How to Fix Bricks Coming Loose from Mortar in Construction

Bricks coming loose from mortar are usually caused by an incorrect mix (too much water or too much sand), insufficient tamping when the bricks were first laid, or rapid drying due to high temperature or low humidity. Vibrations from other construction work or uneven pressure can also loosen the bricks.

You can do a simple check by pressing the suspect brick with your hand; if you feel a gap or the brick moves easily, clean out the old mortar with a wire brush. Mix fresh mortar using the standard ratio (1 part cement, 3 parts sand, add water just enough to reach a creamy consistency), then fill the joint and press the brick firmly with a trowel or a pointing tool. Make sure the repaired area is within a height you can safely reach and wear gloves.

If the loose bricks cover several courses, are part of a load‑bearing wall, or you see multiple cracks spreading, stop the DIY work and call a professional mason. Work on walls higher than 2 m, or any situation that requires ladders, scaffolding, or heavy equipment, should be left to trained technicians to ensure safety and structural integrity.