I have a two part set of ladders that I have had for years. Bought them from wickes. Trouble is they are fine for reaching the roof line at the back of the house but not high enough to reach the roof for the front of the house. Can you buy extra ladder sections? (Ie make it a 3 part ladder). Does this option exist? I know how ridiculous this might sound but space is limited and access tricky as it’s a terraced house. And I don’t want to buy a new set of ladders! Roofers and window cleaners please help!