Secondary glazing

Secondary double glazing increases insulation, gives you extra security, reduces noise pollution and will save you money on your heating bills.

It can be installed on existing windows so it is perfect for listed buildings - and there are several types of secondary glazing systems, depending on your requirements and the style of window you already have.

Lift-outs

The most cost-effective type of secondary glazing available, lift-outs are often used where limited access to the primary window means that the external window is only occasionally cleaned or maintained.

When you need access to the original window, the glazing can simply be lifted out of its secured channel. The double brush pile seal increases the thermal and sound insulation benefits.

Hinged units

A hinged unit is perfect for larger windows and French doors because it can be opened without the need to manually lift the glass.

A hinged unit does not need transoms or mullions (beams and bars), so it is unobtrusive and gives a superb reduction in noise and an improvement in insulation.

Horizontal slider

This is the most frequently used type of secondary glazing and can be used for any window that has vertical bars. We’ve installed horizontal sliding double glazing in all kinds of domestic and commercial properties including historical buildings - and it provides excellent levels of ventilation without interfering with curtains or blinds.

It is available in two, three or four panelled versions and the sashes are fitted with brass rollers for a smooth sliding action. Horizontal sliding provides added security for an older property because it can only be operated from the inside and the twin brush seals eliminate draughts and increase noise and thermal insulation.

Vertical sliders

Vertical sliding secondary glazing is used primarily for older properties that have sash windows. The motion of the sash is controlled by individually pre-tensioned spiral spring balances to enable infinite vertical positioning and ease of movement.

The tilt-in version allows for easy cleaning, but more importantly, it provides an escape in case of fire.