Roof
What is the condition of the roof?
Are there any stains in the internal ceilings showing evidence of leaks? What is the condition of the ceilings?
Can you get access to the loft space to check for daylight through the roof? What is the condition of the felt?
What is the condition of the chimney?
Does the flashing need repair?
Floors
What are the floors made of?
Do the floor boards creak?
Are the joists showing signs of movement? Is there any evidence of dry rot in the wood work?