u/Ciriuss925

New Vanity on Existing Cabinet

My over 30 year old bathroom sink is showing its age (rusting around the drain and some leaking underneath - see image #1. I understand doing an enamel repair would be temporary at best. It’s an undermount sink and it is almost impossible to find a a new one with matching specs.

So I’m looking around for a new vanity to replace the current one. My current countertop measures 28” wide and 21” from front to back. See attached Image #3 showing the current countertop which my measurement shows 3/4 inches thick. The underside of the countertop is rough/coarse (Image 3 taken from under the sink and hope everyone can see how the underside of the countertop looks (and feels) like.

I see a prefab vanity top from the website of a big box store with sink that is 28 in. wide and 22 in . depth (front to back) - it already has a front backsplash built in, with a total weight of 113.6 lbs.

So I am wondering if an old marble/granite countertop can support a prefab 113-lb quartz vanity top (including sink) - image #2 attached showing the inside of the sink cabinet looking up)

Also one more thing - the current countertop has one inch overhang on both the front and side. The new prefab im looking at is one inch longer in depth (front to back): i assume it is OK to have a two inch overhang on the front and one inch overhang on the side? The front side and left side of the current countertop are flush to the wall.

This bathroom sink has gotten rusty - once in a while I tried to clean it and the last time I did, the enamel broke off.

Two days ago, I dumped a small plastic bowl of water down the drain and the water leaked under the drain. I believe it was due to the water seeping thru the enamel crack.

I didn’t use the sink for two days. Just now I ran tap water on both hot and cold lines - there was no leaking this tine around. I did observe that the tap water just ran directly down the sink drain.

I’ve been contemplating whether to replace the sink but that would entail replacing the vanity as well and right my I’m under a tight budget. Am thinking of getting the enamel repair kit to save the sink. Hopefully that should prevent any further leaks, right?

One of the 2 bathroom sinks in my 40 year old condo has rusted bad and enough when I tried to clean the rust off , about a half inch enamel broke off and now am dealing with a water leak below the sink. The measurement of the exposed sink on the surface is 16” horizontally and 16.5” vertically. Wondering what size undermount sink should I get? I am also aware unfortunately that undermount sinks are difficult to shop for.

My other option is to just get a vanity top that comes with a sink. The countertop measures 28” wide and 21.5 “ in dimension. This is just a bathroom with sink and a countertop wider than 28} would be touching my elbow sitting on the loo. I’ve looked at the available products and I only see vanity tops+ sink measuring 31 x 22
square inches, which actually cost less than $200. Wondering how much would it cost if I have the vanities trimmed on both edges to get the countertop down to 28 inches. Also wondering how much would labor would be to install a vanity top (plus removing the existing vanity?