Sliding Sash are much more traditional.  Sliding sash can be supplied with or without Georgian bars and in timber or pvc-u.  Our pvc-u Heritage range are incredibly like timber in appearance.  The dimensions of the frame sections are similar to those of traditional timber windows but Heritage pvc-u frames will not warp or rot and are fully draught stripped.  They also can be tilted once opened, for emergency escape and to make cleaning the outside of the glass easy.