The super-fast trick to eliminate rising damp in walls: your walls will look brand new again without breaking the bank or calling in a professional. More info in the first comment.

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 thick. Wear gloves to avoid prolonged skin contact.

Apply the protective layer

Using a trowel, apply a first even