On 04/02/2018 09:50, Tim Watts wrote:
On 03/02/18 22:59, dennis@home wrote:
On 03/02/2018 22:37, Simon T wrote:
It would help to know what type of tile and the age of the roof (or
house, if it is relatively new).

Here's a piccy I took last week of the hole

http://www.clipsfromthecryptserver1.com/temp/tile1.JPG

House is about 21 years old, I've lived here about 10.



You just slide the tiles above up, put a new tile on and slide them
down again.

There isn't normally any nails.


Rubbish.

Every x-th course is nailed, every 3rd is typical.

So only a 33% chance of a nail then, assuming any at all.
Like I said then