Crawl space vapor barrier in Simi Valley CA - water fixed first, then the cover
Musty smell, cold floors or puddles under the house? We deal with the water first, then cover the crawl space floor edge to edge.
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Do I need a vapor barrier in my crawl space?
A crawl space vapor barrier is a plastic ground cover laid over the dirt under your house, and it cuts down the moisture coming up into the crawl space. At A&L Simi Valley Insulation Services, we put them in across Simi Valley, and the job starts with any water down there before the plastic goes in.
Most calls about this start with a musty smell, cold floors or a look under the house that turns up damp dirt or a puddle. The price and the schedule mostly come down to four things. The first is how big the crawl space is, and the second is whether water has to be fixed first. The third is how much is stored down there, and the fourth is whether we're covering the ground in a vented space or sealing the whole thing. If the floors above you are cold too, crawl space insulation often comes up on the same visit. I walk the space with you on the estimate and put the scope in writing, so you know what you're getting before anything starts.
How we do a crawl space vapor barrier
On the estimate I go under the house with a flashlight and look for standing water first, because plastic laid over a wet floor just hides the problem. If there's water, it gets fixed before any plastic goes down, and I'll help you work out where it's coming from, whether that's a leaking pipe, a downspout or water running toward the foundation. Next we talk through whether your crawl space stays vented or gets sealed, since that changes the whole job and any gas equipment down there has to be planned for. Once the stored items and debris are out, our crew lays the sheet across the floor and up the walls and piers and laps the seams. I look over the work before we finish.
A crawl space cover often sits alongside other moisture work, and we also do vapor barrier installation in other parts of the house. Air moves up from under the floor and out through the top of the house, so some owners pair this job with attic air sealing, which closes the gaps around pipes, wires and the hatch so less air gets pulled through your rooms.
Crawl space vapor barrier jobs in Simi Valley
Before any work starts, it helps to know who reviews it here. Simi Valley's Building and Safety Division handles plan review and inspections for projects in the city, and it's the office to ask whether your crawl space job needs anything from them. I won't guess at that answer for you. If what they tell you changes the job, we plan around it before the crew shows up.
Under houses here we usually find a raised floor, a crawl space that's turned into storage over the years, and ducts or a water heater someone has to reach. It's much the same on jobs in Moorpark and Thousand Oaks, and we work across the cities around Simi Valley in Ventura County and the nearby parts of Los Angeles County. If you're not sure we cover your city, just ask.
Crawl space covers up close
Get a written scope for your crawl space
Expect a reply within 1 business day. Once you send the form, I'll set a time to walk the crawl space with you, and the estimate is free, at your property and comes with no obligation.
(805) 261-5026Crawl space vapor barrier questions in Simi Valley
What does a crawl space vapor barrier do?
A crawl space vapor barrier covers the dirt floor with plastic, so less ground moisture and fewer soil gases, such as radon, come up into the crawl space. It only does that well when it's installed well. A good question to ask any installer is how the sheet will work with the drainage you already have, since it should leave that drainage working.
Can I just seal my crawl space vents?
No, closing the vent openings on their own doesn't make a crawl space sealed and dry, and it can raise the moisture down there. If a furnace or water heater in the crawl space burns fuel and gets its air from those vents, sealing them can create a deadly situation. A sealed crawl space has to be planned as a whole job, with that equipment dealt with first.
How do I know if my crawl space installer needs a California license?
A contractor needs a California license when the job requires a building permit, uses additional workers, or totals $1,000 or more in labor and materials. You can check a license with the state licensing board online in a few minutes, and it's worth doing with anyone you hire.
Which Simi Valley office handles building review and inspections?
Simi Valley's Building and Safety Division handles plan review and inspections in the city and checks that work meets California's minimum building, electrical, plumbing, mechanical and energy codes. You can reach its front counter at (805) 583-6723 to ask whether your crawl space job needs anything from them.
How much does a crawl space vapor barrier cost in Simi Valley?
The cost comes down to the size of your crawl space and how much work goes in before and around the sheet. Fixing water, clearing out stored items, choosing a heavier sheet and sealing the space instead of leaving it vented all add to it, while a clear, dry, vented space with few piers is the simplest job. I'll walk it with you and write up the scope so you can see what's included.
What is the best thickness for a crawl space vapor barrier?
If someone has to crawl to a furnace, ducts or a water heater down there, a thicker, reinforced polyethylene sheet is usually worth it, because ENERGY STAR's guidance says those materials hold up better. Plain 6-mil sheeting can work, but the same guidance says it needs protection where people reach equipment for service.
Book a crawl space look in Simi Valley
Call (805) 261-5026 or use the form, and tell us if you've seen standing water, whether the vents are open, whether gas equipment sits down there and what's stored, so I come ready.