Traditional Sliding Sash windows with weights and pulleys ensure the windows are easier to open, energy efficient, secure, soundproof and in keeping with the original style of the property. A modern option perfect for new builds is the concealed spiral balance which are easy to use, perform a smooth opening and closing and meet the same quality standards as traditional. Horizontal sliding sash windows (Yorkshire Lights) are traditionally square in cottages, which open by the inner sash sliding behind the outer, making the sash operation easy and smooth. Glazing bars in standard options or set to personal design requirements.