Secondary Glazing

Ventrolla are approved installers of Selectaglaze, the market leader in secondary glazing.

Although secondary glazing has many benefits, the main reason we promote the product is for noise control in extreme environments, for example, near airports or busy roads.

The key to selecting secondary glazing is to choose a product that suits the property owner’s need but has the lowest visual impact. There are four main configurations of secondary glazing:

1.    Lift out units (Series 30)
These units are used where the primary window is fixed or where a customer seldom requires access to open the window for ventilation.

2.    Horizontal sliding (Series 10)
These units are generally used with casement/hinged primary windows.

3.    Vertical sliding (Series 20)
These units are normally used on vertical sliding sashes with the meeting rails aligning with the primary window meeting rail.

4.    Casement style (Series 45)
These units are generally used in conjunction with either sash or casement windows where full access is required and where there is sufficient space internally to open the casement secondary glazing.


Installation:

To achieve a higher acoustic performance, a minimum gap of 100mm should be achieved between the primary window glazing and the secondary glazing. The optimum desirable gap is 150mm. The installation method will depend upon the depth of the primary window reveal. If the reveal is insufficient to achieve the minimum 100mm gap, then the window will require boxing out to the required depth. Our Surveyors will advise on this and any other issues at the time of survey.