Timber Mock Sash Sliding Windows

timber_mock_sash_sliding_windowOur open out mock sash sliding window creates the appearance of a traditional vertical slider whilst utilising the hinge and locking mechanisms of an open out stormproof casement window.

The below specification details our open out mock sash sliders. Based on our stormproof window and utilising scribed sash horns to maintain the traditional appearance, this is a viable alternative to a traditional style. A dummy sash to the bottom fixed pane ensures equal sight lines further mimicking the design of a vertical slider. Where there is an egress requirement, the bottom dummy sash can be mounted on butt hinges with thumb turn locking points thus allowing the sash to open up.

Locking System

Like our stormproof windows, our open out mock sash slider utilises mushroom bolts and shootbolts. Our standard espagnolette locking systems have achieved more than 7.4Kn which is more than double the requirements of BS7950. They have also been endurance tested to 40,000 operations and have been salt spray tested for 500 hours by the BBA.

Friction Stays

Tested to 30,000 full cycles and available as austenetic for high corrosion resistance, our UK manufactured friction stays complement our range.


Using the same principles as our other timber product suites, this mock sash slider benefits from dry gasket glazed drained glazing rebates allowing any moisture ingress to ventilate to the outside. For high exposure areas, aluminium bottom beads can replace the traditional bottom beads and our internal teams are happy to advise to meet specific project solutions.

Energy Efficiency

This system is currently not registered under the window energy-rating scheme however we are more than willing to consider to provide calculations should projects require this. Please contact our sales team for further information and advice.

BS 7950 Security

Our mock sash slider window utilises the same high specification ironmongery that achieves the BS 7950 certification on our open out stormproof window but has yet to be tested in its own right.