Duct Sealing in Independence, MO

Duct leaks specific to Independence houses

Old Town and the blocks near the Truman home hold converted gravity furnaces. The original octopus trunk stayed. Big round sheet metal, wrapped in paper or canvas. That wrap can contain asbestos. We do not sand it, cut it, or tape over torn sections. Sampling comes first. Sealing happens at the joints we can reach safely, or not at all.

Postwar ranches south of Truman Road use panned joist returns. The floor cavity is the duct. It opens into rim band, stud bays, sometimes a garage wall. Run the blower and hold tissue at the furnace door gap. Watch the pull direction.

Stone and block basements in Fairmount and Sugar Creek leak at the rim, not the trunk. Mortar joints breathe. A panned return above them drags that air in. Sealing the duct without sealing the band joist just moves the problem sideways.

Tightening returns changes basement pressure. If you have an atmospheric water heater or an old chimney-vented furnace, draft must be rechecked after. Jackson County sits in a radon-prone region, so a post-work radon test makes sense. Independence runs its own electric utility, so rebate rules differ from Evergy territory.

Some panned returns cannot pass. Hard pipe replaces them. We say so instead of caulking a bad design.