Blocking needs to be stud to stud. That will not hold for long if at all, all it will be is a bigger piece of drywall ripped out when it decides it has had enough.

agree with @millworkman do it right now,

would be a shame to have someone lean against it and have it fall off and ruin more than just the wall later. not to mention someone getting injured.

Thank you for the confirmation. Not sure how it can be remedied now that the wall is closed and tiled and that I didn't even see studs regularly spaced in the wall when it was open. Damn is this a can of worms.

My architect gave me some line about how it would be find because the pressure is spread out across such a large surface area. She continued on to say that we should not question construction methods because there is no incentive for the general contractor to do poor work. Boy is she a sucker!

Sucker is right. I hope he hasn't been paid yet.

people cut corners all the time, they figure they'll be long gone when it fails.

I feel your pain.

" She continued on to say that we should not question construction methods because there is no incentive for the general contractor to do poor work. Boy is she a sucker! "

Or getting a kick back.............

Tell him to stand on the sink he's mounted. If it holds, you'll agree to shutup. If it doesn't, he'll agree to reattach it so it does.

@millworkman I think you are right about that, not kickbacks but recommendations for more jobs.

@Joseph Corlett, LLC That is a fantastic idea! Though the architect is an imcredibly petite woman, so who knows, maybe it would hold her! I love the pic somewhere on here of your standing on a vanity you installed.

So frustrating - this is what the GC just wrote to me in response to the pics and conerns about "blocking" drilled into wall board instead of into studs:

I just spoke with our plumber about this. He told me that the blocking is absolutely sufficient and the only issue creating any wobbling is that the sink is not meant to be be wall mounted and is not intended to hang off of that bracket by itself. He is certain that this is a bad idea, and wants me to stress that he thinks that if there is enough clearance under the new sink for the cross bars to be cut and legs moved, that is a far better solution.

Regardless of the sink, all sinks I am seeing that do not sit on the floor need to be anchored to the wall with appropriate backing even if they have a pedestal or console legs. I'm not sure why he is consulting a plumber as this really is a carpentry issue but they do their own carpentry, which apprearantly isn't very well informed.

Sorry you are going thru all of this but this guy sounds like a real piece of work................

If the blocking is not up to the architect's standards then it needs to be re-done. And the labor is on the GC. Don't let him charge you for the do-over.

"The "blocking" is a probably 1" thick panel that is drilled into the wall board."

Are sure the blocking isn't attached to the stud with fasteners that you can't see because you can't see what's on the other side of the stud?

@wdccruise This is a good question. There is no stud on the left side anywhere near the blocking panel so I am sure that it is not attached. Regarding the stud on the right, which is what is shown in the photo, the worker who built this told me that the panel is not attached to the stud but just sitting next to it and only attached to the wall board. The next day another worker on the job asked the guy who built this and the guy who bulit it said it was attached to the stud. Two different stories. I don't know which one is accurate.

My dad suggested "toenailing" a screw from the panel into the right stud so that I at least know there is some kind of fastening happening to one stud, even if it is minimal.

@Sabrina Alfin Interiors . The architect knows nothing about blocking or studs, didn't specify this, can't have an educated conversation about it and sides with whatever the contractor says because she wants to get more work from him.

?? The architect who did the drawings should have had specs for the blocking, just as they would for putting together wall and floor joists/studs. That doesn't sound right to me.

"My dad suggested "toenailing" a screw from the panel into the right stud so that I at least know there is some kind of fastening happening to one stud..."

I'm no expert but I'd say this is insufficient to support a 55 lb. sink. What if somebody leaned on the sink and knocked it off the wall? The supply lines could break resulting in a flood. I'd either reinstall blocking correctly or replace the sink with one that's supported by the floor.

That looks nice!