Is there a way to find out if my current roof has ventilation?

[JamesAsus]

More of a curiosity thing, I don't have major condensation issues or anything but I have non breathable membrane and I can't see any ventilation in my roof.

There's none in the soffits, there is 2 roof vents but they are connected to bathroom extractors. Is there anywhere else to look? The house is 30 years old so not sure if over fascia board vents were a thing then?

I literally can't see any anywhere BUT a smaller roof void over my downstairs toilet and hallway has 2 roof vents not connected to an extractor fan so baffled as to why they would fit them there but not on my much larger main roof.

 

[Mrs Ten Names]

If there's no condensation, why worry.
There might be sufficient cross-flow ventilation in the main roof, but no cross-flow ventilation in the toilet roof space.

 

[JamesAsus]

If there's no condensation, why worry.
There might be sufficient cross-flow ventilation in the main roof, but no cross-flow ventilation in the toilet roof space.

The main roof is a normal roof with 2 sides of eaves. The toilet roof space is a lean to roof that abuts the house wall.

 

[^woody^]

If you look at the roof and can't see any means of ventilation, then it doesn't have any.

 

[JamesAsus]

If you look at the roof and can't see any means of ventilation, then it doesn't have any.

You can't always see over fascia vents though can you?

 

[^woody^]

You can see the tiles sticking up, the extra height, and you can see all the other neighbouring houses built at the same time.