How To Insulate Duct In Attic

The next best option is to encapsulate the ducts.

How to insulate duct in attic.

Make sure the foil surface of the insulation is free of dust before applying the tape. Energy saver dealers 204 202 views. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards. That s what happened to the ducts in the lead photo of this article.

Use a paintbrush to apply duct mastic to the joints where an elbow. See recommendations for accomplishing this at the building america solution center. Wrap the insulation around the duct allowing the beginning edge to ride up slightly over the previous piece. How to insulate the attic air sealing the attic energy saving attic insulation duration.

This isn t equivalent to bringing them into the conditioned space as you ll still have additional duct load but it s a lot better than having them in unconditioned attic space. If necessary switch the wires to reduce the blower to its lowest. How to insulate your attic duct system step by step with video instructions assess current state of attic insulation. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Measure and cut your duct insulation a little large to allow overlap at every seam both lengthwise and on the ends. Look for signs of air leaks at seams or joints such as streams of dust. The duct work is the backbone of air exchange and ventilation.

Inspect the span of ductwork to be insulated. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. This could and should have been done in the first place but now you have another chance to make it right. Insulation itself keeps warm air in and prevents cold air from infiltrating.

How to insulate your central air heating ducts 1. When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm. Bury the ducts deeply in insulation. Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket.

Check the speed of the blower motor on the furnace. Sure up leaky duct joints.