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.
Duct losses to outdoors.
This way there is no infiltration at this point.
Even if the duct and boot have some insulation these components are rarely sealed.
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.
Wooden house with metal roof attic air duct balcony rain gutter.
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.
I will use a combination of doors and windows great stuff and the normal expanding great stuff.
If the walls are framed with 2x4s there s often not enough space even for a little bit of duct insulation.
Ventilation specialist assembling air duct pipe system in attic of new construction of residential building male contractor binding ventilation pipes with duct tape.
The boot boxes are sized to deliver the proper cfm to each room of the structure.
They are usually the same size as the loop duct.
The following pictures show the process.
Also they are detail oriented the clean up and rodent proofing work were completed with care.
Supply duct system locations decisions regarding the location of a supply air dis tribution system should be made based on the.
As most of the duct installs here are in the attic with insulated boots it then becomes the hole where the boot pentrates the ceiling that becomes the dewpoint concern.
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.
The point about testing expansion is a good point to consider.
Btw they offer 5 year warranty on their work.
Most supply boots here in my area are insulated.
Wooden house with metal roof attic air duct balcony roof gutter duct specialist installing air vent system.
Because my roof was a 3 12 pitch the attic space is real cramped and the supply ducting filled it up leaving little room for the return ducting.
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.
Only older heating only systems have uninsulated boots.
When you put a duct and a duct boot in the cavity you don t have room for insulation.
Oversized cuts for boots that are not mastic sealed.
Either duct wrap the boots or foam them.
Size duct the loop is fed by four or more ducts radiating out from the central plenum.
Attic ducts buried in cellulose cz5a cz6a.
Pictures of the roof vents turbine vents and attic from both the interior and.
They did a good job and the charge was reasonable.
