Mark Inman knows what he’s doing. Before the work was done on our house, on a warm/hot day the 2nd floor was uncomfortably hot, the ground floor was cold and the basement was freezing. Yesterday (July 9, 2017) the high was 97 degrees and the house was comfortable throughout (with A/C on) with very little temperature difference between floors, including the basement. Last night the 2nd floor sleeping temperature was perfect and the rest of the house was normal. Prior to the work we would have had the A/C and ceiling fans blasting all night to control the bedroom temperature and in the morning the kitchen would have been like an icebox! Fairly expensive but money well spent. Thank you Mark!