Windows at ontime

Vertical Sliders

If you’re looking to replicate the authentic appearance of a timber sash window in your property look no further than the Spectus Vertical Slider that we offer here at OnTime.  


Spectus Vertical Sliders at ontime

the best uPVC sliding sash window.

the appearance and features of a timber sash window with none of the drawbacks.

Spectus have created what is widely regarded as the best uPVC sliding sash window on the market. It maintains the appearance and features of a timber sash window with none of the drawbacks. 

The traditional features of a timber sash window are all retained on the Spectus Vertical Slider including the choice of Georgian or astragal bars, sash horns and a deep bottom rail.  

‘A’ Window Energy Rating (WER)  

Offering a host of colour and woodgrain options alongside a wide choice of furniture and hardware we are sure there’s something to fit the traditional look of your property 

This is all whilst maintaining a‘A’ Window Energy Rating (WER) due to the glazing option and pile seals to both the sash and outer frame.  


Traditional Windows, Without compromise. 



We Are Here To Help You With Any Questions You May Have

Spectus Vertical Sliders are designed to achieve a WER (Window Energy Rating) of Band ‘A’ with 24mm sealed glazing units. This is the same rating as our Rehau casement windows achieve. If you would like more information on Window energy ratings please click here. 

We have been successful in installing Spectus Vertical Sliders in many conservation areas of Shepway after successful planning applications.  

Spectus Vertical Sliders can be equipped with child restrictors to restrict the opening of the sash. These can be unlocked with a key and can be matched to your furniture colour.  

Both Sashes have the ability to tilt inwards for cleaning purposes. They also come with tilt restrictors to hold them.