Frequently Asked Questions

What exactly are UPVC Windows?

UPVC windows are today’s general terms used for double glazing. The double glazing part of the window is the glass, or sealed unit, this comprises of two panels of glass, i.e. double glazing or double glazed.


UPVC windows glass panes are kept apart by a spacer bar which contains hundreds of tiny silica balls. These same balls can be found in the little bags you find in the packages when you buy electrical goods to keep then dry and free from moisture. It is these balls that soak up any moisture that exists in the air gap between the two panes of glass.


Normal float glass or safety toughened (tempered) glass?

UPVC windows glass itself will either be normal float glass for small double glazed sealed units or safety toughen also known as tempered glass for larger double glazed sealed units as required by building regulations.


What is tempered or safety glass?

Tempered glass when broken shatters into many small fragments and prevents major injuries. Due to these characteristics tempered glass is used traditionally in applications requiring increased strength such as Patio doors, French doors or UPVC windows. However tempered glass should receive the same care as annealed glass.


UPVC Windows Insulation?

Turning to the sealed unit itself, the insulating effect of double glazing can be affected by a number of factors.


q       Double glazing insulation is affected by the cavity width of the sealed unit.

q       The use of argon instead of air in between the panes.

q       Utilising a low emissive coating that reflects heat back into the room.   


The latest UPVC windows now offer greatly improved insulation compared to traditional single glazing openings. In addition to their better insulation, UPVC windows are also draught-proof and therefore reduces the amount of heat that can escape, so you can cut down on your heating and save on fuel bills without sacrificing comfort.