Indoor relative humidity
I have been reading on here and one concern for moisture in the home is indoor relative humidity and controlling it. We live in Maine and do have central cooling, but most days we like to have windows open and enjoy the fresh air when its not oppressively hot. Today for example, its warm outside but the temperature inside is still feels very comfortable at 75F but the thermostat is reading 73% RH inside.
I recently have discovered that our fairly new house (2 years old), though stays fairly cool or warm without much input of the geothermal system, isn’t insulated optimally or too code and can run the risk of having moisture issues as a result. Should I be worried about the high humidity levels inside while enjoying the fresh air?
House details: 2×6 walls with fiberglass insulation and 3/4″ exterior foam on the exterior of the plywood sheathing and wrapped with tyvek paper with vinyl siding. Interior drywall is painted with vapor barrier sealant paint. Roof is Zip system with shingles directly on it, fiberglass insulated in the 2×12 rafter bays with soffit/ridge vent channels (not sure what size). The attic area though isn’t conditioned or fully finished yet like the house, but was just prepped for future bonus attic room.