Should all roof tiles be replaced?

[Lifeshine]

Hello. I am planning to extend a house. It currently has 2-curved tiles on the roof. These are from the mid-80s. Should one replace all the tiles on the roof or just complete the new section?

 

[fribygg]

If you have clay tiles, I would only replace those that have any defects. A concrete roof from the 80s, on the other hand, might be time to replace entirely.

 

[Charlotte Andersson]

Roof tiles basically have an eternal life as long as they remain intact. Even concrete roof tiles are suitable for reuse. Replacing tiles on the entire house to match an extension is more about what one finds aesthetically pleasing. If the roof has been untouched since the house was built, you should seriously consider replacing the underlay and battens on the old roof when you are planning to add an extension. The tiles can be reused to the benefit of both the environment and your economy.