Case 2

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Remedial

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Figure 1
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Figure 2
  • Arrest the moisture source if any.
  • Scrape off as much paint as possible from the wall using stainless steel brush (Figure 1) [3];
  • Then wash the powdery surfaces with 5% solution of muriatic acid or undiluted vinegar.
  • Rinse thoroughly and allows complete drying to take place.
  • When it is dry, repaint the entire surface with substrate of not more than 6% moisture content.
  • Priming or sealing the surface with appropriate primer or sealer can further prevent water seepage and stabilize the surface (Figure 2) [3]