Why are basements moldy / Discussions

...are you located? The severity of the climate you live in will play a big factor in how you want to proceed, cinder block foundations in cold climates are trickier than warm ones. Find your climate zone here on this page. 

...are in the planning stages of designing a new home to be built to passive house standards, although not interested in certifying it.  We are trying to decide between having a basement vs.  a slab.  The house will be around 3000 ft2 and we do have room to do either option.  Soil conditions are not a factor, we are locat...

...are already dry and mold free? the exterior of the basement walls has 2”  of foam on them so any warmer air from finished basement would permiate through mineral wool to the wall but air space would or should allow for dry out no? Thoughts on that specific method?  Any research on it or seen it before fail or do fine? ...