Sealing Floor Ducts

Floor ducts are effective because they deliver heated air at floor level.

Sealing floor ducts.

I just discovered that the air ducts in my concrete slab have problems. That is where the duct sealer comes in. Use fiberglass mesh tape and mastic where gaps are larger than 3 8 inch. The tape does a great job sealing but as the metal expands and contracts with seasons it can begin to come loose.

Heat must travel a shorter distance and enters. This is one of those things that can go unnoticed but have. I have galvanized air. Today s technology enables you to seal your entire air duct system from the inside.

Use caulk for gaps that are less than 3 8 inch. Use your putty knife to generously coat the aluminum tape with duct sealer. If you really want to seal all of your air ducts you will need to contact a professional. Watch this video for more tips to seal air ducts.

Diy duct sealing only goes so far. Floor vents are typically used in homes where the furnace is in a basement or the ducts the piping from the furnace travel through an underground crawlspace. Seal the seam between the duct boot and the flooring or sealing framing and finish material. How to seal duct boot to ceiling with fiberglass mesh tape and mastic for gaps larger than 3 8 inch.

Only qualified contractors should perform changes to your duct system. If you live in a house with a crawl space there is a good chance the floor vents are not sealed.