Mar 13, 2017 · When to Use Unmodified Thinset Mortar? Traditionally, unmodified thinset mortar has been used to adhere an impervious tile to an impermeable backing. For example, …

Feb 8, 2017 · Learn the differences between modified and unmodified thinset mortars, and when to use each one. Tile expert Tom Meehan explains how to choose between these two …