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Need to seal off slab heating ducts
I recently bought a 40 year old house that has heating ducts in the
slab. It occasionally has water leak into the ducts after a lot of rain. It dries up within a couple of days and there is no evidence that there has ever been any mold problems. I just finished rerouting the ducts into the attic (MAJOR job), and removed the slab ducts from the supply feed. Now I need to close off the slab ducts. I have seen other forum posts suggesting filling them with concrete. Filling the entire slab duct would be a lot of concrete and a real pain. I am looking for other (simpler/cheaper) alternatives. One would be to seal off a couple of feet each side of each register with conrete. An even more attractive solution I think would be to use expandable foam (like "Great Stuff") to fill around each register. Does the expandable foam solution have any problems?? Are there other alternatives?? Thanks, JJ |
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