Older block homes and rental properties
Many houses in the area are single-story concrete block homes from past decades, some with later additions and some used as rentals. Rental turnover can mean air handlers that were never cleaned between tenants, filters left for months and dryer vents that were never checked.
Older homes may have a mix of original sheet metal and newer flexible duct patched in over the years. Where those meet, tape can fail and leaks pull attic dust into the air stream. We look at joints and plenums as well as the visible registers, because dust from a leaking run can appear anywhere in the house.
