Most people find one clue and panic. A crack over the hall door. A gap under the baseboard. A sliding door that drags.
One clue rarely means much. Houses crack. Wood shrinks. Stucco checks in the sun.
What matters is the pattern. Do the clues line up? Do they point the same way? Do they cluster on one side of the house? That’s what tells you if the ground is moving or the house is just aging.
So don’t judge the first thing you see. Walk the whole house. Put every clue on one sketch. Then step back and look.
Why Poway needs the full walk
Poway isn’t one kind of ground. The City’s Safety Element names landslides, rockfall, seismic movement, settlement and expansive soils as the principal geologic hazards. It ties fill settlement and expansive soil problems mostly to fill made from the Friars and Mission Valley formations.
Other lots sit on decomposed granite. That ground drains better and swells less. Plenty of hillside lots are part cut into rock and part built up with fill. One end of the house sits on firm ground. The other end sits on fill.
That’s why a single clue misleads here. The same crack can mean nothing on a granite pad and a lot on a clay fill lot. The pattern tells you which house you have.
Draw the floor plan first
Grab a sheet of paper. Sketch the house from above. Rough is fine. Mark north. Mark the garage, the patio, the pool and any retaining walls.
Now give each clue a number and put it on the sketch. Keep a matching list:
- Number
- Where it is
- What it is
- How big
- Date found
Take a photo of each one with a tape or coin in the frame. That’s your baseline.
Start at the curb
Stand across the street. Look at the house as a whole.
- Is the roof ridge straight, or does it sag or dip?
- Are window heads level with each other?
- Does the fascia line run true, or does it wave?
- Does the garage door gap look even top to bottom?
Then walk the outside. Look at the stucco on every wall. Note diagonal cracks off window and door corners. Note cracks that run along the bottom of the wall near the weep screed. Look at the foundation edge where you can see it.
Garage and flatwork
The garage slab is the one place you see bare concrete. Use it.
- Shrinkage cracks are common. They’re thin and often run in a random pattern.
- Note any crack with one side higher than the other.
- Note cracks that line up with cracks in the house wall next to them.
Then walk the driveway, walks and patio. Flatwork moves on its own. It doesn’t prove foundation movement. But if the patio drops away from the house on the same side where the house shows cracks, mark it.
Inside, room by room
Go through every room. Same order every time.
Doors. Open and close each one. Note rubbing, gaps that taper, and latches that miss. Note which way the door is out of square.
Walls. Look above doors and windows. Look where walls meet ceilings. Note diagonal cracks and their direction.
Floors. Roll a marble or use a level. Note which way things roll. Look for tile cracks that run in a line across a room. On a raised floor, note soft or bouncy spots.
Cabinets and counters. Look for gaps between counter backsplash and wall. Look for doors that won’t stay shut.
Up top and out back
Don’t skip the attic if you can get in safely. Look for daylight at joints, separated framing and stains. Movement down low often shows up up high, too.
Out back, check retaining walls for lean, bulges or open joints. Check the pool coping and deck for separation. Check the slope below the pad for cracks in the soil, bulges or wet spots that don’t dry. The Safety Element notes that saturated slopes can lose strength. Water on a slope is worth a note every time.
Reading the finished sketch
Now look at the sketch as a whole. Ask a few plain questions.
Do the clues cluster? If most marks sit on one side or one corner, that side may be moving. On a cut-and-fill lot, check if that’s the fill side.
Do cracks point the same way? Diagonal cracks that all slope toward one corner can point to that corner dropping.
Do floors agree? If the marble rolls the same direction in three rooms, write it down.
Do outside and inside match? A stucco crack outside that lines up with a drywall crack inside is a stronger clue than either alone.
Is it seasonal? Clay soil swells when wet and shrinks when dry. Cracks that open in late summer and close in winter point that way. Check your dated photos.
If the clues scatter with no pattern, that’s often good news. It can mean ordinary shrinkage and settling of materials. If they line up, it’s time for a measurement.
Do and don’t
Do:
- Walk the whole house before deciding anything.
- Date every photo and every mark.
- Check for water first: leaks, irrigation, gutters, drains.
- Pull the grading or soils report if you have one. Our post on reading cracks in a Poway house covers what to measure.
- Re-check the same clues after the rainy season and again in late summer.
Don’t:
- Patch cracks before you photograph and measure them.
- Fill a crack and call it fixed.
- Assume one stuck door means a failing foundation.
- Change grading or add irrigation near the house to “fix” settling.
- Hire anyone off one clue.
What a professional adds to your sketch
Your sketch is a good start. A professional evaluation adds measurement. That usually means a floor-level survey across the house, a closer look at the foundation itself, a check of drainage and slopes, and a review of any soils or grading records.
The California Residential Code sets the basics for foundations: footings on undisturbed soil or properly compacted fill, and soils investigations where expansive or questionable soils are expected. An evaluation checks the house against what the ground under it is actually doing.
We do the structural walk-through and coordinate with licensed engineers as needed when the pattern calls for a soils study or structural design. See our sloping floors page and fill settlement repair page for what comes next if movement is real.
Bring the sketch
We work across all of Poway, from older tracts near Poway Road to the big lots in Green Valley and on the hills.
Got a sketch with more than a handful of marks? Good. Bring it. Request a Free Quote and we’ll walk the house with you.