Concrete
Concrete is the one trade where almost all of the quality is invisible by the time you see the result. Two slabs can be poured on the same day from the same truck and look identical — and one of them will still be flat in fifteen years while the other cracks apart in three.
The difference is under the slab and in the hours after the pour. Neither is visible in a photo, which is exactly why it is worth understanding before you compare quotes.
What is under the slab matters more than the slab
Concrete is enormously strong in compression and weak in tension. It does not fail because someone drove on it — it fails because the ground beneath it moved and the slab had to bend.
So the work starts below:
- Excavation to consistent depth, with soft spots and organic material dug out rather than covered
- A compacted base of gravel, in layers, compacted properly rather than raked flat
- Correct thickness for the use — a patio and a driveway that will hold a truck are not the same slab
- Reinforcement sized to the job, positioned in the middle of the slab where it does something, not lying on the ground where it does nothing
- Slope, planned before the pour, so water leaves the surface and goes somewhere sensible instead of toward the house
Bay Area soils make this more important than average. A lot of these lots have expansive clay that swells when it takes on winter water and shrinks back in the dry season — ground that moves every year, under a material that does not like to bend.
Control joints: cracking on purpose
Concrete shrinks as it cures and it will crack. That is not a defect and no contractor can prevent it. What can be controlled is where.
Control joints are cut at planned intervals to create a weak line, so the inevitable crack happens at the bottom of a straight, deliberate groove instead of wandering across the middle of your patio. Spacing is proportional to the slab’s thickness, and timing matters — cut too late and the slab has already chosen its own path.
If someone quotes you a slab with no joints, that is worth asking about.
Curing is not drying
The most common way good concrete gets ruined is being left alone right after the pour.
Concrete does not dry, it cures — a chemical reaction that needs moisture to continue and takes weeks to approach full strength. Water leaving the surface too fast, especially on a hot or windy day, produces a slab that is weak and dusty on top precisely where the wear happens.
That means keeping the surface damp or covered through the first days, and telling you honestly when it can take foot traffic and when it can take a vehicle. Those are different dates, and the second one is later than most people expect.
What we pour
- Patios and walkways — including slope away from the foundation
- Driveways and parking areas — thickness and reinforcement matched to the vehicles
- Sidewalks and steps
- Foundations, footings and slabs for additions, sheds and outbuildings
- Footings for retaining walls and fences
- Repairs — replacing broken sections, and lifting or replacing slabs that have moved
Residential and commercial both.
What it looks like while we are there
Excavation and forming take longer than the pour itself. The pour is a single continuous stretch that cannot be paused — once it starts, it finishes — so we confirm access, timing and where the truck can sit before the day arrives.
Vehicle access matters more here than in any other trade. If the only route to the back yard is a narrow side gate, tell us early; it changes the method and the cost.
Across the Bay Area
We pour concrete in San Rafael, Tiburon, Mill Valley and across Marin, in San Francisco, and out through Berkeley, Orinda, Walnut Creek and Vallejo.
Every job starts with an in-person look at the ground — there is no responsible way to quote a slab from a description. Call and tell us what the area will be used for, and we will come see what it is sitting on.