Vertical sliders – traditionally known as sash windows – are among today’s most coveted window styles, and not only in the heritage market with which they’re most associated. With its new VEKA Vertical Slider and MPN Wales your locel Network installers, VEKA has embraced traditional design cues to create a window that is suitable for conservation areas, while offering features and performance that would be entirely at home in a luxurious new-build development.