I have a house about 65 years old and I just had my roof inspected. The roof tiles are ceramic and in what look like pretty good condition (eg not cracked or broken) however I have been told they have become porous and are allowing water to seep through to the underside of the tiles. It seems no water is dripping into the roof cavity but the tiles are definately damp to touch underneath. I was advised that the roof will need to be replaced, however I was given some other advice that they may just be able to be resealed. If anyone has any suggestions on the best course of action here it would be greatly appreciated.