Introduction
Pour day has a way of exposing everything skipped earlier: the trench that’s six inches shallow, the rebar still on the dirt, the inspection nobody scheduled, the truck that can’t reach the trench. A checklist doesn’t make the work easier — it makes the failures visible while there’s still time to fix them. Walk this list the morning of the pour, in order, and the concrete goes into a footing that’s ready for it.
The Concrete Footing Calculator covers the quantity check — run length, width, depth, and waste in; concrete volume out. This checklist covers everything else: permits, layout, trench, steel, materials on site, the pour itself, and curing. Print it, clipboard it, check each line physically rather than from memory.
Before Excavation
- Permit in hand. Structural footings need an approved permit before work starts — drawings showing footing sizes, depths, and reinforcement. Confirm whether your project needs one; don’t assume.
- Utilities located. Call the local utility-locating service before any digging. Hitting a buried line with an excavator — or a shovel — is the fastest way to turn a footing into an emergency.
- Footing design confirmed. Width from the load-over-soil calculation checked against local minimums (the formula guide shows the method); thickness 20–30 cm (8–12 in) for residential work.
- Frost depth verified. Trench depth puts the footing’s base below the locally required frost depth — get the number from the building authority, not a national table. Frost-depth bands are in the code-compliance guide.
- Layout set and squared. Batter boards, string lines, diagonals checked on rectangular plans. Paint or stakes mark the trench lines.
- Materials ordered. Concrete quantity from the calculator plus waste, rounded up; rebar with lap allowance; chairs; form boards for steps and ends. The estimating guide gives the full takeoff sheet.
- Inspection scheduled. The footing inspection must happen with the trench open and steel placed, before the pour — book it when the steel goes in, not when the truck is idling.
Trench Check
- Depth correct at every point. Measure from finished grade to the trench bottom in multiple spots — base below frost line plus footing thickness. A bottom that wanders changes the concrete volume and the bearing level.
- Bottom level and firm. Straightedge and level along the run; the bottom bears on undisturbed soil, not loose backfill or topsoil. Over-dug spots filled with lean concrete, never loose dirt.
- Walls stable and near-vertical. Caving or sloped walls mean formwork is needed — or a wider pour with the extra concrete accounted for in the order.
- Dry and clean. No standing water, no mud, no debris. Pump dry and remove soft material; never pour on a saturated bottom.
- Steps correct on slopes. Each step level, dropping no more than the footing’s thickness, each at least 0.6 m (2 ft) long, risers formed.
- Width matches design. Measure the actual trench — the concrete order follows the footing dimensions, and any over-width sections get noted for the waste allowance.
Rebar Check
- Bar size and count per design. Typically two continuous 12 mm (#4) bars, one near each face — verify against the drawings, not memory.
- Chairs in place. Every 1.0–1.5 m (3–5 ft) per bar line, holding steel up for 75 mm (3 in) minimum cover below and at the sides. No bars touching dirt or trench walls.
- Laps correct. 40 bar diameters at every joint — 0.48 m (19 in) for 12 mm bars — staggered between the two bars so joints don’t align.
- Corners continuous. Bars bent around corners or L-shaped corner bars lapped into both legs; no dead stops at turns.
- Steel clean. Mud, oil, and heavy scale removed; light surface rust acceptable. Rebar details are in the material guide.
- Inspection signed off. The open trench and placed steel approved in writing before concrete is ordered for delivery.
Pour-Day Check
- Concrete order confirmed. Quantity (calculator volume + waste, rounded up), mix strength (typically 20–25 MPa / 3,000–3,600 psi for footings), delivery time, and truck access — chute range ~4 m (13 ft) or a pump booked.
- Crew and tools ready. Enough hands to place and strike off continuously; vibrator or rodding tools; straightedge for screeding the top level; wheelbarrows as backup.
- Weather acceptable. No heavy rain forecast; protection ready for the open trench and fresh concrete. Never pour on frozen ground.
- Pour sequence planned. Start at one end, work continuously to the other; on stepped footings, pour uphill to downhill. Know where the construction joint goes if the pour must stop.
- No water added at the trench. Workability problems go back to the supplier as a mix question — the hose stays off. The pro tips guide covers pour-day practice.
- Top struck level. Screed the footing’s top surface flat while plastic — the wall or slab above sits on it.
After the Pour
- Curing started. Cover with plastic sheeting or wet burlap; keep moist for the first several days, especially in heat or wind. Strength comes from hydration, not drying.
- Protected from freezing. Insulated blankets or enclosures if temperatures threaten freezing in the first days.
- Backfill timed right. Wait a few days for strength gain (longer in cold weather) before backfilling; compact in 15–20 cm (6–8 in) lifts.
- Records kept. Note the pour date, mix ticket, and any inspection sign-offs — the paperwork for the buried work, filed while it’s fresh.
Quick-Reference Targets
| Item | Target (metric) | Target (imperial) |
|---|---|---|
| Footing base depth | Below local frost line | Below local frost line |
| Typical footing size (house) | 45–60 cm wide × 25–30 cm deep | 18–24 in wide × 10–12 in deep |
| Rebar | 2 × 12 mm continuous | 2 × #4 continuous |
| Lap length | 0.48 m | 19 in |
| Concrete cover | 75 mm min. | 3 in min. |
| Chair spacing | 1.0–1.5 m | 3–5 ft |
| Concrete waste allowance | 10% (12–15% irregular/stepped) | 10% (12–15% irregular/stepped) |
| Backfill lifts | 15–20 cm | 6–8 in |
Related Guides
- Concrete Footing Complete Guide — strip footing sizing, trench dimensions, and the full worked example.
- Concrete Footing Pro Tips — the field practices behind each checklist line.
- Concrete Footing Common Mistakes — what the checklist is designed to catch.
- Concrete Footing Code Compliance — permits, inspections, and frost-depth rules.
- Concrete Footing FAQ — quick answers to the most asked footing questions.
- Concrete Footing Estimating Guide — the quantity takeoff for the materials check.
Frequently Asked Questions
When should I walk the footing checklist?
The morning of the pour, in order — trench, steel, materials, access — with the inspection already signed off. Earlier walkthroughs at layout and steel-placement stages catch problems cheaper.
What is the single most-skipped checklist item?
The pre-pour inspection. Everything else gets checked because the pour forces it; the inspection gets skipped because nothing forces it until the inspector does — usually at the worst moment.
How do I check trench depth correctly?
Measure from finished grade (not the spoil pile) to the trench bottom at multiple points along the run. The base must clear the local frost depth everywhere, not just on average.
What should I do if the trench has standing water on pour day?
Pump it dry, remove any softened material down to firm ground, and re-check the bottom level. Pouring into water mixes it into the concrete at the bearing interface — delay the truck rather than pour wet.
How do I verify rebar cover in the trench?
Measure from the bar to the trench bottom and walls at several chairs — 75 mm (3 in) minimum everywhere. If a bar sags between chairs, add chairs; the spacing is a maximum, not a target.
What paperwork should I keep after the pour?
The permit, the inspection sign-off, the concrete delivery ticket (mix, quantity, time), and the pour date. If anything is ever questioned about the buried footing, this file is the answer.
Check It, Then Pour It
A footing pour is a one-way operation — the checklist is how you make sure it’s a one-time operation too. The Concrete Footing Calculator settles the quantity question from your run length, width, depth, and waste allowance; the list above settles everything else. Walk it line by line, fix what fails, and pour with confidence.
Disclaimer: Calculator results are planning estimates based on the dimensions you enter. Actual footing requirements vary with soil conditions, local frost depth, trench accuracy, and code requirements. Verify volumes with your supplier and consult a licensed professional or your local building authority for structural or code-related decisions.
