Mortar frequently fails to stick to bricks due to several common masonry errors, most notably using dry, porous bricks that rapidly suck the essential moisture out of the wet mortar before it can properly cure. To prevent this, masons must thoroughly pre-wet bricks so they are damp but free of standing surface water before application. Other frequent causes of poor mortar adhesion include applying mortar over dusty, dirty, or greasy brick surfaces, working in freezing or excessively hot weather conditions, or using an improperly mixed mortar batch with incorrect water ratios. Ensuring clean surfaces, proper moisture control, and correct mortar formulation is vital for a permanent bond.
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