Slab foundation building in Novato CA - floors that stay dry on ground that moves
Building on ground that swells, shrinks or stays wet? We pick the slab that suits your lot and keep moisture out of your floors.
What slab foundation building does for your house
A slab foundation is a concrete slab poured on prepared ground, and it carries the whole house. A vapor retarder goes under it, a sheet that keeps ground moisture from working up into your rooms. If your plans call for a raised floor instead, that's our foundation installation work.
Some ground around here is hard on slabs. The tidal marshes along the bay edges hold deep, very poorly drained soil, and Novato clay swells and shrinks with moisture, which a state study says can damage foundations and slabs. We're based in Novato and work across Marin and nearby Sonoma County, so before anything else I go over which kind of slab suits your lot and how it handles that movement.
Price moves with the slab's size and thickness, the steel in it and how much grading the ground needs, and the schedule turns on that prep and the cure. I'll give you your own number on site. People most often want to cut the subgrade, the packed ground the slab sits on, because nobody sees it once the concrete's down. We dig out and pack it here just like we would for a concrete parking lot, because a slab is only as good as what's under it.
Slab foundations built for your ground
You get a slab chosen for the ground under your house and a dry layer beneath it, backed by our satisfaction guarantee.
- The owner on site from estimate to final walk-through
- Slab type matched to how your ground moves
- Moisture layer checked and any tear patched before the pour
- Licensed and insured on every job we take
- In business since 2023, after learning on other crews' jobs
How we build your slab foundation
Call or send a message
Call (628) 209-1066 or send the form with your address and roughly how big the slab is, and we'll set a time for me to come out.
I look at your lot
I come out myself, walk the site, ask how you'll use the house or addition and check where the water runs, then give you an estimate.
We prep, pour and walk it
Once you say go, we handle the paperwork, dig out and pack the ground, set the moisture layer, pour, clean up and walk the finished slab with you.
Tell us about your slab and build
Send your address and rough slab size in square feet, or call. We reply within one business day, and the on-site estimate is free with no obligation.
Questions about slab foundations in Novato
How much does a slab foundation cost in the Bay Area?
A reinforced concrete slab in the Bay Area usually costs about $9 to $16 per square foot. That's the going range for the slab itself, and tearing out old concrete, clearing trees or rock, or a long haul to the site pushes it higher.
Is a post-tensioned slab right for my lot in Novato?
It's worth a look if your ground swells and shrinks, because a post-tensioned slab, one squeezed tight by tensioned steel cables, resists that movement better than one without it. The post-tensioning trade group calls it cost-efficient on that soil and says it cracks less and keeps cracks tight, so less water and fewer bugs get in.
How soon can we walk on a new slab foundation?
You can usually walk on it within 48 hours. Concrete takes 28 to 30 days to fully cure, the slow hardening that gives it full strength, so plan on about a week before heavier loads go on it.
How does a slab foundation keep moisture out of my floors?
A vapor retarder under the concrete stops ground moisture from rising, and one maker's paper says a well-installed one cuts or ends indoor moisture problems. The same paper warns that even small holes can sharply raise the moisture coming through, which can ruin floor coverings, so ask any crew how they check that layer before the pour.
What license does a concrete contractor need in California?
The state's C-8 concrete contractor class covers contractors who form, pour, place and finish flat and other concrete work, and a house slab falls right in it. Ask anyone you're considering which license they hold before you sign anything.
Other concrete work we do
- Concrete driveway building
- Concrete patio construction
- Stamped concrete services
- Concrete sidewalk building
- Garage floor concrete
- Decorative concrete
- Concrete retaining walls
- Concrete floor installation
- Concrete pool decks
- Concrete steps construction
- Foundation installation
- Concrete parking lot building
- Concrete footings
- Foundation raising
- Concrete cutting
Call Alliance Novato Concrete in Novato
Call (628) 209-1066 or email team@novatoconcretecontractor.com with your address and rough slab size, and I'll come look at your ground before your plans are locked in.
