01 / cracking
This crack,
Is it still changing?
Stop covering construction first
Base shrinkage, inadequate joint preparation, and structural movement can all manifest as cracks. You can't tell if it's stable just by looking at a photo.
- Check first
- Mark the crack width and observe the change, also checking for hollows, seams, and sides for movement.
- risk boundary
- When there are active cracks, penetrating cracks or significant displacement, decorative materials cannot replace the structural treatment.
Suggested processing logic- Determine whether it is active
- Stable base
- partial repair
- Grid enhancement
- Choose a finishing system
02 / Starting alkali
Underneath the white powder,
Where does moisture come from?
Find the source of water and salt first
Alkalization is usually related to moisture migration and soluble salts. If the surface is recoated directly after cleaning, the moisture path is not changed and the problem may reoccur.
- Check first
- Measure the water content, observe the salt precipitation range, and check external water seepage, pipelines, ground capillary water, and wet base layers.
- risk boundary
- When the base is still damp or salt precipitation continues, do not rush to cover it with a dense sealing finish.
Suggested processing logic- Confirm the source of moisture
- Water stop and dryness
- Remove loose salt precipitation
- Compatibility primer
- Choose a breathable system
03 / Water seepage
The water marks disappeared,
This does not mean the water seepage is over.
Stop water first, then talk about finishes
Signs of water seepage may come from exterior walls, roofs, window edges, pipes or adjacent wet areas. Veneers only treat the surface and are not a substitute for waterproof joint repair.
- Check first
- Combine rainfall, water use time and water mark location to investigate the source, detect the moisture content of the base layer and confirm whether it is still developing.
- risk boundary
- Any surface finishing work should be postponed when water from unknown sources, persistent moisture, or pressurized water is present.
Suggested processing logic- Locate water seepage sources
- Repair waterproof nodes
- Dry thoroughly
- Restoring the grassroots
- Do decorative protection again
04 / moldy
Treat the dampness first and allow the wall to heal.
Improve moisture and ventilation first
Mildew is often associated with condensation, water seepage, thermal bridges and insufficient ventilation. Simply covering it up with a new coating will not eliminate an environment suitable for mold growth.
- Check first
- Check corner temperature, relative humidity, ventilation conditions, furniture obstructions, and external or pipe water seepage.
- risk boundary
- Mildew that is extensive, recurring, or involves health risks requires professional cleaning and finding the cause of continued moisture.
Suggested processing logic- Control sources of moisture
- Improve ventilation
- Professional cleaning
- dry base
- Choose the right coating