This is not in my disciplinary area.

This is not in my disciplinary area.

Usually if the roof is kept in good condition, a historic structure will degrade much more slowly.

Among the degradation thresholds of the material cultural heritage, first that it is not technically irreversible, that is to say that we have no material evidence of this cultural heritage, second that we have when - even kept archival documents such as photos, plans, maps, etc., which can help us to reconstruct the initial state of this material cultural asset, thirdly that we will have preserved a certain tradition of construction of this cultural asset according to ancestral techniques, by source persons. And finally, we need a political vision to carry out the reconstruction, or the reconstitution of this cultural asset. So these are the steps that seem to me necessary to safeguard the heritage of any irreversible action, whether human or natural. Thanks very much Fatima BOUCHMAL Professor of Cultural Heritage Sultan Moulay Slimane University Beni Mellal Morocco