INSTALLATION | Keystone Standard & Compac Units
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STEP TWO: Install the base course.
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| Place the first course of Keystone units side by side (with sides touching) on the prepared base, with the paired pin holes facing up. Make sure each unit is level — side to side and front to back. The first course is critical for accurate and acceptable results. For alignment of straight walls, use the pins or the straight back edge of the unit. Using the front face will give irregular alignment due to the rough split texture. For constructing curved walls, use the front pin position for best results. Minimum radius for convex and concave curves is 3'6" (1 m). |
