Water and ground cause most concrete failures here. The valley has sandy river soil, clay-bearing hills and thousands of homes on cut and fill pads. Each behaves differently under a slab.
Do I need to worry about drainage when I add concrete?
Yes. Drainage should be drawn before the forms are set. Every new slab sheds water that the soil used to absorb. Tract lots here were graded to carry water to yard drains and out to the street. New concrete must keep that path working, with a slope of about a quarter inch per foot and no buried drain inlets.
My patio or driveway slopes toward the house. How is that fixed?
A slab that tilts toward the house needs the water caught before it reaches the wall. For a driveway falling toward the garage, a channel drain across the front of the door, piped to the street side, is the usual answer. For a patio, the lasting fix is to repour with fall away from the wall. Lifting the house side with foam can work if the slab is sound.
Can tree roots crack or lift concrete?
Yes. Tree roots thicken every year and lift whatever lies over them. Sidewalk and driveway panels near street trees show it first. Roots do not break into sound concrete so much as raise it, and the panel then cracks over the hump.
Can I fix the concrete and keep the tree?
Often you can keep the tree. Options include bridging the root with a thicker reinforced panel, curving the walk away, raising the grade slightly or using pavers over that spot. Cutting large roots near the trunk risks killing the tree or leaving it unstable. In the City of Santa Clarita oaks are protected, so ask the City before any cutting near one, and bring in an arborist.
My neighbor's new concrete sends runoff onto my property. What can I do?
Talk to the neighbor first and show them photos taken during rain. In California an owner who changes the natural flow of surface water and acts unreasonably can be liable for the damage. If talking fails, the building department can say whether a grading or drainage rule was broken, and an attorney can advise you. On your side, a swale or drain along the line protects your yard.
Does clay or soft soil change the job?
Yes. On expansive clay we use a compacted rock base, steel in the slab and closer joints, and we keep irrigation from soaking one edge. On soft or loose fill, the weak material is dug out and replaced in compacted layers. Along the Santa Clara River the sand is firm once wetted and compacted.
My house is on a fill pad next to a slope. Does that matter?
It does. The outer part of a graded pad is often fill, and fill settles more than cut ground. Slabs near the top of a slope get extra steel, and water is always directed away from the slope face. Cracks in the yard that run parallel to the slope are a reason to call a geotechnical engineer, not a concrete crew.
My gravel driveway turns to mud every winter. Is concrete the answer?
It can be. A gravel driveway goes to mud because fines work up through the rock and water has nowhere to go. Concrete ends that, provided the drainage is shaped first. On long rural drives in Agua Dulce, Val Verde or Acton, some owners pave only the steep part and the area by the house and keep rock on the rest.
My patio was poured over an old utility trench and that strip settled. Why?
Backfill in a trench is rarely packed as hard as the ground beside it. Over a few wet seasons it settles and the slab above it dips or cracks along the line. The repair is to cut out that strip, recompact the trench in layers and repour, or to lift the slab if it is unbroken.
Can I build a raised patio or slab on a lot that floods or sits by a wash?
Flood risk here comes from winter storms in canyon bottoms and beside washes, and from debris flows below burned hillsides. A raised patio or slab can keep a surface above nuisance water, but fill in a mapped flood zone is regulated and may need a permit. Check your address on the FEMA flood map and with the City or County before raising grade.
Do earthquakes damage driveways and patios?
They can. This valley was shaken in 1971 and 1994. Flatwork usually comes through with widened cracks or shifted panels, and steel keeps the pieces together. Steps, walls and slabs tied to the house deserve a look after any strong quake.
Your own price comes from a free visit, a tape measure and a written quote. Call (661) 718-4706, or text a photo of the area to the same number.