The two most common ways to insulate ductwork are.
Outer plastic wrap of attic air ducts.
In hot attic spaces or where exposed to uv light the plastic of this flexible air conditioning duct material disintegrates leaving its fiberglass insulation exposed to also disintegrate leak or possibly blow into the building living space.
You ve looked at few websites and you ve noticed quite a few feature this kind of statement.
The shiny vapor barrier will protect the ductwork from sweating as long as it s exposed to the surrounding air.
Ed mack of air duct professionals in lake elsinore california creates estimates based on the number of ducts to be installed.
No air should be able to penetrate the ductwork and the joints are a natural weak point.
The reason ductwork is exposed is because.
If your ductwork is over 15 years old you probably should replace it.
Pull the outer liner of the duct up to the outer liner of the trunk line or fitting.
Wrapping the duct in a foil faced blanket.
Often pricing per duct run ranges between 150 and 250 from air duct professionals mack explains that a typical single family home may need 6 10 duct runs.
Make sure the flex duct insulation comes in full contact with the insulation on the trunk line or fitting such as a duct boot that it is being attached to.
Ductwork has a maximum lifespan of 20 25 years.
The ductwork should be installed so that it is in direct contact with the ceiling and or truss lower cords.
Reposition the foil outer insulation to cover the hole as much as possible.
If the ducts must be located within a vented attic one option for protecting the ducts and helping to minimize heat transfer between ducts and the unconditioned attic is to lay the ducts on the attic floor and cover them with the same blown insulation that is used to cover the attic floor.
Applying spray foam insulation to the outside of the duct.
Also make sure to use hvac tape and seal all of the joints between duct segments.
Hvac ductwork is typically visible in your attic especially flexible ductwork.
Pull the insulation and outer liner of the flex duct up over the collar.
Today s flexible ductwork is covered with a shiny metallic cover this is its vapor barrier.
Cut pieces of foil insulation tape seal up the.
If you need help deciding which type of insulation you need set up an energy consultation.
Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating ventilating and air conditioning ducts and plenums operating at temperatures between 40 f 4 c and 250 f 121 c.
Does ductwork go bad.
Replacement of the duct work is required a significant expense.
The insulation you use to wrap your ducts should leave no gaps and be at least two inches thick to work effectively at reducing or eliminating condensation on ductwork.
