The walls are load bearing and I was told I could just cut through the top plate and brace it. More return air to the 2nd floor will improve the heating problem to the extent that it will help draw the wam air from the 1st floor up. Galvanized Hvac Duct Between Floor Joist Google Search Hvac Duct Duct Work Duct Then tape the cable to the twine and haul the cable up. Running ductwork to second floor . So far I have not noticed a difference. Ad Stone Touch is your complete source for floor care maintenance and restoration. After you drill your holes and find the space in the wall or next to a pipe work from the top down. This duct extends up to the second floor where it often lines up with an interior hallway wall. Running a duct from the first floor to the second involves creating a hole in the main duct and attaching new duct work that terminates in a floor-level heat register on the second floor. Running new ductwork to second floor. Both the model building codes...