer a range of warm edge spacers that have a thermal conductivity of 0.19W/m2K, which is 1,052 times less than the thermal conductivity of Aluminium.

This recent generation of insulating glass spacers, thermally break the insulating glass edge and create a 'warm edge', reducing condensation and keeping more heat inside your home.







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Product information - Standard Design Features

24mm Glazing Unit

The optimum thickness of unit for thermal efficiency. This is the overall width of the glass unit.

Anti Prise Clips

Fixed to the middle of sashes and frames, these are for enhanced security

Anti Warp Clips

Fixed to the top and bottom of sashes and frames, these are an enhanced security device.

Complete Gasket Seal

Gaskets around sashes and frames ensure weather tight seals. It compresses when handles engage and windows are shut.

 Traditional Range Features

External Putty bead design

Our purpose made external mould detail has been designed to give the impression of an external putty bead with its angle and shadow groove. Importantly security has not been compromised with internal beading being retained.

Hidden Silicon

Our silicone design takes into account the need for improved energy efficiency whilst retaining period aesthetics with only a discrete silicone bead surrounding the glass units.

Internal Ovolo mouldings on sash and frame

These add another important aesthetic feature with their elegant profiling.

Night Vents

A device with a secondary keep position for locking cams. Allows windows to be ajar whilst still locked.

Slim Frame Sections

In order to optimise glass areas and to retain period styling, The Traditional Range utilises slim frame sections.


These form no specific function, and are for aesthetic purposes only to promote the traditional looking design.

Various cill depths including sub cill option

The ability to vary cill depths as well as an extension has been incorporated into the design.

In addition to the ‘standard;’ and ‘traditional’ features available on this product range, the following ‘optional’ features listed below can be incorporated.

Please call us if you require any of these features.

Angled windows

ideal for screens and atriums for modern architectural designs.

Arched Head

A gothic arched effect common on older buildings and barns

Concealed Restrictor

Ironmongery fitted to the sash and frame which enables constraint on the opening of the window

Curved Head

A curved or rounded effect on windows, bullseye and oval windows are variant of the same theme.

Flying Mullion

On two light narrow windows where fire escape is required, the mullion is fitted to the sash allowing maximum clearance.

Groove for window board

A rebate to allow a location for the window board on the inside of the frame section.

Head Drips

This is used for concealing the external vent grill and weather protection.

Trickle Vents

A very small hole in the window frame covered by opening vents to allow natural ventilation. Reducing the risk of condensation, these are covered by Part F of the Building Regulations.

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