How long should mortar stand before remixing?

The recommended time for mortar to stand before remixing is 15 minutes. This waiting period allows the components of the mortar to hydrate and form a more consistent mixture. If you remix the mortar too soon, it may not achieve the necessary bond strength and workability. The standing time contributes to the effectiveness of the mortar in tile installation. After this period, the mortar can be stirred again briefly to restore its workability without compromising its properties.

Options indicating other times, such as 10 minutes, 20 minutes, or 25 minutes, either fall short of providing adequate time for hydration or may lead to extensive hydration changes that could affect the integrity of the mortar's performance. Thus, the optimal wait time of 15 minutes strikes the right balance for ensuring quality and efficiency in tiling work.