If your sink s flange is secured to the granite with glue or a similar substance you ll need to remove it but it s likely that you need only lift the sink up and out of its place in the granite countertop.
Remove cast iron sink from laminate counter top.
Loosen the mounting bolts holding the stainless steel sink to the laminate top with a screwdriver and remove them.
Measure out the lip around the sink.
If you re planning on junking the top anyway then don t worry about damaging the formica.
If you do you will most likely break the plastic laminate on the countertop.
The sink installs flush to the laminate not below the surface of the counter to prevent water from soaking into the particleboard.
Undermount sinks install on laminate counter tops differently than on granite or stone.
Be careful with the sink s removal as dropping it will likely damage the stone counters.
Measure and mark out the cut for the sink hole in the countertop and surrounding cabinetry by measuring the width and length of the bowl s.
The original gluing was not done properly or the glue has just released due to age you will have to break the sink apart to get it out.
There are typically two to four bolts holding the sink in place.
These type counter tops have been used with cast iron sinks for decades.
Don t include the lip in the countertop cut as the lip will support the sink.
If you are referring to laminate covered counter tops that have 5 8 particle board as a substrate you are fine.
So unless the sink has loosened of its own accord i e.
Ensure the available cast iron sink will fit before you begin cutting.
There s no way around it.
You must have two people when you are removing a cast iron sink.