1. Replace rotten sill with hardwood sill

2. Carefully remove sashes that are stuck, clean off excess paint.

3. Replace broken glass and add new putty.

4. Remove staff beads, replace with draught proof beads.

5. Remove parting beads, replace with draught proof beads.

6. Remove old sash cords and renew.

7. Remove old pulleys if required and replace with new.

Remove rotten timber, treat area with timber treatment, repair rotten sections of timber. 

8. Primer / undercoat any bare timber.