Turn the last stud on the 1st wall sideways and overlap it about halfway previous the connecting wall to create drywall backing. Found mould in my basement about per month in the past - result of leak in h2o tank. H2o shot into drywall and foundation. Replaced tank and Servpro https://johnathandbxuq.get-blogging.com/34346772/basement-finishing-near-me-an-overview