Repairing damp walls: a simple and economical DIY method

waterproof barrier preventing water from rising into the walls while allowing the substrate to breathe.

How do I go about it?

Clean the wall

Start by removing all traces of dust, saltpeter, or mold. Use a stiff brush and a little mild detergent. This step is essential to ensure good mortar adhesion. Then allow it to dry completely before proceeding to the next step.

Prepare the waterproof mortar

In a clean bucket, mix the mortar with the amount of water indicated by the manufacturer. The goal is to obtain a smooth, homogeneous texture that is neither too runny nor too