Filling Floor Vents With Concrete

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.

Filling floor vents with concrete.

I have no idea who i should call or what kind of business does this type of repair work. When you pour concrete into slab duct you will have expansion from new cement. The hard part is replacing the flooring itself. 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.

Concrete floor patch fill is a blend of ordinary and specialist cements high quality graded aggregates and a unique combination of polymers and admixtures. If you have floor registers in your basement that mean that the duct work is either in the slab which would be difficult to do with a typical concrete slab being 4 inches thick or it is running in the gravel below the concrete and just coming up through the concrete. Local companies refuse to work on them. If the ducts are way below the slab it may not be necessary and you could fill w sand top off with concrete.

Old metal pipes rust out that they used for slab ducts. 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. Hvac ductwork in floor slabs.

This water is filling the lowest spot under the furnace where all the basement s heat vents connect. 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. The hvac company was going to blow insulation into them and cap them off w a piece of metal. This has caused the metal ducts to rust out and expose the dirt.

Then just fit a piece of sub floor in the opening and screw it onto the 2x4 s. The forced air vents in our floor fill with water whenever it rains. Concrete would add some strength to the slab. My slab from 1952 had dust neighbor has leaches.

Filling the holes is the easy part. Foam may do the same thing. I did not have them do it cuz i have heard from others that they should be filled with concrete. We recently had our hvac system replaced from floor vents to ceiling vents.

Vents buried below a basement floor are new to me. They are metal vents buried and encased in the concrete floor. I would think you need to insert some expansion material to prevent cracking the floor slab.