Replacing the mud bricks of the graves with cement blocks

Q: The municipality has resolved to replace the mud bricks of the graves with cement blocks, because they have been damaged by rain and sun and are spoiled while being transferred. As for cement, it is better and more useful. We hope you will guide us concerning the permissibility of using cement instead of mud bricks.

A: It is better to use mud bricks in building graves, for this is what was done by Muslims, as they hated using tiles and whatever is made by fire. Accordingly, it is better to continue using mud bricks and not to replace them with cement.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.