Buffing: In time, tile produces a chalky deposit on its surface. This is called efflorescence, and is caused by a natural chemical reaction in manufactured concrete. Efflorescence dulls the sheen of the surface, but in no way affects the structural integrity of the tile. Buff tiles with a clean rag. {“smallUrl”:“https://www. wikihow. com/images/thumb/e/e5/Maintain-a-Tile-Roof-Step-3Bullet1. jpg/v4-460px-Maintain-a-Tile-Roof-Step-3Bullet1. jpg”,“bigUrl”:"/images/thumb/e/e5/Maintain-a-Tile-Roof-Step-3Bullet1. jpg/aid1623817-v4-728px-Maintain-a-Tile-Roof-Step-3Bullet1. jpg",“smallWidth”:460,“smallHeight”:345,“bigWidth”:728,“bigHeight”:546,“licensing”:"<div class="mw-parser-output">

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<br />\n</p></div>"} Priming: Coat your roof with a clear alkyd primer. This gives the surface a protective sheen that reflects the sun’s rays, keeping your home cooler. Primers also help fill the porous surface of concrete, making it repel water efficiently. {“smallUrl”:“https://www. wikihow. com/images/thumb/2/25/Maintain-a-Tile-Roof-Step-3Bullet2. jpg/v4-460px-Maintain-a-Tile-Roof-Step-3Bullet2. jpg”,“bigUrl”:"/images/thumb/2/25/Maintain-a-Tile-Roof-Step-3Bullet2. jpg/aid1623817-v4-728px-Maintain-a-Tile-Roof-Step-3Bullet2. jpg",“smallWidth”:460,“smallHeight”:345,“bigWidth”:728,“bigHeight”:546,“licensing”:"<div class="mw-parser-output">

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<br />\n</p></div>"} Painting: Use a heavy-duty acrylic paint. The polymers provide a durable, waterproof finish while improving the appearance of the roof. Some paints also are mildew-resistant. While gently buffing tile with fine sandpaper helps paint adhere to the surface better, the practice is impractical when painting a roof. Use a sprayer for the job, being careful not to paint other parts of the structure. {“smallUrl”:“https://www. wikihow. com/images/thumb/d/da/Maintain-a-Tile-Roof-Step-3Bullet3. jpg/v4-460px-Maintain-a-Tile-Roof-Step-3Bullet3. jpg”,“bigUrl”:"/images/thumb/d/da/Maintain-a-Tile-Roof-Step-3Bullet3. jpg/aid1623817-v4-728px-Maintain-a-Tile-Roof-Step-3Bullet3. jpg",“smallWidth”:460,“smallHeight”:345,“bigWidth”:728,“bigHeight”:546,“licensing”:"<div class="mw-parser-output">

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<br />\n</p></div>"} Sealing: Applying a clear acrylic sealant is a key part of a roof-restoration project. Use a sealant to help restore the color and durability of existing tile. {“smallUrl”:“https://www. wikihow. com/images/thumb/a/a7/Maintain-a-Tile-Roof-Step-3Bullet4. jpg/v4-460px-Maintain-a-Tile-Roof-Step-3Bullet4. jpg”,“bigUrl”:"/images/thumb/a/a7/Maintain-a-Tile-Roof-Step-3Bullet4. jpg/aid1623817-v4-728px-Maintain-a-Tile-Roof-Step-3Bullet4. jpg",“smallWidth”:460,“smallHeight”:345,“bigWidth”:728,“bigHeight”:546,“licensing”:"<div class="mw-parser-output">

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