On Nov 2, 10:11 am, Mikepier wrote:
I recently gutted out my kitchen and took down a wall next to a dining
room, where there was 3/8" sheetrock on the ceiling. I did not want to
put 3/8" sheetrock on the ceiling in the new kitchen due to concerns
on sagging, and plus I wanted to use 12 foot boards, so 1/2" sheetrock
was the choice. I tried my best to spackle where the 2 meet ( 4 times
already) it still seems its noticeable, although each time I do it it
seems to get better. What is the best way to spackle the joints?

To hide a 1/8" transition, you're going to have to taper it a long way
into the 3/8" room, going out a couple of feet and gradually building
up, using a very wide blade.