Michael Petruccelli says; Urine? You're out! When speaking of pet odors, urine
probably has to be the number one cause for wrinkled noses. But don’t be fooled
by claims that painting over the damage is enough to fix and seal the issue. Urine
stains in carpet can seep down into the carpet pad and even into the sub-floor
leaving lingering odors that could deter potential buyers. Floors, wood trim, or
drywall that has been damaged by urine ultimately needs to be replaced. That
is the only way to truly remove the damage/stains and the resulting odor.