On Jan 6, 9:37*am, Robert Macy wrote:

So, my question is
How do you repair/prevent cracking at drywall seams WITHOUT creating a
huge lump on the surface? I already have built up 1/8 inch thick to ++
on these stupid seams.

More mud = more cracking. Tape/mud won't keep a wall from moving.

If the wall is moving, pull that sheet off and tie the studs together,
which if the studs are wood should have fire blocks installed between
them already.

The bed coat for the tape only needs enough mud to paste the tape
solidly to the wall; all excess should be removed, the tape should be
visible through the mud.

The 2nd (and 3rd) coats should not extend beyond the taper in any
direction.

You apply the 2nd coat and knife it level with the taper. The 3rd
coat, if necessary, is knifed identically.

Self-sticking fiber tape is often easier for the novice to apply, and
perfectly acceptable, the bed coat just goes over instead of under.
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- gpsman