Vapor barrier installation in Watsonville CA - a covered crawl space that still drains

Most people call because of a musty smell coming up through the floor, cold floors in winter, or an inspection report on an older house they just bought. What moves the price is the size of the crawl space, how low and tight it is, how much stored stuff and old debris has to come out, and whether there's a water problem to fix before any plastic goes in. The schedule turns on those same things, plus any permit the job turns out to need. If the floor above needs help too, I can look at crawl space insulation on the same visit, and the estimate I write after seeing the space gives you the figure for your house.

I start under the house with a flashlight, looking for where the water's coming from, because plastic won't fix a crawl space that's getting wet. If it's grading that slopes toward the foundation or sprinklers soaking the wall, I'll tell you what needs fixing before we lay anything, the same way you prep a station before you cook. Then our crew clears out stored things, old debris and anything sharp, so the plastic can cover the ground all the way to the edges. We lay it so water keeps draining the way it already does, overlap the seams, and put a tougher layer down along the path someone will crawl to reach the furnace or the pipes. I check the work before we call it done, and we leave the crawl space and your yard as clean as we found them.

Covering the ground handles moisture from below, but a drafty house usually leaks at the top too, so attic air sealing closes the gaps around lights, pipes and the hatch where warm air slips out. If the floors over the crawl space still run cold, retrofit insulation adds insulation to the house you already have without tearing out finished walls or floors.

Whether a crawl space ground cover needs a permit in Watsonville isn't something I'll guess at, because the city decides. The city's Building Division handles permits in one place, and its staff answer questions about home improvement rules at (831) 768-3050. We check with the city or county office that covers your address, and when a job needs a permit, we pull it and line up the inspections.

Water is the bigger question here. In a vented crawl space, most of the moisture is water that runs in from yards graded toward the house, missing drains around the foundation, or sprinklers watering too close to the wall. Near the Pajaro River there's flood history to weigh too, since a 2016 analysis found the levees held back only about a 5-year flood on the river and about a 7-year flood on two of its tributaries. If your crawl space has ever had standing water, tell me, because that gets dealt with before any plastic goes down. We see the same older raised-floor houses on jobs in Gilroy and Salinas, and we handle them the same way.