Air Duct Repair in San Rafael, CA
Call (415) 223-3423
Air duct repair in San Rafael homes
One room never gets warm. The register breathes, but barely. In most San Rafael houses that is not the furnace. It is a supply boot that fell off its takeoff under the floor. Crawlspaces here are vented and damp, open to rodents. Flex gets torn at the collar. Inner liner slips, outer jacket stays inflated, and the duct looks fine from three feet away. We pull it off and look inside.
Pre-1940 Marin homes converted from gravity heat carry a different failure. Big sheet metal trunks with cloth-taped joints feed one undersized central return. Those joints dry out and open. The trunk then pulls crawlspace air, which is why startup smells musty on foggy mornings. Repair there means mastic and mesh on real metal, not a wrap of tape.
Ross Valley and hillside addresses see rodent nesting in trunk lines. Droppings must come out before any sealing. Sealing contamination in is worse than leaving it.
1970s-90s tract and condo flex off a metal plenum usually fails at the plenum collar or sags into a long belly. We re-strap, re-support, and shorten the run where the framing allows.
Repairs that only buy a season are not worth doing. We will say so and show you the duct.
Same-day air duct repair available in San Rafael, CA.
Call (415) 223-3423What happens after you call us
- 1
Call and tell us how many supply registers you have and where the furnace sits, crawlspace, attic or closet. We book a two hour arrival window and text you the tech's name before he leaves the shop.
- 2
He walks the house first, pulls a register cover, checks the return and the trunk line, then gives you one firm number. Vent count, flex versus sheet metal, and crawlspace access move that price.
- 3
We tape off the registers, run the vacuum under negative pressure, test airflow at every supply, and put the covers back clean. You pay the number you were quoted, nothing added after the fact.