
Is the Prayer Valid If Qiraat Is Recited Aloud in a Silent Prayer Performed Individually?
Would the prayer of a person who establishes it individually be valid if he performs qiraat aloud in the prayers where it should be performed in a low voice?
While establishing prayer alone, it is one of the wajibs to recite silent, that is to say, pronounce with tongue in a voice that one can hear himself only, in the prayers that are established during daytime, i.e. dhuhr and ‘asr prayers and rawatib prayers (Ibn Abidin, Radd al-Muhtar, II, 163, 545).
Abandoning one of the wajibs of prayer deliberately requires re-establishment of it. If it is done due to forgetfulness, one needs to perform sajdah al-sahw. Therefore, a person who recites aloud where he needs to recite silent should re-establish his prayer if he did it deliberately, and he should perform sajdah al-sahw at the end of the prayer if he did it unintentionally (Ibn Abidin, Radd al-Muhtar, II, 545).
Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS