Duct Sealing in San Mateo, CA

Duct sealing in San Mateo homes

The symptom is usually dust. You wipe the registers, and gray film returns in days. Or the furnace kicks on and the house smells like crawlspace. Both point the same direction: air is entering the system where it shouldn't. On the mid-Peninsula that air comes from a vented crawlspace, a wall cavity, or a garage where the furnace sits.

Leakage concentrates at a few predictable spots: boots where they meet the subfloor, plenum seams at the furnace, flex collars at the takeoff. Flex needs the inner liner banded to the collar, mastic over it, then the outer jacket strapped separately. Cloth duct tape fails here. It dries out and peels. Mastic or UL 181 foil tape holds.

Panned floor-joist and wall-stud returns are the hard case. They are framing, not duct. Sealing the pan edges helps, but these cavities pull from everywhere. Sometimes replacing the run with sheet metal is the answer.

Two situations stop the work. Asbestos tape on old gravity octopus trunks goes to abatement, not to us. Sagging flex pooled in the crawlspace belly gets rehung first. Mastic will not stick to damp, dirty metal, so condensation gets addressed before anything is sealed.

What Happens After You Call Us

Step 1

Call and tell us what you're seeing, dust on the registers, weak airflow in the back bedrooms, a dryer that needs two cycles. We book a two hour arrival window and text you when the van is twenty minutes out.

Step 2

We open the furnace closet, pull a register or two, and look at the crawlspace or attic runs first. The estimate is free, and you get one firm number for the supply and return count we actually find.

Step 3

We clean the lines, check airflow at each register, vacuum up anything we tracked in, and show you before and after photos. You pay the number we quoted, even if the crawlspace runs longer than expected.

Same-day duct sealing available in San Mateo, CA.

Call (415) 251-5692

Serving San Mateo, CA and Surrounding Areas

Also serving: Redwood City, San Bruno, Burlingame, South San Francisco, Menlo Park, Foster City, San Carlos, East Palo Alto, Belmont, Millbrae, North Fair Oaks, Hillsborough

Other air duct cleaning services

Air Filter Replacement: We swap out your dirty filter with the right size and rating for your system, so San Mateo homes get cleaner air and less strain on the blower.
Coil Cleaning: If your AC is running longer and cooling less, we'll clean the coils at your San Mateo home and let you know what we find.
HVAC Duct Cleaning: If dust keeps returning after you clean or the vents smell musty, we'll clear your San Mateo ductwork and show you what came out.
Air Vent Cleaning: We clear dust and debris from your vents and registers across San Mateo, so you're not breathing it in every time the system kicks on.

Need duct sealing today?

Available today in San Mateo, CA. We give you the price before any work starts.

Call (415) 251-5692