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Tip: By selecting a prefabricated granite, which has already been cut to a standard depth, you can save nearly $400 in labor costs. Fabricators can cut the prefab slabs to the exact length and form three individual segments. They can also attach the undermount sinks, drill ports to accommodate the faucet type and cut the backsplash pieces to size.
First, run a bead of silicone caulk around the top edge of the lowest cabinet.
Carefully set the heavy slab into position. Repeat the process for the remaining two granite segments, being careful not to damage the mounted sinks.
Next, it's on to the granite backsplash. Squeeze three large dollops of silicone adhesive and press them into place.
To complete the granite installation, seal the seams with bath/tile caulk.
Bathroom Countertop and Sink Tips: