Request a copy of the receipt from roof replacement company.
How to determine age of tile roof.
This is one of the surest signs that the roof age has reached its maximum unless the leak can be traced to an isolated area of damage.
Curled or buckled shingles.
If it does then you can contact the county government and request a copy of the permit.
My personal home has a tile roof and it went 32 years before needing to be replaced.
The truth is it really should ve been at more like 27 years.
If you look into the gutters and they are full of granules from your shingles there is a strong probability that your tiles are near their end of life.
Asphalt shingles or rolls.
Clay tile typically lasts 40 to 60 years while slate and concrete tiles have a lifespan of 50 to 100 years.
Asbestos cement and fiber.
This will contain the exact date the roof was installed and is one of the most accurate sources of information you are likely to find.
Metal rubber or synthetic.
Roofing material the types of roofing and their history will aid in determining the age and condition of the covering material.
Signs of shingles eroding.
These types of material include.
The seven signs of roof age.
It is certainly possible that a tile roof could last 40 years.
Leaks and water damage.
Regarding your comments on roof age both sides can be correct.