Ductwork Installation In Attic

Heaping insulation over the ducts is fine in dry climates but can cause condensation on the duct insulation jacket in humid climates.

Ductwork installation in attic.

From air handler installed in a house or in attic. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. Choose properly sized ducts. Adding heat runs in a basement may change the airflow in the ductwork going to other rooms.

Each register should have its own damper that can be accessed for adjustment. Burying ducts in attic insulation. This is an especially relevant tip for flex ducts more on that in a. How to properly install ductwork in an attic tip 1.

House is very big and spacious and there are not enough walls for all heat runs and cold air returns. Give your ducts the proper support. You shouldn t install ducts in a vented unconditioned attic. Expect to pay 35 55 per linear foot including labor and materials.

Made from 1 to 2 inch thick sheets of rigid glass fiber and coated with an aluminum laminate for a moisture air barrier duct board comes in. My floors have soaked the moister from the condensation of air vent that now it has rotten my joist where the vent touched them and subfloors are as well. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Joints 1 are attached and the ducting is connected to vents and your hvac system.

Contractors will plan the lines of ductwork needed according to your lighting then cut the ducting to fit the planned lengths. Install dampers at the registers to adjust airflow. My home is 20 yrs old. When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space.

Should i have the ducts lowered away from joist a few inches. From furnace installed anywhere in a house or in attic. Ductwork installation will almost always take place in your attic. If those dampers can t be accessed from below you ll want to install them close enough to the register so that you can reach them through the register opening.

Here is my problem. I have my duct work in the crawlspace of my home its about a 4ft crawl. The doe s building america program recommends beds buried encapsulated ducts. There are several reasons for running ductwork in attic.

As most gba readers know ducts belong inside a home s thermal envelope not in an environment that s cold in the winter.