A successful tile installation project starts with a smooth, solid base or substrate, the level material surface the tile is bonded to using tile adhesives or tile mortar. The Tile Shop carries the materials needed to lay the groundwork for your project. From tile backer board and screws, to tile adhesives and fiber tape, you'll find the prep materials you need for a successful tile project.
Tile underlayment is the layer installed between the subfloor or wall structure and the finished tile surface. It creates a stable foundation for tile, helps manage moisture and movement, and supports long-term installation performance. The right underlayment depends on the application, substrate and level of moisture exposure.
| Underlayment Type | Best For |
| Backer Board | Walls, floors and moisture-prone tile installations |
| Uncoupling Mat | Reducing stress from substrate movement and helping prevent cracks |
| Waterproofing Membrane | Showers, wet rooms and other high-moisture environments |
| Underlayment Sheet | Creating a smooth, flat surface before tile installation |
| Lath | Traditional mortar bed tile installations |
Tile underlayment is commonly used for:
Different applications may require different underlayment systems depending on moisture exposure, substrate conditions and installation requirements.
Consider these factors when selecting underlayment:
Yes. Most tile installations require an appropriate underlayment to provide stability, moisture protection and long-term durability.
Waterproof backer boards and waterproofing membranes are commonly used for shower installations.
An uncoupling mat helps separate the tile layer from the substrate, reducing stress that can lead to cracked tile or grout.
Yes. Many backer boards are suitable for walls, floors, backsplashes and other tile applications.
Selecting the right underlayment helps support a successful tile installation. Whether you're tiling a shower, kitchen backsplash or bathroom floor, matching the underlayment to the project can improve moisture protection, durability and long-term performance. Our tile experts can help you navigate your options and pick the best option for your project. Visit one of our showrooms to get started.
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