Q: Does hair that has been trimmed off (for example, from one’s beard or one’s head) act as a barrier to water (whether during ghusl or wudhu)? For example, if this trimmed hair got stuck in one of the nails, would it act as a barrier to water reaching the skin? Or is all hair, even if it is trimmed and no longer attached to one’s body, considered water permeable?
A: No, it will not act as a barrier.
And Allah Ta’ala (الله تعالى) knows best.