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Serving Corte Madera, CA and surrounding areas. (628) 212-4120
Your floor is cracking, uneven, or letting moisture through. We pour and seal concrete floors built for Bay Area humidity, with the right prep so the slab stays solid for decades.
Concrete floor installation in Corte Madera means removing the existing surface, preparing the ground underneath, and pouring a fresh slab - most residential jobs take one to three days of active work, plus 24 to 48 hours before you can walk on it and roughly 28 days before the floor reaches full strength.
Most homeowners reach out after dealing with a floor that cracks, stays damp, or has uneven spots that keep damaging whatever flooring they put on top of it. In Corte Madera, the proximity to San Francisco Bay means coastal humidity is a year-round factor - and the expansive clay soils in parts of Marin County create seasonal movement that puts stress on slabs not properly prepared for it. If you also need concrete work in an attached garage, our garage floor concrete service can be coordinated in the same project.
Every job starts with a free on-site assessment. We look at the existing floor or subgrade, check for moisture issues, measure the space, and give you a written quote before anything is scheduled.
If you can see cracks that are getting wider or have an uneven lip where one side sits higher than the other, the floor is moving. In Corte Madera, this often traces back to clay soil shifting with the wet-dry seasonal cycle. Hairline cracks can sometimes be addressed cosmetically, but cracks you can fit a coin into usually mean the slab itself needs attention.
Walk slowly across your floor and pay attention to whether it feels level. A floor that dips, bounces slightly, or has a noticeable slope means the slab has settled or eroded underneath. This is especially common in Corte Madera homes built in the mid-20th century, where original slabs have had decades to shift.
If you notice damp patches, white chalky deposits, or a musty smell coming from your floor, moisture is likely moving up through the concrete from below. Given Corte Madera's proximity to the Bay and the area's naturally higher water table in some neighborhoods, this is a common and real issue. Left unaddressed, it creates conditions for mold growth and destroys flooring put on top of it.
If you have replaced tile, laminate, or vinyl in the same spot more than once and it keeps cracking, lifting, or bubbling, the problem is almost certainly the concrete underneath - not the flooring itself. A damaged or uneven slab will destroy whatever you put on top of it. Getting the concrete right first stops the repair cycle.
Every floor project starts with a careful assessment of the existing subgrade. We check for moisture intrusion, soft spots, and level issues before any concrete is mixed. Then we prepare the base - compacting soil, placing gravel where needed, and setting reinforcing mesh or rebar - so the finished slab has a stable platform that is not going to shift with the seasons. These preparation steps are what separate a floor that lasts 30 years from one that cracks in five.
For homeowners whose project also involves placing concrete under a new structure, our slab foundation building service covers structural slabs designed to carry load - a different spec from a residential floor pour. Both can be coordinated when the work happens in the same area of the property.
After the pour, we apply a sealer matched to the specific conditions in your space - a coastal climate sealer for areas with moisture exposure, or a harder surface finish for high-traffic zones. The Portland Cement Association documents why sealing matters in humid coastal environments, and we follow those standards on every project.
Best for garages, utility rooms, and laundry spaces where durability and ease of cleaning matter more than appearance.
Best for kitchens, living areas, and commercial spaces where a clean, low-maintenance surface that looks intentional is the priority.
Best for Marin County homeowners who want color and character in a surface that holds up under daily use without the maintenance of tile or hardwood.
Best for homeowners whose existing slab is structurally sound but has surface cracks, staining, or an uneven finish that needs to be corrected before new flooring goes down.
Corte Madera sits just inland from San Francisco Bay, and the air here carries more moisture than in drier parts of California. That humidity affects how concrete cures, how quickly an unsealed surface absorbs moisture, and how long a floor stays clean and intact. A contractor who has only worked in the Central Valley or Southern California will not automatically account for these conditions. Choosing the right sealer for this climate is not a finishing detail - it is part of getting the floor right.
Much of Corte Madera's residential housing was built between the 1940s and 1970s. If your home is from that era, there is a real chance the original slab has had 50 or more years to settle, absorb moisture, and develop stress cracks from seasonal soil movement. Before any new pour, we assess the existing slab carefully. In some cases repair and resurfacing makes more sense than full replacement. In others, the old slab needs to come out entirely. You will know which situation applies before any work begins.
We serve homeowners throughout the area including Sausalito and Tiburon where bay-adjacent humidity creates similar floor challenges. Homeowners in San Rafael also deal with the same mid-century housing stock and soil conditions, and we bring the same site-specific approach to every job across these communities.
You reach out and we respond within one business day to schedule a site visit. We ask about the room size, what is currently on the floor, and what you want to end up with. You do not need all the answers - just describe what you are seeing and what you want to fix.
We come to your home, check the existing floor or subgrade for moisture and level issues, measure the area, and note any access challenges. Within a few days you receive a written estimate that breaks down what is included and what is not - no vague ballpark figures.
For most interior concrete floor work in Corte Madera a building permit is required. We handle the permit application - this typically adds one to two weeks to the start date but protects you and ensures the work is inspected. Once approved, we confirm the start date and let you know exactly how to prepare the space.
After demo and base prep, the concrete is poured and finished in a single day for most residential spaces. You can walk on it within 24 to 48 hours. Once the floor reaches sufficient strength, we apply the sealer and walk through the finished space with you to confirm everything matches what was agreed.
We handle permits, assess moisture conditions specific to your property, and give you a written quote before any work is scheduled.
(628) 212-4120We check the ground beneath every floor before mixing a single bag of concrete. In Corte Madera's mid-century homes, original slabs often have decades of settlement, moisture intrusion, or soft spots that need addressing first. This step is what prevents cracks from coming back after the new floor is in.
Living near the Bay means your home deals with humidity that most of the country never has to think about. We apply sealers rated for coastal moisture exposure on every floor we install here. You will not be dealing with damp spots or chalky residue a year after the job is done.
We handle the permit application with the Town of Corte Madera Community Development Department on your behalf. A permitted floor is inspected and on record, which matters when you refinance or sell the home. You should not have to manage the building department yourself.
We serve Corte Madera, Mill Valley, Larkspur, San Anselmo, Tiburon, San Rafael, Novato, Sausalito, Fairfax, San Francisco, Richmond, and Berkeley. Knowing the local soil, moisture, and housing conditions in each of these 12 communities lets us spec floors that actually fit the conditions of the building.
The difference between a floor that lasts 30 years and one that cracks in five comes down to preparation and sealing - neither of which is visible once the job is done. We prioritize both because a floor that performs well is what earns the next referral from your neighbor.
Dedicated garage floor pours with surface hardeners and sealer designed to handle vehicle traffic and motor oil exposure.
Learn moreStructural slab foundations for new additions and ADUs, engineered to carry load on Corte Madera's clay and fill soils.
Learn moreDry season booking fills up fast - contact us now to get on the schedule and have your floor done before the rains return.