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What kind of surface preparation is needed before laying tiles on wooden subfloors?

Directly lay tiles on the wood

Install a cement backer board or an appropriate underlayment

Before laying tiles on wooden subfloors, it's essential to achieve a stable and level surface that can effectively support the weight of the tiles, resist movement, and prevent cracking or damage. Installing a cement backer board or an appropriate underlayment provides these benefits.

Cement backer boards are specifically designed for tile installation as they are moisture-resistant, provide a solid and durable substrate, and help prevent any flexing that might occur with the wooden subfloor. Properly prepping the surface with a backer board creates a suitable environment for the tile adhesive to bond effectively, reducing the risk of tile failure.

Appropriate underlayment materials can also include uncoupling membranes, which further isolate the tiles from the subfloor and improve overall performance by allowing for slight movements without transferring stress to the tiles themselves. This method of preparation maximizes the longevity and integrity of the tile installation, ensuring a reliable and finished surface.

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Use plywood as a base only

Apply adhesive directly to the wood

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