Insulating Ductwork In Attic Venting

For diy attic insulation you ve got two choices.

Insulating ductwork in attic venting. When water condenses and drips into your attic or home it can cause a some serious secondary problems. Master flow 14 in. Loose fill or batt the common term for blanket insulation. We insulate the bath vent ductwork to minimize the condensation that will otherwise occur as warm moist bathroom exhaust air.

W insulation wrap. Wrap the insulation around the duct and then pinch the seam closed. Hercules see all. Insulate the bathroom exhaust vent fan ducts.

This additional insulation provides greater thermal efficiency to save energy. 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. Apply a long strip of foil tape along the seam in the insulation.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Why is this a problem. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal.

Secure the insulation with short strips of foil tape. Both can be added to uninsulated attics or layered over existing material. So water is condensing on your ac ducts. 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.

Model f8ds14 27 86. 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. If the insulation around your vent hood duct work becomes waterlogged because of a roof leak or similar problem the insulation s effectiveness will be compromised. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct.

Repeat to insulate the remaining ducts. L x 16 in. 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. Insulated flexible duct r8 silver jacket is used in standard heating and air conditioning hvac systems and some venting applications.

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. The duct has r8 insulation which contains 50 more insulation than the standard r4 2 product. 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. Why is condensation on ductwork a problem.

Unitherm univest insulation jacket high temperature 25 in. The master flow 6 in.