A patio holds a table and nothing heavier, so the ground under it decides what happens next. Katella Anaheim Concrete reads which of this city's two grounds your garden sits on before a depth is written.
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The slab with nothing on top
This city answers the question twice. Four inches of concrete weighs around fifty pounds to the square foot and spends its life under a table and two chairs, so it presses back on the subgrade less than any other pour on the lot. Up the canyon side, where the tracts were graded in the 1970s and 80s, the ground is mapped Alo clay at 48 percent clay with a linear extensibility of 9.3. It swells through a wet winter and pulls back by late summer, and the lightest slab rides up first.
The flat half of the city has the opposite problem. Metz loamy sand and San Emigdio fine sandy loam lie beneath the streets through the middle and everything west of them: 13 percent clay, sand from 70 up to 85 percent, extensibility near 1.2, so the seasons barely register. What they do is travel. Sand holds no cut face and washes where water runs, so a downpipe soaking against an edge empties the bedding until a corner spans nothing. Check your block on the USDA Web Soil Survey.
The classification is C-8 for concrete, held on the California Contractors State License Board register, and every job runs under liability insurance on every job from the day the breaker starts. Depth is settled standing in your garden rather than at the yard on Katella, because the dig is the part of this job you are really buying. A roof over the slab is drawn separately. Every patio we finish carries a written workmanship guarantee against defects in how it was built.
When patching stops paying
The slab now stands proud of the threshold it was once flush with, and the door catches on the mat in February and clears again in September. That is clay working underneath, taking up water and giving it back yearly. Grinding the lip off treats the height, not the lift behind it.
Stand on the outer corner and it gives, then comes back. Underneath is an empty pocket where sand has washed out from beneath the edge, usually below a downpipe or where a border gets soaked all summer. Foam pumped in resets the level, but the water keeps its route.
A break traveling diagonally across the open middle means the slab had no sawn lines to shrink along, or none deep enough to work. Old rear strips were often laid three inches thick and left uncut, so the concrete chose its own line. Filling one that wide is decoration.
Kneel at a broken edge and look at what the concrete is bedded on. A great many patios behind the 1950s tracts here were poured straight onto graded soil with no stone beneath them. Nothing down there spreads a load or lets water leave, and no coating on top fixes that.
Never billed as extras
Eight things are in the figure on your sheet and none appears as an addition later. Each is an answer to something this ground does to a slab: sand that migrates on the flat, clay that swells on the hill pads, and damp mornings that hold a green surface open.
A hole goes down beside the old slab on the visit day. The soil that comes up, and the map unit under your block, set how far the dig runs.
Worn concrete, the thickened lip along its edge and any old post bases are carted off the lot rather than left to bed the new slab.
Crushed rock, not the rounded stone this ground is full of, plate-compacted in layers. Round gravel rolls under load; angular rock locks together.
Four full inches of ready-mix batched at 3,500 psi, which carries furniture and people unaided. Batch tickets go in the folder with your paperwork.
On the canyon-side pads the perimeter is dug deeper than the field, so the rim of the slab is not the part the swelling ground gets under.
Filler board separates the pour from the house, from any boundary wall and from post bases, so seasonal movement never pushes on masonry.
The surface is screeded to shed at roughly a quarter inch per foot, and its low side is aimed at planting or a channel, never at open sand.
Joints go in before anyone drives away, and then seven days of keeping it wet, so a dry offshore afternoon cannot pull the surface open early.
One slab, four tops
Under all four the dig, the rock and the four inches are the same, so what is being picked is the walking surface. Two things decide it: what it takes to get the material to the back of the house, and how the finish reads after a few winters.
| Option | Life on this ground | Back in use | What it asks later | As the ground moves |
|---|---|---|---|---|
| Broom-finished gray | 30 to 40 years | Furniture back at 7 days | Reseal on a 4 to 5 year cycle | Movement lands in the saw cuts and stays there |
| Stamped and colored | 25 to 30 years | Same pour, mats carried down the side | Sealed again every 2 to 3 years for color | A hairline shows through the pattern; a lip still reads |
| Exposed aggregate | 35 years and beyond | Washed off before the crew leaves | Rinse each spring, reseal about every 4 | Rough texture hides a small step better than any |
| Sand-set pavers | 30 to 50 years over a built base | Walked on the same afternoon | Joint sand topped up roughly yearly | Follows a heave instead of spanning it, and dips |
A pattern or a color asks for sealing about twice as often as plain gray, which over thirty years is where the real difference lands.
Which counter takes it
This city runs two permitting systems and a rear garden slab meets only one. The Building module answers on (714) 765-5153; work past the boundary goes through the separate Public Works portal.
The exemption people quote at us is narrower than they think. Residential Code section R105.2 waives a permit for sidewalks and driveways standing under 30 inches over adjacent grade with nothing occupying a story underneath, and it names no patio slab, nor flatwork as a category. Nobody can promise from a code book that your garden is clear of it. The drawing goes in through the city's own Anaheim NEXT permitting portal, and we build to the answer that comes back.
The roof is the easier half. A cover on posts is a structure in its own right, so it is drawn, filed and inspected regardless of what the concrete beneath it needs, and its posts land on footings rather than on the slab. On the canyon-side clay those footings go below the depth the seasonal swelling reaches, which is deeper than people expect. Formed into the wet pour they cost a morning; cored through cured concrete two summers later they cost a day.
Five stages, in order
From the morning the shape is marked out on your lawn to the evening the table goes back on it. Omar Espinoza measures the job himself, hands over the figure before he leaves, and is on the lot with the crew on pour day.
The shape is set out full size on the ground for you to walk before anything is agreed, and a hole beside it says what we are building on.
You pick the surface and see on the ground where the saw cuts will fall. If a roof is coming, it is drawn now so its footings form up in the pour.
The old slab and anything cast into it leaves the property, then we dig to the depth the trial hole set and prove the bottom before rock lands.
Rock is laid and plate-compacted in layers, the forms take up the falls, and the mix comes in by barrow, by pump line or off the alley.
Joints go in that day, the cure starts, the passage is washed down, and the slab is walked against your sheet before anyone leaves.
What moves the figure
Area starts it and four things pull it either way. Most rear slabs that seat six people come out between 250 and 400 square feet. Past the size it is your ground, the route in, the levels and whatever ends up standing on the finished concrete.
A flat lot on wash sand and a graded pad up the canyon are two different digs, and the trial hole rather than the postcode decides which.
A gate the barrow clears makes it a plain morning. Where the only way in is through the house, or a passage under a meter, the mix comes by pump.
A single rectangle is one set of forms. Ground that falls away needs stepping and a wall to hold the level, and any curve is formed by hand.
A cover, a spa or a built-in grill each stands on its own base. Cast in while the concrete is wet that is cheap; drilled in later it is not.
Neither the visit nor the written figure is charged for. The measuring is done on your own ground, item by item, and the form is answered within 1 business day. (657) 220-6196 or send us a message.
Ring the office or leave your details and we will find a slot this week. Somebody measures the garden, puts a hole down next to the old slab, and leaves the depths written out for you.
What owners told us
Three gardens, one up the canyon, one out west and one over the county road, described by the people who live with them. Omar Espinoza measured all three himself.
“Our old slab had climbed so far the slider would not swing over the mat by January. They dug the perimeter deeper than the middle because of the clay up here, put 340 square feet back at four inches and cut the joints that evening. Two winters and the door still clears.”
“The outer corner of ours rocked underfoot and it turned out the downpipe had been washing the sand out from under it for years. Omar moved where the water lands, rebuilt the base and laid 280 square feet in a light stamp. It has not budged and the pattern still looks new.”
“Our garden drops away at the back, so we needed two steps down off the slider as well as the slab. The crew formed both in the same pour rather than adding them after, laid 300 square feet and left the passage cleaner than they found it. A year on it is still one flat plane.”
Asked before booking
The counter, the roof over the slab, what lifts a patio on the canyon side, how the excavation depth is arrived at, keeping water off the edge, pouring in the late heat, and where the written cover stops.
We ask rather than assume. What the state code exempts is a short list that a garden slab does not appear on, so no page anywhere clears yours in advance. The drawing goes to the Building module on (714) 765-5153 with the dig depth and the joint layout marked, and the work follows whatever comes back. We stand at that counter and meet the inspector, so you need not.
Much cheaper that way, though nothing forces the order. Posts under a roof land on footings, and a footing formed while the concrete is still wet costs a morning. Left until afterward it means coring a finished slab and grouting an anchor into every hole, and on the canyon-side clay those footings reach below the depth the ground swells at. So the question gets asked at the measure.
Water in the clay. The graded pads east of the city are mapped Alo clay at around 48 percent clay, with a linear extensibility of 9.3, among the highest anyone in this county builds on. It takes up water through the winter rains and gives it back by late summer, and the ground lifts and drops with it. That is why the patio shifts while the drive beside it holds.
The trial hole answers that, not a rule of thumb. Whatever is soft, filled or waterlogged comes away and compacted angular rock takes its place, so the excavation runs as deep as the bad material does, plus the four inches over the top. That exchange appears as a depth in writing before anything is agreed. On the sand side we dig wider than the slab too, so a rock shoulder holds the edge.
By settling where it goes before the forms are set. The finished surface sheds at roughly a quarter inch per foot out into the garden, and the low edge discharges onto planting or into a channel rather than onto open sand. Downpipes are piped past the concrete instead of emptying beside it. On wash ground that detail decides whether a slab keeps its bedding or ends up spanning a hole.
No, but it is the month people misjudge. The Anaheim gauge normals run 86.8 degrees in July and 88.8 in August, and September sits at 87.8, within a degree of July, which is unlike the towns further inland. So the warm work carries on into autumn. Mornings are the other half: a marine layer can leave a surface too damp to close early, so we start on the cool end and cure for seven days.
Foot traffic after 24 to 48 hours, and the furniture returns at seven days. Anything genuinely heavy, a spa, a full outdoor kitchen, a vehicle crossing a corner, waits the full 28 days, which is when the mix has its rated strength. Color carries on shifting for a few weeks beyond that as the slab dries out evenly, and sealing waits until it has.
Inside it: the depth of the dig, the rock under the slab, where the joints fall, the thickness poured and the finish across the top. Those limits sit on the estimate you signed, so none of it arrives as news afterward. Outside it: staining, ordinary wear underfoot, and ground movement larger than a joint grid can absorb. Where the fault traces back to us, that section is broken out and poured again.
Past the city line
The eight towns nearest the Katella yard, closest first. Our radius runs 25 miles and holds 20 of them, and a rear slab in any one is dug, based and jointed to the sheet used here.
Four jobs cheaper to do now than to bring the forms, the saw and the mixer back down the side passage for a second time in a year or two.
Texture and pattern worked into the surface on pour day, chosen against the light that garden gets.
Color run through the mix, a banded border, or the top washed back to the stone.
On a canyon-side lot that falls away, a poured wall sets the level the slab is laid to.
The side path the barrow uses, relaid once the patio behind the house is finished.
Send the form or ring the number in the header and somebody answers within 1 business day. Omar Espinoza comes out, measures the garden, puts a spade in the ground beside it and hands over a written figure, and none of it is charged for.