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Home / Home Services / Painting / How to Do Damp Proof Exterior Wall Coating?
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How to Do Damp Proof Exterior Wall Coating?

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Exterior Painting
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0 2026-10-22T12:51:02+00:00
To do a damp-proof exterior wall coating, begin by thoroughly cleaning the wall surface and taking care to remove any peeling paint while filling in any visible cracks. Then, apply the suggested primer or self-priming product, and follow up with the necessary waterproofing layers. Allow sufficient drying time between each application. This process is essential for safeguarding your outdoor walls against rain penetration and the damaging effects of moisture. Below, I have shared in detail how to do damp proof exterior wall coating.

What are the Steps to Apply Damp Proof Coating on Exterior Walls?

  • Prep your wall properly
Use a suitable brush or cleaning approach to remove dust, grease, flaking paint, algae, and fungus from the surface. Don't forget to keep nearby windows, doors, and floors safe from splashes.
  • Assess the wall's condition
Carefully examine the wall for cracks, hollow areas in the plaster, and any spots that need attention. Clear away weak plaster and restore the surface to good condition before coating. Smaller cracks work well with a good crack filler product, though you will need a professional to look at any large or deep cracks.
  • Begin with the first coat
Take a moment to check whether your product requires a primer or has self-priming properties built in. Some products require mixing with water to thin them out, while others are all set to use right away. Be sure to follow what's written on the container.
  • Apply the waterproofing coats
With a brush or roller in hand, spread the coating evenly across your surface. Apply the full number of coats that is recommended for your product. If your product needs two coats, applying the second one in the opposite direction helps ensure complete coverage.
  • Let your wall dry completely
Give it the recommended waiting period between each coat. How long it takes to dry really depends on what product you're using and current weather conditions. In India, applying a damp proof coating on exterior walls normally costs between Rs. 50 and Rs. 150 per square foot. For the best results, follow the manufacturer's guidelines. If the dampness returns or the wall is severely damaged, contact a painter.

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