How to Drill Through a Cultured Marble Tub to Install a Faucet

Cultured marble is a resin-based product made up of polymers mixed with marble dust and given a gel coat. Cultured marble can be used anywhere in the bathroom, including vanity tops, tubs and shower surrounds. It is softer and less brittle than true marble, so it is easier to cut and drill. Because most shower surrounds and tubs allow for custom placement of the faucet, they need to be drilled on site.


Measure the cultured marble to find the exact location for the faucet. Mark the center of the faucet's location with a grease pencil.


Position the guiding bit of the hole saw on the finished side of the cultured marble. The guiding bit keeps the hole saw steady so it doesn't scratch the surface of the cultured marble.


Hold the hole saw straight up and down and squeeze the trigger slowly to dig the guiding bit into the tub. Once the bit begins to grip, increase the pressure on the trigger until the hole saw cuts straight through the tub. Repeat for any other holes.


Wipe off the back of the tub with a soft cloth to remove any dust. Dust can interfere with the installation of the tub by coming between it and the adhesive.

Things You Will Need

  • Measuring tape
  • Grease pencil
  • Carbide-tipped hole saw with guiding bit
  • Soft cloth


  • Always drill from the finished side of the cultured marble, not the back. Drilling from the back can crack the finished surface of the product.

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