Plywood substrate requires how much space between panels?

The correct answer is 1/8 inch, which is the standard spacing required between plywood panels used as substrates in tile installations. This gap is important for allowing for expansion and contraction of the plywood due to changes in humidity and temperature. Adequate spacing ensures that the panels can move slightly without causing stress or damage to the tiled surface above, avoiding issues such as cracking or uneven tile placement.

This spacing also plays a significant role in ensuring a proper bond between the plywood and the tile adhesive, facilitating a smooth application and helping to maintain the integrity of the finished surface. In contrast, wider gaps might lead to excessive movement and even shifting of the tiles, while smaller gaps could lead to swelling and other structural issues in the substrate. Thus, adhering to the industry standard of 1/8 inch is critical for a successful tile installation over plywood substrates.