
Ductwork carries the air from your heating and air conditioning system to all of the conditioned spaces in your house. These ducts, which often encroach on floor and ceiling joists, present only a minor obstacle for the do-it-yourselfer who wants to install insulation.
To insulate around heat ducts in ceilings or floors, cover ducts with insulation so the air temperature in the ducts can be maintained more efficiently.
In basement ceilings, whenever possible, pull the insulation behind any ductwork.
