Sealing Floor Ducts

I just discovered that the air ducts in my concrete slab have problems. Make sure the sealer extends below the bottom of the tape but do not put any on your floor. Floor ducts are effective because they deliver heated air at floor level.

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Only qualified contractors should perform changes to your duct system.

Sealing floor ducts.

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. An odor alerted me to standing water debris and even a dead animal in the ducts below my floor. This is one of those things that can go unnoticed but have. Use caulk for gaps that are less than 3 8 inch.

Use fiberglass mesh tape and mastic where gaps are larger than 3 8 inch. If you live in a house with a crawl space there is a good chance the floor vents are not sealed. Use your putty knife to generously coat the aluminum tape with duct sealer. I have galvanized air.

The tape does a great job sealing but as the metal expands and contracts with seasons it can begin to come loose. How to seal duct boot to ceiling with fiberglass mesh tape and mastic for gaps larger than 3 8 inch. Today s technology enables you to seal your entire air duct system from the inside. Watch this video for more tips to seal air ducts.

The heat then rises and continues to warm the rest of the room. If you really want to seal all of your air ducts you will need to contact a professional. Diy duct sealing only goes so far. Heat must travel a shorter distance and enters.

Seal the seam between the duct boot and the flooring or sealing framing and finish material. That is where the duct sealer comes in.

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