Vrogum Solborg Airtight Sliding Sash Window

Traditionally, sliding sash windows have characteristically low energy efficiency, which deteriorates with age. Vrogum’s Solborg, however, changes this. Featuring ground-breaking hardware, the Solborg has some of the best water and air-tightness on the market – just as effective as a casement window. By using super low argon gas as standard, our double glazed sliding sash window has a U value of 1.2 W/m^2k and 39 dB sound reduction – meeting low energy requirements for 2020.

This patented airtight sliding sash window is often selected to significantly upgrade the energy efficiency of houses with traditional box sash windows. The unique lever mechanism on each sash pushes the whole sliding sash against a compression rubber seal and does not rely on brush seals (these are common in most sliding sashes and very quickly lose stated airtightness with use).

Upon opening the window, the sashes are separated away from each other – thus avoiding wear on the weather strip. On closing, the sash presses against the weather strip, creating a tight seal.

Designed to be hassle-free to operate: the bottom sash can be tilted inwards, allowing for easy and safe window cleaning. In addition, trickle vents and a lockable handle on the lower frame are configuration options.

The high density of the slow-grown Nordic pine provides the Solborg with a high durability class. And the application of microporous water-based paints further improves the durability. The paint allows the timber substrate to breathe freely and minimises the chance of paint bubbling over time.

Both spring-balanced sashes use a multi-point locking system, have the option of a key-lockable handle and glass units are inserted from the inside. So, security-wise, this is far above what you would expect from a traditional sliding sash. You can also utilise a secure “night-vent” open position where the window can be locked open, leaving a 20mm gap.

The product uniquely delivers airtightness, energy efficiency and a timber window with a long life expectancy. As with all timber windows, these do require periodic inspection and maintenance.

If you need to maintain the traditional look of a property by using sliding sash windows, but don’t want to lose the vastly better airtightness of a casement, give us a call on 01608 684 607 to ask for your free, no obligation quotation.