{
  "url": "https://www.coloradoremodeling.company/faq/why-is-a-specialized-underlayment-necessary-under-bathroom-tile",
  "name": "Why is a specialized underlayment necessary under bathroom tile?",
  "@type": "FAQPage",
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  "speakable": {
    "@type": "SpeakableSpecification",
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    {
      "name": "Why is a specialized underlayment necessary under bathroom tile?",
      "@type": "Question",
      "acceptedAnswer": {
        "text": "A waterproof underlayment or cement backer board is critical beneath bathroom tile installations. Standard wood subfloors expand and contract with humidity changes, which causes grout lines and tiles to crack without a decoupling or backer layer. In addition, cement board does not break down or rot if moisture passes through grout lines. For sheet vinyl or luxury vinyl, an approved moisture barrier or smooth plywood underlayment prevents moisture transfer and guarantees a flat surface so planks lock tightly together.",
        "@type": "Answer",
        "description": "Backer board creates a rigid, moisture-resistant base that prevents tiles from cracking due to subfloor movement and shields wood framing from ambient moisture."
      }
    }
  ],
  "description": "Backer board creates a rigid, moisture-resistant base that prevents tiles from cracking due to subfloor movement and shields wood framing from ambient moisture."
}