Crawl space insulation in Hawthorne CA - warmer floors and nothing hidden underneath

Insulating a crawl space in the Los Angeles area usually costs about $1,700 to $7,500 for the whole job. Where yours lands depends on the size of the space, floor or walls, batts or foam, and whether old material, mold or pipe wrap has to be dealt with first. For most floors I'd seal the holes and fit batts, because foam costs more, and I'd save foam for when ducts run down there or we're doing the walls.

Sealing and insulating the crawl space walls is considered best practice in every climate, but in some houses the floor above works better as the line that keeps the heat in. Which one fits depends on how your crawl space is built and what's down there, like ducts or a water heater. Get that answer before you compare prices, because two estimates for different spots aren't the same job.

No, closing the vents by itself won't make a dry, sealed crawl space, and it can trap more moisture under the house. It can also turn deadly if a furnace or water heater that draws its air naturally sits down there, because that equipment depends on air from the crawl space. Turning a vented crawl space into a sealed one takes more work than that, which is why vent changes wait until I've looked at everything below the floor.

Have the right specialist look at it first, because mold needs a certified mold remediation expert to inspect it and set a cleaning plan, and old wrap on ducts and pipes can contain asbestos that a certified asbestos abatement firm has to inspect and treat. Plan for that step, since the insulation waits until it's done. If animals have been getting in, ask whether your estimate includes a rigid cover over the insulation, which energy guidance recommends where the crawl space is open to pests or the outside.

For almost any crawl space job, yes. State law lets someone without a license take on minor work only up to $1,000, and only when the job needs no permit and they have nobody working for them on it. So a crew under your house should be working for a licensed contractor, and we're fully licensed and insured.

Yes, the state's energy code covers adding insulation to an existing raised floor over a crawl space. The standards for a home's outer shell depend on the climate zone the house sits in, so the insulation for a Hawthorne home is chosen to match its own zone. We're based in Hawthorne and do this work in the cities around it too, like Lawndale, Gardena, Torrance and El Segundo.