Prayer: Prostration and Tayammum on Cement or Concrete: What’s the Ruling?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: Prostration and Tayammum on Cement or Concrete: What’s the Ruling?

English:

Question #487:

What is the ruling on performing prostration and tayammum on cement or concrete tiles?

Answer #487:

There is no problem in doing prostration, and tayammum on it, although it is a caution to refrain from doing tayammum on cement and concrete tiles.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer