On Sep 30, 12:34 pm, Mikepier wrote:
I am using the H7ICAT (air tight). Unfortunately its not that easy to
use 1/2" rock and feather it out. It's in a very visible location and
I want it to look good. I had 3/8 there before for 40+ years and I had
no problems, so I don't see why I would have a problem now.
I'll try the hammer trick and see how that works.

Some codes prohibit 3/8" gypsum board on ceilings or limit its
application. USG and the Gypsum Association do not recommend anything
less than 1/2" gypsum board on ceilings that will receive a water-
based finish - that means latex paint - and that is predicated on the
1/2" board running perpendicular to the framing. A kitchen produces a
fair amount of moisture and that is also a contributing factor to
sagging.

You can feather out anything. 1/8" is a minimal discrepancy and a
suitably feathered joint would be totally invisible to even a trained
eye.

BTW, it's probably wise to lose the "that's how they did it 40+ years
ago" with respect to materials. Things change.

R