How to Pour a Concrete Slab
November 9, 2026
To pour a concrete slab, dig out and compact a gravel base, build level forms, add reinforcement, then place, screed and finish the concrete before it sets. Small slabs can be mixed on site with a rented mixer; bigger ones use ready-mix delivered by truck.
Equipment for each step
| Step | Rent or use |
|---|---|
| Dig and level | Shovels, a [mini excavator](/mini-excavator-rental/) for large pads |
| Compact the base | [Plate compactor](/plate-compactor-rental/) |
| Mix | [Concrete mixer](/concrete-mixer-rental/) for small pours, ready-mix for large |
| Place far from the truck | Wheelbarrow, buggy or a [concrete pump](/concrete-pump-rental/) |
| Cut control joints | [Concrete saw](/concrete-saw-rental/) or a groover |
Step by step
- Check permits and call 811. Many slabs need a permit, and digging needs notice.
- Excavate to the slab depth plus 4 to 6 inches of base.
- Compact the base. Spread gravel in thin layers and run a plate compactor over each.
- Build forms from straight boards, staked and level, with a slight slope for drainage.
- Add reinforcement such as rebar or wire mesh, raised off the base on supports.
- Pour and spread the concrete, working from one end.
- Screed with a straight board across the forms, then float the surface.
- Finish and cut joints. Edge the slab, add a broom finish for grip, and cut control joints.
- Cure. Keep it damp for several days, and keep traffic off it.
Mistakes to avoid
- Skipping compaction. Soft base means cracks.
- Adding extra water. It makes concrete easier to place but weaker.
- Pouring with too few helpers. Concrete won't wait.
- Rinsing tools into a drain. Contain washout water.
Where to rent concrete equipment
Concrete mixer rentals are searched about 140 times a month in New York City and 110 in Houston. Search your city on Jobsite Jockey to compare suppliers.
In short: compact a gravel base, build level forms, reinforce, then pour, screed, finish and cure. See the concrete equipment rental guide.