Duct Sealing in Elk Grove, CA

Duct sealing in Elk Grove homes

Back bedroom never cools. Attic air smells dusty when the system kicks on. Your bill climbed and nothing else changed. That is usually leakage, not a weak condenser. In post-1985 tract homes here, the common culprit is a takeoff that pulled loose at the trunk. The flex collar slips, the strap stays, and the boot now draws hot attic air with blown-in cellulose or fiberglass riding along.

Sealing is not tape. Cloth duct tape dries out in a hot attic and lets go. Proper work means mechanical fastening first, then mastic brushed over the joint, then the inner liner and vapor jacket restored over it. Crushed and kinked runs get re-supported, not just sealed. A sagged belly holding settled valley dust gets lifted and strapped so it drains air cleanly.

Pre-1960 homes near the river corridors and older central neighborhoods are sheet metal in crawlspaces. Separated joints, cracked mastic, winter crawlspace moisture, rodent nesting debris pulled indoors. Those get sealed at every seam and boot-to-subfloor connection.

Honest limit: 1960s–70s fiberglass ductboard that is eroding and shedding at the seams should not be sealed. Mastic over crumbling board buys a season. Replacement is the real answer there, and we will say so.