Insulating Ductwork In Attic Venting

So water is condensing on your ac ducts.

Insulating ductwork in attic venting. Both can be added to uninsulated attics or layered over existing material. Why is this a problem. 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. For diy attic insulation you ve got two choices.

We insulate the bath vent ductwork to minimize the condensation that will otherwise occur as warm moist bathroom exhaust air. Secure the insulation with short strips of foil tape. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Why is condensation on ductwork a problem. Hercules see all. Loose fill or batt the common term for blanket insulation. W insulation wrap.

In un conditioned space such as an attic where otherwise your fan duct will be exposed to cold attic air in winter use insulated solid metal ducting or insulated flex duct. Dia x 5 ft. The 1 800 square foot brick ranch in climate zone 4 dates from the 1960s but the previous owner installed both a furnace and ductwork in the attic just four years ago. Apply a long strip of foil tape along the seam in the insulation.

Just as is the case with insulation in other parts of your home you should regularly inspect and maintain the insulation on your duct work. First water dripping off of your ducts and onto your insulation can cause the insulation to compress which decreases it s r value or ability to insulate. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Length ductwork insulation sleeve r 8.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. The duct has r8 insulation which contains 50 more insulation than the standard r4 2 product. L x 16 in. Repeat to insulate the remaining ducts.

Model f8ds14 27 86. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct. Master flow 14 in. This additional insulation provides greater thermal efficiency to save energy.

Ted also has inherited a powered attic ventilator. Insulate the bathroom exhaust vent fan ducts. Insulated flexible duct r8 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications. Unitherm univest insulation jacket high temperature 25 in.

Wrap the insulation around the duct and then pinch the seam closed. The master flow 6 in.