have you sealed the rim joists in the basement? I would expect a 1960
ranch
to be very leaky.

no


Do you run a dehumidifier in the basement?

in the summer usually it can run almost continuasly

Are you sure the humidistat is accurate analog come from the store
uncalibrated, digital are better but yours could be off

it seems about right I do have condensation. it also had a reading of
about 28 in my office at the same temp.

water bill high due to hidden water leak in wall. roof and gutters
leaking or backing up shingles into house.

id say not to my knowledge, and negitive to the rest of the questions
buff. except I do have a 110g uncovered fish tank in basement. and
possibly the kitch. the stove hood vents inside w filter. the kitch
does have a ceiling exaust fan but Im unsure how well it worrks will
check bettor when snow on roof melts. I would not say we do a lot of
cooking and my wife usually cracks a window when cooking.

srost in attic = condensation

bath vent new vented to outside.

Unless you
have evidence of a problem in the house, like moisture on windows,
around recessed lights, etc, then I doubt you really have a problem

id deff say Ive got a prob that was the reason for buying the
humidistat. I have excessive moisture on windows and even sweating occ
on an small portion of the outside upper corner in one room. even if
its off. the humidity is there

what about the basement floor efflorr or is that deff not the
problem???