When a wall is wet, it is impossible to consider the slightest decoration work. First of all, we must find the origin of moisture. Then it must be treated by dehumidification, heating, ventilation, application of a water-repellent product, etc. Without these treatments, your decorating work will deteriorate quickly, and you will have to start all over again.
- Hard brush
- Special product against moisture
- Basting brush or roller
- Knife to coat
- Neoprene adhesive
- Flat brush
1. On a damp wall, the paintings blister and peel, eventually falling. Wallpapers are degrading and peeling off. When the walls are wet and covered with saltpeter or efflorescence, the appropriate solution must be found. First, try to reduce the cause of moisture. It is often rather flagrant: roof leaks, gutters or descents, cracks in the facade. Sometimes it is less obvious: condensation, leakage of a pipe, capillary rise, etc.
2. Once you have corrected the causes of humidity (by repairing pipes, gutters, descents, filling facade cracks, waterproofing foundations, resin injections, etc.), you can treat the surface of the interior walls. If moisture continues to seep in, problems will reappear later. With a stiff brush, start by scraping all the parts of the wall concerned.
3. When efflorescence or saltpeter has been removed, allow the plaster to dry. Ventilate and strengthen the heating of the room. Switch on an electric dehumidifier. Apply on the wall a product against moisture (water repellent), trade. Apply the product with a whitewash brush, paint roller or sprayer. Treat very widely, even if the humidity is limited and do not affect the entire wall. Pass two layers of product.
4. Allow to dry for at least two days before applying the repair coating. In case of capillary rise difficult to treat from the outside with a sealant on the foundations, you can fight against the humidity by the injection of liquids based on silicone and resin. These products infiltrate the pores of masonry and solidify in contact with moisture.
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