basement room 58% humidity

[central nj]

Hi,
I have a finished/conditioned basement, drywall on sides (?insulated also). There is a small, silly, maybe 150 sq ft door-ed off unfinished room. This tiny room isn't conditioned. The house is 70 F, 35% humidity; the tiny room is high 50's, but also high 50's humidity.

I read that ideal humidity should be <50 to prevent mold/etc. Should I be worried about this little room? It's not like i see any mold on the concrete or rafters. Should I add a small supply to it or do something just in case?

Steve

[stvc]

You most likely have nothing to worry about.

Relative humidity [RH] is relative to temperature. Hot air can hold more moisture than cold air, so the same amount of air and water will have lower RH at 70F than at 55F.

[teddy bear]

Hi,
I have a finished/conditioned basement, drywall on sides (?insulated also). There is a small, silly, maybe 150 sq ft door-ed off unfinished room. This tiny room isn't conditioned. The house is 70 F, 35% humidity; the tiny room is high 50's, but also high 50's humidity.

I read that ideal humidity should be <50 to prevent mold/etc. Should I be worried about this little room? It's not like i see any mold on the concrete or rafters. Should I add a small supply to it or do something just in case?

Steve

Occasional 60%RH is ok usally. You will need dehumidification when the outdoor dew points go +60^F and the a/c is not operating much. Continue to monitor the all of the lower levels of the home as the outdoor dew points rise this spring. When you exceed 65%RH in any space, operate a good dehumidifier. Free standing units like the Santa Fe or Ultra-Aire are high efficiency and durable.
Keep us posted as the outdoor dew points rise. You will be amazed on how the basement %RH tracks with outdoor dew points.
Regards TB

[stvc]

Just another thought, you could probably just leave that door opened a little to equalize things a bit. Still don't see it as a winter problem but like TB said keep an eye on it this summer.

[ga-hvac-tech]

Circulation of air would help... might look at a small vent in the room and either keep the door not quite closed or cut a small vent into the door. Result will be a small amount of air moving through the room... thus mixing drier air with damper air.

Yes, there is more science to it than this... however air circulation always helps.