Filling Floor Vents With Concrete

I have no idea who i should call or what kind of business does this type of repair work.

Filling floor vents with concrete.

This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs. Local companies refuse to work on them. The hvac company was going to blow insulation into them and cap them off w a piece of metal. When you pour concrete into slab duct you will have expansion from new cement.

Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as. Then just fit a piece of sub floor in the opening and screw it onto the 2x4 s. Now i have these vents in my floor we are on a slab no basement or crawl space and i need to do something with them. When mixed with water it produces putty like mortar with good wash out resistance and a powerful bond onto wet concrete substrates.

Someone said i should seal the floor vents and install new vents in the ceiling but that sounds very expensive and i would prefer to keep my floor vents. Vents buried below a basement floor are new to me. I would think you need to insert some expansion material to prevent cracking the floor slab. The forced air vents in our floor fill with water whenever it rains.

Foam may do the same thing. Old metal pipes rust out that they used for slab ducts. The hard part is replacing the flooring itself. We recently had our hvac system replaced from floor vents to ceiling vents.

Concrete floor patch fill is a blend of ordinary and specialist cements high quality graded aggregates and a unique combination of polymers and admixtures. This water is filling the lowest spot under the furnace where all the basement s heat vents connect. Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories. You put a scrap of 2x4 under the floor across the hole on each side and run screws through the existing subfloor to fix the scrap in place.

Filling the holes is the easy part. If the ducts are way below the slab it may not be necessary and you could fill w sand top off with concrete. This has caused the metal ducts to rust out and expose the dirt. My slab from 1952 had dust neighbor has leaches.

Hvac ductwork in floor slabs. Concrete would add some strength to the slab. I bet it wouldn t take all that much concrete to fill them anyway and it would be much easier to pump it than to mix it by hand.