For an extra layer of protection use a paintbrush to apply a coat of duct mastic.
Fixing ductwork attic.
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.
Most modern ductwork comes standard with insulation and a vapor barrier so my recommendation would be to just replace your ductwork.
Spraying foam insulation on the roof deck is the most popular method to do this.
Step only on the joists or lay plywood across the joists to allow you to move safely through your attic.
Once you ve found the leak use foil duct tape to cover the gap and seal the leak.
Duct system testing including air flow and leakage tests.
Our ductwork solutions include.
Flexible duct is a plastic tube that is reinforced with wire and then insulated on the outside.
It s effective but not cheap.
The really bad news is that with old metal duct systems the only option is replacement of the ducts to stop the rain in the attic.
Climb into your attic.
Cover the damage with the tape.
It was new when the ac was put in 7 years ago.
To hire a duct and vent professional to install or remove your ducts and vents you are likely to spend between 80 and 150 total.
All parts you need can be purchased at home depot or lowes.
Otherwise moisture will build up and you can face possible mold problems in your attic.
Move insulation away from the ducts if necessary.
The price of a duct and vent professional can vary depending on your area.
Leaks in ductwork are often found where lines branch off or separate.
Cut a piece of foil tape large enough to cover the damage to the internal duct.
The next most typical type of duct systems is made of flexible duct.
How to splice two pieces of ductwork together.
Quick and easy fix.
If you re in a humid climate burying ducts in the insulation could lead to condensation and ceiling damage.
Duct sealing to eliminate leaky ducts and improve efficiency.
The attic ductwork is flex duct work.
Energy saver can identify and repair all of your ductwork issues.
The next step is to ensure that you add a vapor barrier to your ductwork.
Flex ducts themselves do not sweat however if the connection points are not sealed correctly and duct leakage is occurring then you can get sweating at those points.
With the furnace fan running you can feel air escaping the duct.
I called out the original hvac company and they took a look and said they saw no water.
Duct insulation in unconditioned spaces to prevent heat loss and improve hvac efficiency.
How to fix tear in ductwork.