Reply To: Cracks in extension roof ceiling and roof is 20 years old

[Tom Green]

I think if you can slot a 1 pound coin in the crack you’d probably need a structural engineer to have a look anything smaller most likely seasonal movement. I have lots, a horrible one where 80’s extension meets original house. It’s been replastered but still came back! Monitor over time, you’ll probably find it gets bigger in winter and hardly noticeable in the summer.