Walk carefully on the ceiling joists in the attic or use a sheet of plywood to walk on so you will not accidentally put a hole in the ceiling panel.
Repair roof tile from inside.
If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic often water runs to openings in the vapor barrier such as at ceiling light fixtures.
Inspect the roof structure near that spot for any traces of missing or broken shingles loose nails or wear and tear.
Thankfully you can address your leak without having to step outside.
Make the final repair as soon as weather permits.
There is obviously no felt on the roof either so it looks like you are going to need a new roof.
For anything but an occasional cracked or broken tile hire a roofer.
Repairing a roof leak from the inside is a temporary fix only.
Fixing a roof tile crack.
Unfortunately roof tiles cannot be replaced from inside.
Here are a few simple tips that will allow you to fix your leak from the inside.
Sometimes the water shows up at a ceiling spot distant from the leak.
Expert advice on how to repair tile and masonry roofs including fixing holes and cracks and tips for replacing broken roof tiles.
But just like any other material they are.
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Some roof leaks are tough to locate.
While on the roof look for the wire you poked through your ceiling from inside.
Examine your roof from outside.
The most common problem with tile concrete tile fiber cement and other types of masonry roofing is cracking.
Roofing tiles are one of many different types of roofing materials you can choose from to protect the roof of your home.
I d tend to agree with agl above.
Holes in roofing felt are quite common here we repair a hole in some roofing felt that is underneath the tiled roof.
Next push a wire through the roof leak and out through your roof.
70 years is more than enough time for any roof especially if it has clay rosemary s on it and it sounds like they have blown.