Whwere To Insulate Ductwork In Attic

In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below.

Whwere to insulate ductwork in attic.

I called out the original hvac company and they took a look and said they saw no water. Because the simplest and cheapest way to insulate an attic is to add material to the floor. 1a attic access door 2. Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water.

Scope when hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Insulation products such as fiberglass duct board duct wrap and duct liner are used to increase indoor comfort by delivering heated and cooled air from room to room at design temperatures controlling condensation and abating sound such as cross talk heard between two rooms or hvac equipment noise. Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct.

Check the speed of the blower motor on the furnace. Today s flexible ductwork is covered with a shiny metallic cover this is its vapor barrier. To insulate the exterior you have a choice between sleeve style insulation and blanket wraps which literally wrap around the ductwork. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.

If necessary switch the wires to reduce the blower to its lowest speed. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. Historically the main impediment to implementing this approach has been the concern that condensation can form on the exterior side of the ducts during the summer making ceilings damp. To install sleeves you must either disassemble the ductwork and slide it on before reassembling the ducts or as many homeowners find themselves doing slit it and wrap it around like the blanket style material.

Hvac ductwork is typically visible in your attic especially flexible ductwork. The shiny vapor barrier will protect the ductwork from sweating as long as it s exposed to the surrounding air. In this case the temperature gradient between supply air and the ceiling can be such that the duct surface could be cooler than the local dew point. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.

In a vented attic this can happen when the duct is in close proximity to conditioned space i e the ceiling and also thermally isolated from the hot attic beneath the ceiling insulation. Plan to pull up the flooring and layer new insulation on top of the old. Perhaps the easiest area to overlook for insulation in the home is ductwork.