Insulating Ducts In Crawl Space

Strip of foil and secure it with aluminum tape photo 2.

Insulating ducts in crawl space. Things to consider when addressing your duct work. You can either insulate the exterior walls of the space or the ceiling of the crawl space under the floor of your home. How to insulate furnace ductwork in a crawlspace 1.

They will then spiral nylon string fiber tape around the insulation to permanently hold it in place. To insulate the crawl space i would use a closed cell two pound 907 gram spray foam because it will act as both your vapour barrier and insulation. When you aren t heating the air twice to get your home to the right temperature you ll save on your utility bills.

Round vs rectangular i always seal any seams in the insulation with foil tape. Duct work is the delivery system of your home. Insulating ducts reduces the load on your furnace.

There are several products but i tend to go with the high density foil backed fiberglass wrap most of the time. Where to install crawl space insulation. To the total and cut the insulation to that length.

Those ducts are from the seventies and are not sealed and were poorly insulated wrapped and stapled with thin layer of plastic covered fiberglass but no seams taped and lots of gaps. Finally installers will spiral wrap the ducts to building code with r 11 insulation. My house has a downdraft system that feeds supply ducts in my uninsulated crawl space.

The worst gaps are the boots at the end of the run going up through the floor next to my exterior walls. A main consideration in deciding is whether or not the space is ventilated. A temperate lower area that will keep upper floors warm while your home s foundation remains in sound condition.