I visited a homeowner who was frustrated with high energy bills and a constantly dusty house, even though their AC was fairly new. I performed a diagnostic and found that the problem was significant air leakage from their attic ductwork, which was pulling in insulation and hot attic air. I solved the issue by systematically sealing all the leaking joints and connections with professional-grade mastic sealant. This stopped the air loss, which will lower their energy bills and dramatically reduce the amount of dust circulating in their home.