Ductwork Installation In Attic

Ductwork installation will almost always take place in your attic.

Ductwork installation in attic.

From furnace installed anywhere in a house or in attic. Duct board much like the duct liner is also a fiberglass product. Burying ducts in attic insulation. Joints 1 are attached and the ducting is connected to vents and your hvac system.

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. 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. Choose properly sized ducts. Contractors will plan the lines of ductwork needed according to your lighting then cut the ducting to fit the planned lengths.

My home is 20 yrs old. Heaping insulation over the ducts is fine in dry climates but can cause condensation on the duct insulation jacket in humid climates. There are several reasons for running ductwork in attic. Install dampers at the registers to adjust airflow.

House is very big and spacious and there are not enough walls for all heat runs and cold air returns. Adding heat runs in a basement may change the airflow in the ductwork going to other rooms. The doe s building america program recommends beds buried encapsulated ducts. You shouldn t install ducts in a vented unconditioned attic.

How to properly install ductwork in an attic tip 1. By spraying closed cell foam on the ducts before burying them in attic insulation you prevent the condensation problem. Give your ducts the proper support. 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.

I have my duct work in the crawlspace of my home its about a 4ft crawl. One of the most common mistakes when installing attic ductwork is choosing. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. This is an especially relevant tip for flex ducts more on that in a.

From air handler installed in a house or 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. Should i have the ducts lowered away from joist a few inches. 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.