North Carolina Building Contractor License Practice Exam

Which type of panel is considered an excellent base for tile?

1. Osb board

2. Backer board

3. Plywood

4. Particleboard

The correct answer is: Backer board

Backer board is the preferred choice for installing tile due to its specific properties that enhance tile adhesion and durability. It is typically made from materials that are moisture-resistant, providing a solid and stable surface that prevents water damage and warping, which is crucial in tile applications, especially in wet areas such as bathrooms and kitchens. One of the key advantages of backer board is its ability to create a flat and even substrate that helps to eliminate the risk of cracking in the tile above, a concern that can arise if a less stable board is used. Additionally, backer board is suitably designed to accept tile mortar, which ensures a strong bond between the tile and the substrate, facilitating a longer-lasting installation with minimal maintenance. In contrast, materials such as OSB, plywood, and particleboard may not provide the necessary resistance to moisture and can lead to issues like swelling, warping, or mold growth if exposed to water. Therefore, backer board stands out as the best option for use under tile due to its structural qualities and ability to withstand the operating conditions of tile installations.