Air sealing all the ducts and air handler connections and seams and air sealing all the duct boots to the ceiling gypsum and any other penetrations is a critical first step prior to adding any insulation.
Attic duct boot pictures.
Peel off part of the backing.
If the ducts are going to be concealed all seams need to be taped or caulked.
Secure the fiberglass insulation in place around the boot with foil faced duct tape.
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.
The next most typical type of duct systems is made of flexible duct.
The foam does have an advantage in that while the boots are being foamed one can also seal the joint between the boot and where the boot is mounted ceiling wall floor.
Flex ducts themselves do not sweat however if the.
Cut a piece of foil tape to length.
Today i bring you a few photos that are signs of a bad duct installation.
Btw they offer 5 year warranty on their work.
The attic ductwork is flex duct work.
Flexible duct is a plastic tube that is reinforced with wire and then insulated on the outside.
Finally pull down on the backing which will pull the tape along.
Also they are detail oriented the clean up and rodent proofing work were completed with care.
Jump ducts which do not directly deliver conditioned air from the hvac unit may be located in attics if all joints including boot to drywall are fully air sealed with mastic or foam and the jump duct is fully buried under the attic insulation.
I ve searched the forum and it looks like i do not have insulated boots and when i went up to the attic today i noticed the boot was cold to the touch and had a small draft coming from where the boot meets the sheetrock of the ceiling.
Either duct wrap the boots or foam them.
Last month while i was in austin homebuilder extraordinaire matt risinger gave me a tour of some of his projects.
This way there is no infiltration at this point.
Pictures of the roof vents turbine vents.
I was thinking of using great stuff and sealing around the boot.
There are two main ways to solve this problem.
A homeowner in atlanta was getting a home energy upgrade and one part of it was getting a.
The point about testing expansion is a good point to consider.
They did a good job and the charge was reasonable.
They helped us replace air ducts and boots on the attic install a new furnace flue pipe bubble wrap the furnace plenum box seal all joints well.
Afterward i wrote about something i saw on his new home construction site that was a sign of a good duct installer.
4 if your round air ducts run below the joists lay one insulation batt on top of the duct.
Slide the backing up and over the pipe.
Here s bob s trick for taping a seam on a pipe that s installed close to the subfloor.
The air in your vented attic is hot and humid just like all outdoor air in florida.