Cover for a vented crawl space
If your crawl space has open vents and a dirt floor, we lay plastic over the dirt across the whole floor and leave the vents working, which keeps the job simple.
Vapor barrier installation in South Pasadena CA - less ground moisture under your home
A musty smell or a bare dirt crawl space under your floors? We cover it so less ground moisture rises into your house.
- Licensed and insured.
- Free quotes on site.
- We respond within 1 business day.
Vapor barriers for slabs and crawl spaces
Vapor barrier installation in South Pasadena means laying plastic sheeting across the ground under your house, so less moisture from the soil works its way up toward your floors and the rooms above.
In the older houses we see around South Pasadena, the usual picture is bare dirt under the crawl space hatch, or thin plastic someone put down years ago that has since torn or shifted. What moves the price is the size of the space, how much has to be cleared out first, whether old sheeting has to come up, and whether you want a simple cover in a vented crawl space or a sealed one, which is a bigger job. The schedule turns on the same things, plus whether your city wants a permit and an inspection, and once I've looked, I put the work in writing so you can compare it fairly.
I look before we talk materials
I come out to see your crawl space or slab myself before anyone recommends a product, because the right fix depends on what's actually down there, not on what we happen to stock.
A written estimate you can compare
The work goes on paper before anyone opens the hatch, so you understand what you're paying for and can set it beside another contractor's quote on fair terms.
I walk the finished job with you
Our install crew does the work, and I walk the finished job with you before we call it done, so you can see the coverage for yourself rather than take our word for it.
How we approach a vapor barrier job
I start by finding out whether your house sits on a slab or over a crawl space, and if it's a crawl space, whether it's vented, because each of those is a different job with a different plan. If someone already put plastic down, I'll tell you honestly whether patching it makes sense or whether it's far enough gone that starting over is the better use of your money.
Before the plastic goes in, our crew clears out stored items and debris so the cover can reach every corner of the floor, and you're welcome to empty the space ahead of time if you'd rather handle your own things. We lay the sheeting so water still drains the way it always has down there, because a cover that traps water under it only moves the problem.
I care a great deal about doing things in the right order, so if you're also thinking about retrofit insulation for an older house, I'll tell you where the vapor barrier fits before any of it starts. The same thinking applies up top, where attic air sealing closes the gaps around lights, pipes and the attic hatch before new insulation goes over them.
Which vapor barrier job fits your house
A sealed crawl space
If you'd rather close the vents and keep the crawl space tighter, the cover becomes part of that sealed space, so it's a bigger job and one I'll walk through with you first.
Barrier under a new slab
For an addition or any new slab, the plastic goes beneath the concrete on top of a gravel layer that helps water drain away, so it has to be in before the pour.
Getting ready for floor insulation
If the floors over your crawl space feel cold, the ground cover usually goes down before any insulation work under the floor, so new material isn't sitting over damp dirt.
Get a written vapor barrier estimate
Send the form and we'll reply within one business day to set a time for me to come out, look at the space and write up a free estimate, with no obligation to go ahead.
Tell us your foundation type
If you know whether the house sits on a slab or a crawl space, and whether that crawl space has vents, mention it in the form, because it tells me which job to plan for.
Clear a path to the hatch
Moving anything stacked in front of the crawl space hatch before I visit lets me get under the house and see the floor, which is what the whole estimate is built on.
Mention the rest of the house
If you also have a hot upstairs or a high power bill, tell me in the form, so I can look at the attic too and tell you honestly what to fix first.
Examples of crawl space and insulation work
These example photos show the kinds of ground covers, crawl space layouts and insulation finishes we can talk through when I visit your house.
Vapor barrier questions from South Pasadena owners
Plain answers to the questions that come up about vapor barriers, permits and who may do this work in the city.
What does a vapor barrier do for my home?
A vapor barrier is a plastic cover laid across the whole crawl space floor, and when it's put in well, it helps keep moisture from the soil, and soil gases such as radon, from working up into the house. That's why full coverage matters more than anything else, and why we take it right to the edges.
Should my crawl space stay vented or be sealed?
Either can work, and the choice decides what the cover has to do. In a sealed crawl space, the plastic becomes one continuous layer that slows air as well as moisture, and the federal weatherization guide seals its seams and pipe openings only in that kind of space. I'll explain which suits your house, and the work is backed by our satisfaction guarantee.
Do I need a permit for a vapor barrier in South Pasadena?
Ask before work starts, because the city's permit list says insulation needs a permit but doesn't name vapor barrier installation. Applications go through the city's online portal, and the Permit Technician at the city's building office answers questions at (626) 403-7224 or permittech@southpasadenaca.gov. When a job needs a permit, we take care of the application and set up the inspection.
Who can legally install a vapor barrier in South Pasadena?
A licensed contractor, unless the job is very small, because the state lets an unlicensed person take on work under $1,000 only when it needs no permit and they have no employees. The city also requires contractors and subcontractors to hold a South Pasadena business license, so it's fair to ask any crew about both. We're licensed and insured.
What hours can construction crews work in South Pasadena?
In most of the city, construction work can run from 8:00 a.m. to 7:00 p.m. on weekdays and 9:00 a.m. to 7:00 p.m. on Saturdays. On Sundays and holidays the city recognizes, the window is 10:00 a.m. to 6:00 p.m., and we schedule your job inside those hours so your neighbors aren't hearing us outside them.
Related insulation work for your house
Tell us what's under your house
We're based in South Pasadena and work in Pasadena, Alhambra, Glendale and nearby cities, so call (626) 597-0202 or send the form today.