Please see below more details about my sash window repairs, restoration and draught proofing in London. Rot Sash Window: I patch in new wood to sills and frames and also replace sills and frame sections. Rattles will be cured by tightening up the frame etc. Glass And Putty Repairs: Replace broken glass and repair old putty is also part of our sash window refurbishment and restoration process. How I Draught Proof /Insulate Your Sash Windows and Casement windows and stop the Rattles. The result is a consistent brush seal all around your windows.