pclaim: protects cupboard on plowed tile
vclaim: no protection of cupboard on stone paved tile
vclaim+pclaim: no protection of cupboard on stone paved tile
all done above ground, only pclaims protect against all decay but vclaim overwrites that. idk if bug or feature as imo claims should only slow down decay, not completely protect
(i've had a cupboard on plowed tile in pclaim strictly for almost a month now as a test of sorts)