Undermount Sink Repair After a Bad Install Job

Undermount sinks look great - but they're only as good as the install behind them. When the adhesive bond or support fails, the whole sink can drop. That's exactly what happened here. The sink had separated from the countertop because it was never properly secured to begin with.

Here's what we were working with: a sink that had let go around the entire perimeter, leaving a visible gap between the basin and the countertop surface. Water, grime, and moisture had worked their way into that gap over time. Before we could do anything else, all of that had to be cleaned out completely. You can't just re-glue over a dirty surface and call it a day.

Once everything was cleaned up, we used a proper support system to hold the sink firmly in place during the cure - a wood brace with a threaded rod running through the drain opening, applying even downward pressure across the basin. That kind of setup is standard practice for a correct undermount install. It keeps the sink from shifting while the adhesive sets. The original installer skipped that step entirely.

After the cure, the sink sat flush and tight against the countertop with a clean, sealed edge - no gap, no movement. That's what a correct install looks like. Our general plumbing work covers everything from emergency repairs like this one to full fixture replacements, and we take the same approach every time: fix it right so you don't have to call again.

Bad installs have a way of showing up at the worst possible times. Midnight, early morning - it doesn't matter. When something gives out in your home, the last thing you want is a temporary patch. You want it done properly, so you can move on and not think about it again.