Hidden spring sash windows
Our Hidden Spring Sash is operated with pre tensioned springs to counterbalance the sashes. The spring mechanism is housed within the sash frame avoiding visible unsightly operating gear and maintaining the traditional looks of a sash window.
Equipped with all the authentic design features of our Box Sash the Hidden Spring Sash also has a slimmer frame section in the absence of steel weights which allows for easy installation into properties which do not have a rebated structural openings into which a box sash would typically be fitted.
Like our box sash window the Hidden Spring Sash is also available in the slim 149mm front to back section which has been designed to replace original slim sash window without intruding into the room. Our slim double glazed sash sections are exclusive to our product range.