Concrete Tile Roofing and fire/heat damage

[s2351me]

Anyone know whether the heat from smoke can damage concrete tiles either from the heat or subsequent rapid cooling of firefighter spray. What about microfractures? How probable? How can I know beside large visable cracks. 1966 concrete roof?

[Tom Raymond]

It depends alot on the fire.

My wife rented a commercial space for her print shop that had burned years before. The concrete T beams that made up the ceiling sagged almost 6" over a 24' span and were covered in visible cracks.