I usually rout the plywood 7 16 or so and add cleats on sides that will carry weight.
Can you undermount a top mount sink.
Usually undermount sinks are used for this purpose.
There are however some disadvantages.
Most top mount sinks have a fairly thick rim more than that is obtrusive.
Don t make such a project out of it.
An undermount sink does have a rim but the rim is not visible because it rests up against the bottom of the counter.
The main requirement is adequate support.
Most any sink can be undermounted.
One of the many advantages of granite and quartz countertops in a kitchen is the unique option to undermount a stainless composite or cast iron sink.
It s because all the areas you need to work of the drop in sink are visible and easily accessible.
Though the seam that s formed by the countertop and the lip is small and visible it can still build up grease.
Undermount sinks mount to the bottom of the countertop and are held in place by heavy duty clips and caulk or a special adhesive.
Our gc had to install our undermount prep sink as a drop in in our oiled wood island.
Look at the bench top from side on to ensure that there s clearance.
There are a lot of people out there who love the look of their drop in sinks but also want to have an undermount sink design for their countertops.
The edge of the countertop along the sink cutout is entirely exposed.
We do not recommend this though because the flange or rim is flat which leaves a somewhat sharp edge and makes it hard to properly seal.
It looks fine not great but fine.
Undermounts look like a more premium offering.
He wouldn t undermount it because he was certain the cut edges of the wood would rot.
Our undermount stainless steel kitchen sinks do not have the installation holes already drilled and technically can be used in a top mount fashion.
The answer is a top mount sink.
Which will could likely be the case with an under mount as they re designed to mount below not above the bench top.
Do what you need to support it so that the top of it is flush or slightly lower than your 3 4 roughtop.
However the accessibility and visibility provide you better cleaning facility.