How To Cut A Granite Countertop For A Sink

Cutting a granite countertop for a sink is a task that requires precision and attention to detail. Granite is a hard and brittle material, so it is important to use the correct tools and techniques to avoid cracking or damaging the stone. With careful planning and execution, you can achieve a professional-looking cut that will perfectly fit your sink.

Materials You'll Need:

Granite countertop
Sink
Pencil
Tape measure
Straight edge
Angle grinder
Diamond blade
Safety glasses
Dust mask
Ear plugs
Water source

Step 1: Measure and Mark the Cutline

Begin by measuring the sink and transferring the measurements to the countertop. Use a pencil and straight edge to mark the outline of the sink on the countertop. Ensure that the measurements are accurate and that the outline is straight and square.

Step 2: Set Up the Angle Grinder

Fit the angle grinder with a diamond blade specifically designed for cutting granite. Wear safety glasses, a dust mask, and earplugs for protection. Ensure that the grinder is plugged into a grounded outlet and that the blade is securely attached.

Step 3: Cut the Granite

Hold the angle grinder firmly and guide the blade along the marked cutline. Keep the blade perpendicular to the surface of the countertop and apply moderate pressure. Use a water source to cool the blade and prevent overheating. Slowly and carefully cut along the outline, taking your time to ensure a clean and precise cut.

Step 4: Smooth the Edges

Once the cut is complete, use a grinder with a finer diamond blade to smooth and refine the edges of the cutout. This will remove any rough or jagged edges and create a smooth, polished finish.

Step 5: Test Fit the Sink

Before installing the sink, test fit it in the cutout to ensure a proper fit. The sink should fit snugly without any gaps or overhangs. If necessary, make minor adjustments to the cutout using the angle grinder until the sink fits perfectly.

Step 6: Install the Sink

Apply a bead of silicone caulk around the perimeter of the cutout. Carefully set the sink into the cutout and press it firmly into place. Wipe away any excess caulk and allow it to cure according to the manufacturer's instructions.

Additional Tips:

Use a sharp diamond blade to ensure a clean cut.
Keep the blade wet during cutting to prevent overheating and extend its lifespan.
Wear appropriate safety gear to protect yourself from dust and flying particles.
Take your time and cut slowly and carefully to avoid mistakes.
If you are unsure about any aspect of the process, consult with a professional.