Sealing Ductwork In Attic

Snap a plastic cap onto the duct end to keep the insulation from snagging then slip the pre formed piece over the duct.
Sealing ductwork in attic. Sealing ductwork from the inside out is a much more complicated process and will likely require hiring a professional. I called out the original hvac company and they took a look and said they saw no water. It s easy to overlook electrical wires ducts pipes and vents in the attic but the openings around these are holes can compromise the air sealing of your attic. Seal fireplace and furnace holes.
Locate the source of the thermal leaks by inspecting the ductwork while the air conditioner is running. Make sure the duct is secure in place and wait for it to dry. To seal ductwork from the inside. 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.
Sealing ductwork is an easy diy project you can do this weekend. Sealing your ductwork can shave 20 off your energy bills. The attic ductwork is flex duct work. Steps to sealing attic air ducts.
Apply a generous amount of sealant mastic over the thermal leak. We make your home or building more comfortable in the continental us and canada. Set up your free estimate contact us today. Seal attic floor holes.
To seal these openings use caulk or spray foam. Use zip ties to secure any loose ducts to the attic floor. Gently pull the insulation over the entire length of duct. For larger holes filler material may be needed.