Saw something today new to me. House was about 3-5 years old. Vinyl Thermal Pane Windows (double hung, casement and fixed). 2-story at front and 3-story at back and rear end/sides of house.
Fiberous / Hardboard 4x8 siding panels. Wood trim with flashing over trim and over windows. 35% of all windows had weep holes still closed up.
Of that 35% about 1/3 had moisture deterioration to wood trim below the window. Several windows had been heavily caulked (silicone). Seller said they’d been there 3.5 years and had 1 leak during HEAVY wind-driven rain - NEVER again.
Tramex Moisture Meter showed high under 3 windows / Mediocre or 0 at others. On about 35% of T-Pane windows when you looked down at the silver metal T-Pane Track between the glass you saw bits of black something (almost like you had crumbled black crackers OR spilled black ashes in there). This is a NEW one to me (mold, mildew, OR ???).